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NUMMER 41 • NAJAAR 2010

1. James Clark DTD DSSSL Style Sheet EN gt lt style sheet gt style specification id pulps plus style specification body declare flow object class page footnote UNREGISTERED Sebastian Rahtz Flow Object Class page footnote root let margin size 1in make simple page sequence page width 210mm page height 297mm left margin margin size right margin margin size top margin margin size bottom margin margin size header margin margin size footer margin 12mm center footer page number sosofo process children element story list sgml make sequence let get pulp lambda node list select elements children node list pulp process node list apply node list list stable sort node list gt list node list filter lambda node list not node list empty get pulp node list children current node lt lambda story node list string gt number attribute string nb get pulp story node list element story let story indent 20pt current children children current node pulp node list select elements current children pulp pulp processed process node list pulp node list pulp title string data pulp node list title processed process node list select elements current children title make paragraph first line start indent story indent font size 12pt space before 10pt start indent story indent pulp processed space literal if string null
2. The second problematic is an inevitable result of the first there is always an edge case Take as an example a variation on the code I ve already shown Say Haltiwanger that instead of converting to HTML one would rather generate a PDF using ConTpxt Seems straight forward right My Header The above should simply convert into the top level equivalent in ConTEXt But wait That would be a matter of what one was trying to accomplish wouldn t it After all the above Markdown snippet could easily refer to subject My Header or section My Header or chapter My Header or even title My Header What is the solution here Should a reserved character be adopted for each of these cases Questions of how to deal with such edge cases are intrinsically tied to the translation layer itself because all format translation occurs within the translation layer it is the decisions which that layer makes that determine how edge cases are handled Pandoc provides command line switches for turning on numbered sections and for determining the top level section However were one to desire that a custom command or macro be used in place of any of the above a knowledge of Haskell is required to write scripts or otherwise modify the way that Pandoc converts its inputs Other tricks can be employed such as the introduction of a glue layer based in a script which solves certain edge cases with regular expressions and i
3. for mark in node traverse_id WHAT head do local attr node has_attribute mark 100 if attr then local item mark next while item do if item id HLIST then node set_attribute item 100 attr item nil else item item next end end head node remove head mark end end return head end The following function scans the content of a verti cal list probably box 255 finds the lines that have attribute 100 set to some value and adds the margin notes to those lines Remember that our goal is to avoid margin notes running into the space below the textblock either the bottom margin or the vacant space at the end of a chapter So we must compute how much space remains to accommodate the note To do so we scan the box the page starting at the bottom and accumulate the height and depth of lines and the width of kerns and glues except kerns and glues that might appear before the last line i e space filling the page To 42 MAPS 41 do so we have a first boolean that is true as long as a line hasn t been found and prevents adding the width of glues and kerns With node slide we grasp the last node of the list since we re reading it backward process _marginalia function head local remainingheight first item Q true node slide head while item do if node has field item kern then if not first then remainingheight remainingheight item kern end elseif node has field item spec then if n
4. het is november zeldzaam zacht De appelboom majestueus met zijn takken armen vol met Wat een weelde bladeren op het gras herfst en staat fier en stevig geworteld als uitgespreide appels wat een pracht Van de vroege aangetaste appels heeft deze reus zich al in juli en augustus ontdaan Nu hangen er nog een en al gave ponders tjokvol met sap Het is een rijkdom zo n appelboom op en ruime plek in de tuin een genoegen het hele jaar door de lente zomer herfst en bloesempracht in schaduw in de oogst in de een Mondriaan silhouet in de winter His unfinished Victory Boogie Woogie is shown on the cover of the biography about Mondriaan MONDRIAAN COMPLEET Mondriaan has the reputation to be very precise and I was curious whether some of his works could be generated randomly in color and nevertheless convey a Mondriaan impression although at the time he did not use color for the random pictures given on the next page la Mondrian EET Ie arn perl bate 1 pan Je re roe sth ikt iy plis da Hilt i ney Tan ar by Mee bree m AA ern e ai Mad HE tatu ll i el TA a F F avi W e rHate m tie h Composition in Line 1916 Composition 10 1915 Variation of Mondriaan s random art Is it random As far as I understand it his work was composed precisely very precisely as witnessed by his unfinished Victory Boogie Woogie where sev
5. local palette colorspace trans duotone 100 duotone 100 0 n 256 fillcolor palette 101 On the last line the color object simple Lua table is set in a graphic state Lua dictionary and its color space another Lua dictionary is registered in a page resources dictionary yet another Lua dictionary The graphic state object takes care of updating a pdf content stream and finally the resources dictionary knows how to become a pdf dictionary It s never to late When talking about pdf objects construction I ve concealed one sticky difficulty If I want to handle graphic setup using latelua I need to be able to create pdf objects during shipout Generally latelua provides no legal mechanism for that There is the pdf obj standard function a LuaTEX equivalent of the pdfobj primitive but it only obtains an allo 28 MAPS 41 cated pdf object number What actually ensures writ ing the object into the output is a whatsit node in serted by the pdfrefobj lt number gt instruction But in latelua it is too late to use it Also don t try to use pdf immediateobj variant within latelua as it writes the object into the page content stream resulting in an invalid pdf document So what can one do LuaTEX allows one to create an object reference whatsit by hand If we know the tail of the list currently written out or any list node not yet swallowed by a shipout procedure we can create
6. mkvi then return lpegmatch parser str or str else return str end end if resolvers schemes then local function handler protocol name cachename local hashed url hashed name local path hashed path if path and path then local data resolvers loadtexfile path data lpegmatch parser data or io savedata cachename data end return cachename end resolvers schemes install mkvi handler 1 this will cache utilities sequencers appendaction resolvers openers helpers textfileactions mon system resolvers macros processmkvi end Taco Hoekwater amp Hartmut Henkel NAJAAR 2010 19 LuaTEX 0 60 Abstract TEXLive 2010 will contain LuaTEX 0 60 This article gives an overview of the changes be tween this version and the version on last year s TEXLive Highlights of this release cweb code base dynamic loading of lua modules various font sub system improvements including support for Apple dfont font collection files braced input file names extended pdf Lua table and access to the line breaking algorithm from Lua code General changes Some of the changes can be organised into sections but not all So first here are the changes that are more or less standalone o Many of the source files have been converted into cweb Early versions of LuaTEX were based on Pascal web but by 0 40 all code was hand converted to C The literate programming comments were kept and the relevant sources have n
7. which is a cmyk profile for coated paper Note that we are using a name and not a filename to avoid clashing with the values of the profile key By doing so we accept these implicit limitations and color space conversions a if the output intent is a cmyk profile then the docu ment can have only cmyk and gray colors a if the output intent is a rgb profile then the docu ment can have only rgb and gray colors a if the output intent is a gray profile then the docu ment can have only gray colors They are reasonable in general we cannot use a rgb color with a cmyk profile because there are rgb col ors without equivalent cmyk ones that is to say that screens display more colors than printers We can convert a gray color to rgb or cmyk because usually gray color spaces are a subset of the former otherwise we have a really poor device It s not an error if we specify both profiles and output intent at least if all color spaces have their own profiles as in the example then the output intent is simply ignored by a PDF A compliant PDF reader Finally the images we must be sure that every image has its color profile and this can be a bit complicated In the following example rgb noprofile jpg is a jpeg image with a RGB color space and without a color profile setupbackend format pdf a 1a 2005 level 0 profile default_cmyk icc default_rgb icc default_gray icc setupstructure state start starttext sta
8. A list of nodes is a sequence of such atoms linked together A simple paragraph for instance is a list made of horizontal boxes the lines penalties and glues The boxes themselves are lists containing mostly glyph and glue nodes Nodes are linked together like beads on a string and the prev field of a node points to the preceding node in the list whereas the next field returns the one that follows there is an understandable exception for the first and last nodes of a list whose prev and last fields respectively return nil An important point to keep in mind is that when you query the content of say an hbox which in TEX s internal is a horizontal list what you get is the first node of that list you access the rest by sliding from next to next Nodes also have several other fields depending on their types These types are recorded as a number in their id field a numeric value For instance a glue node has id 10 whereas a glyph node has id 37 As long as LuaTEX hasn t reached version 1 though such values might change So in order for our code to last we must use the following workaround the node id function when fed a string denoting a node type returns the associated id number For instance node id glue returns 10 Thus when using symbolic names we can get the right id value regardless of changes in ver sions of LuaTEX Another important field for nodes is subtype which distinguishes between nodes with
9. A self printing Lua code is obviously not what I use this mechanism for It is worthwhile to note that if we can make a self aware late_lua whatsit we can also access the list following this whatsit It is too late to change previous nodes as they were already eaten by shipout and written to the output but one can freely which doesn t mean safely modify the nodes that follow the whatsit Let s start with a more general self conscious late_lua whatsit long def lateluna 1 directlua node write luna node Nluaescapestring 1 directlua luna node function data local self node new node id whatsit node subtype late_lua local n string luna 1 luna n self self data Iuna this return self end luna n data Here is a function that takes a text string font identifier and absolute position as arguments and returns a hori zontal list of glyph nodes local string unicode utf8 function luna text s font id x y local head node new node id glyph head char string byte s 1 head font font id head xoffset pdf h tex sp x head yoffset pdf v tex sp y local this that head for i 2 string len s do Luna my side of the moon that node copy this that char string byte s i this next that that prev this that end head node hpack head head width head height head depth return head end this Now we can t
10. Er is geen bibliographystyle meer Inplaats daarvan worden er opties van het biblatex pakket gebruikt In de citatie ontbreken de haakjes om het jaartal Dit is op te lossen door in plaats van cite het commando textcite te gebruiken Het jaartal in de bibliografie staat op een andere plaats Het omzetten van cite in textcite is vervelend Misschien zijn er nog opties te vinden om de layout meer zoals in natbib te krijgen Het aantal opties in bib latex is echter gigantisch en dat zal dus nog wel wat ex tra zoekwerk kosten Hier is de versie met textcite documentclass article pagestyle empty setlength textwidth 220pt usepackage natbib style authoryear biblatex bibliography bibfile begin document This is a very short article It cites the classical databases book textcite Date2003 printbibliography end document This is a very short article It cites the classical databases book Date 2003 References Date C J 2003 An Introduction to Database Systems 8th ed Reading Massachusetts Addison Wesley Publishing Company Inc Biblatex heeft voor het functioneren eTEX nodig maar dit is tegenwoordig meestal de standaard TEX machine die gebruikt wordt Biblatex is nu op versie 1 0 de vorige versies waren allemaal 0 x dus we mogen aannemen dat het een ze kere volwassenheid heeft bereikt Het is geschreven door Philipp Lehman bekend van de handleiding voor het
11. Luigi Scarso Paul Isambert NAJAAR 2010 37 Three things you can do with LuaTEX that would be extremely painful otherwise Introduction LuaTEX has made some typographic operations so easy one might wonder why it wasn t invented thirty years ago probably because Lua didn t exist then Here I m going to describe three simple features that would require advanced wizardry to do the same with any other engine LuaTgxX allows you to explore some of TEX s most intimate parts with a rather easy programming language and the result is you can quite readily access things that were unreachable before The three issues I m going to address are a Turning lines into rules whose color depends on the line s original stretch or shrink a Underlining a Margin notes that align properly with the text I ll try to explain some of LuaTEX s basic functionality as we encounter these issues but two of them are worth mentioning right now callbacks and nodes First we can control TEX s operations at various stages thanks to callbacks These are points at which we can insert Lua code to modify or enhance TEX s process ing Callbacks range from processing TEX s input buffer e g to accommodate a special encoding to rewriting the paragraph builder and loading OpenType fonts Second we can manipulate lists of nodes To put it simply nodes are the atoms that TEX uses to create pages boxes glyphs glues but also penalties what sits etc
12. XSL Version 1 1 W3C Recommendation Edited by 32 33 34 Anders Berglund December 2006 http www w3 org TR 2006 REC xs111 20061205 W3C XML Path Language XPath 2 0 W3C Recommendation Draft Edited by Anders Berglund Scott Boag Don Chamberlin Mary F Fernandez Michael H Kay Jonathan Robie and J r me Sim on January 2007 http www w3 org TR 2007 WD xpath20 20070123 W3C XQuery 1 0 and XPath 2 0 Functions and Operators W3C Recommendation Edited by Ashok Malhotra Jim Melton and Norman Walsh January 2007 http www w3 org TR 2007 REC xpath functions 20070123 W3C XQuery 1 0 an XML Query Language W3C Recommendation Edited by Scott Boag Don Chamberlin Mary F Fernandez Daniela Florescu Jonathan Robie and J r me Sim on January 2007 http www w3 org TR xquery W3C XSL Transformations XSLT Version 2 0 W3C Recommendation Edited by Michael H Kay January 2007 http www w3 org TR 2007 WD xs1t20 20070123 39 42 W3C XML Schema December 2008 http wwu w3 org XML Schema 43 Larry WIDEN and Chris MIRACLE Doc Sav age Arch Enemy of Evil Fantasticon Press Milwaukee Wisconsin 1993 Notes 1 Let us mention that 2 shows in French how to use LaTEX to put spreadsheets functionalities into action NAJAAR 2010 77 2 As an example of using TEX s language for programming purposes readers interested in putting a sort procedure into action can refe
13. and pocket book but would lead to complicated programming NAJAAR 2010 69 lt xsd schema xmlns xsd http www w3 org 2001 XMLSchema gt lt xsd element name story list gt lt xsd complexType gt lt xsd sequence gt lt xsd element name story maxOccurs unbounded gt lt xsd complexType gt lt xsd sequence gt lt xsd element name title type xsd string gt lt xsd element name pulp minOccurs 0 gt lt xsd complexType gt lt xsd simpleContent gt lt xsd extension base xsd string gt lt xsd attribute ref nb use required gt lt xsd extension gt lt xsd simpleContent gt xsd complexType xsd element lt xsd element name pocket book gt lt xsd complexType gt lt xsd attribute ref nb use required gt lt xsd complexType gt lt xsd element gt lt xsd sequence gt xsd complexType xsd element lt xsd sequence gt lt xsd complexType gt lt xsd element gt xsd attribute name nb type xsd positiveInteger lt xsd schema gt Figure 2 Our organisation expressed in XML Schema Using tools related to XML XSLT producing TEX sources XSLT 41 is the language designed for transforma tions of XML texts By transformations we mean that we can build printed documents as well as online docu ments to be put on the Web from the source file Simple texts are possible too We also can perform some com putation from data stored in the ori
14. our example in order to get Fig 3 s text is given in Fig 6 Like XSLT 2 0 XQuery uses XPath 2 0 expressions and the datatype library provided by XML Schema As we did in XSLT we systematically put type declarations using the as keyword for sake of clarity and for taking as much advantage as possible of XQuery s type checker Such programs using FLWOR expressions are more compact than equivalent ones in XSLT However XQuery is suitable only for generating sim ple texts advanced features like character maps in XSLT are provided by some XQuery processors but are not portable You have to use the replace function 39 8 7 6 3 to deal with TEX s special characters replace s 1 1 substitutes each occurrence of resp 4 by VE Processing Computed Texts NAJAAR 2010 73 declare namespace maps http www ntg nl declare namespace saxon http saxon sf net declare namespace xsd http www w3 org 2001 XMLSchema declare option saxon output omit xml declaration yes declare declare variable eol as xsd string amp xA variable filename as xsd string external declare function maps mk group string seq as xsd string as xsd string meu string seq e if doc available filename then string join for story O as element story in doc filename story list story pulp let pulp nb O as xsd untypedAtomic pulp nb O int as xsd integer pulp nb O string as xs
15. that particular release of the package All further edits will force the creation of a new release with a new revision id and needing new sources Yet another note If you intend to create an executable package you have to be really sure you know what you are doing Creating portable binaries for any platform is far from trivial Paraphrasing Norbert Preining from the TLContrib mailing list If you have NO experience with compiling preparing binaries for various platforms distributing etc JUST DO NOT GO THERE Macro packages are much easier for those you only need a good understanding of how the TDS works Package editing After the initial New package wizard screen or after pressing Edit in the your package list for pre existing packages you will be presented with a fairly large edit screen During the initial TLContrib package creation process if the package is updating an existing TEX Live pack age certain fields will have been filled in automatically from the TEX Live package database Otherwise you will have to fill in everything yourself Title This is the human readable name of your package Description This is a description in a few sentences of what the package does Package type Even though the drop down is long really there are only two choices in the drop down A package is either a Macro package or a Executable package The distinction is important because the required package source structure i
16. this whatsit and put it into the list on our own risk without the use of pdfrefobj def shipout setbox256 box voidbex afterassignment doshipout setbox256 def doshipout ifvoid256 expandafter aftergroup fi lunashipout def lunashipout directluaf luna luna or luna tail node tail tex box 256 list tex shipout 256 latelua local data lt lt The Object gt gt local ref node new node id whatsit node subtype pdf_refobj ref objnum pdf obj data local tail luna tail tail next ref ref prev tail luna tail ref for other lateluas In this example before every shipout the very last item of the page list is saved in luna tail During shipout all code snippets from late_lua whatsits may create a pdf_refobj node and insert it just after the page tail which ensures that the LuaTEX engine will write them out Self conscious latelua If every latelua code chunk may access the page list tail why not to give it access to the late_lua whatsit node to which this code is linked Here is the conceptual representation of a whatsit that contains Lua code that can access the whatsit itself def lateluna 1 directlua Pawet Jackowski local self node new node id whatsit node subtype late_lua self data Nluaescapestring 1 luna this self node write self 3 lateluna print luna this data Beyond the page builder
17. 3 5 4 1 5 1 4 exercises answers Figure 1 Lorien s challenge A few pages of the result are shown in figure 1 In the ConTEXt distribution more advanced version can be found in s edu 1 cld as I was also asked to generate mul tiplication and table exercises I also had to make sure that there were no duplicates on a page as she complained that was not good There a set of sheets is generated with moduledata educational calculus generate name Bram Otten fontsize 12pt columns 2 run I method bin_add_and_subtract maxa 8 maxb 8 method bin_add_and_subtract maxa 16 maxb 16 method bin_add_and_subtract maxa 32 maxb 32 method bin_add_and_subtract maxa 64 maxb 64 method bin_add_and_subtract maxa 128 maxb 128 3 Graphics If you are familiar with ConTEXt which by now probably is the case you will have noticed that it integrates the MetaPost graphic subsystem Drawing a graphic is not that complex context startMPcode context draw fullcircle scaled 1cm withpen pencircle scaled 1mm withcolor 5white Typesetting in Lua using Lua TEX NAJAAR 2010 65 dashed dashpattern on 2mm off 2mm Jd context stopMPcode We get a gray dashed circle rendered with an one millimeter thick line pu MN Va So we just use the regular commands and pass the drawing code as strings Although MetaPost is a rather normal language an
18. 4 3 6 5 1 10 6 4 7 2 7 3 10 3 7 2 5 7 3 10 0 3 7 7 1 4 2 6 6 7 1 6 4 2 2 6 6 12 7 4 3 75 1 7 7 4 3 3 7 10 1 72 8 6 3 10 3 5 3 6 3 3 10 3 7 5 3 2 5 1l 3 2 9 10 5 1 4 3 2 1 9 10 19 8 2 9 4 0 7 8 2 6 9 4 5 W 7 3 3 2 8 5 9 6 3 2 5 8 5 13 9 6 15 7 7 8 6 10 3 7 7 4 8 6 2 10 3 7 5 8 44 55 10 8 5 8 3 4 5 9 10 8 18 10 1 6 5 7 1s 0 1 9 6 5 1 7 12 6 10 6 8 1 7 3 0 6 4 8 1 7 7 3 10 8 2 2 6 9 10 8 2 6 2 6 8 9 10 19 8 8 4 3 3 2 8 8 16 4 3 1 3 2 1 6 45 44 l 1 l 6 4 10 44 12 5 1 12 2 W 7 6 1 5 35 W 7 17 6 1 5 5 3 8 1 75 1 5 8 45 1 7 8 1 5 6 8 4 12 7 7 3 55 10 4 7 7 4 3 5 8 0 4 6 8 2 W 7 5 4 8 2 6 10 7 17 5 42 1 8 6 4 3 9 1 8 6 2 4 32 7 9 1 8 10 6 4 2 6 9 10 6 4 4 2 2 6 9 15 8 1 7 6 6 9 8 1l 7 7 6 13 6 9 15 6 4 7 3 5 25 6 4 10 7 3 4 5 2 7 3 l 5 25 1 l 3 12 4 5 2 7 1 12 2 4 6 8 5 1 7 4 6 10 8 5 3 1 72 8 W 7 6 5 5 9 W 7 17 6 5 1 5 9 4 1 10 3 10 6 4 1 10 11 3 10 13 6 4 2 10 3 6 3 4 3 10 3 13 6 3 3 4 3 7 0 7 6 4 4 8 W 7 3 6 4 10 4 B 12 7 3 3 45 1 10 7 3 10 34 4 7 1 10 11 24 9 6 6 5 l 2 9 u 6 6 12 5 l 6 8 5 5 4 5 1 8 5
19. APA American Psychological Association De implementator Philip Kime schrijft dat het nogal een klus was omdat de layoutregels van de APA zo n 60 pagina s beslaan en het hem niet gelukt is om ze alle maal te implementeren Er zijn ook een groot aantal localisaties aanwezig voor degenen in andere landen die een vergelijkbare stijl moeten gebruiken Alleen werkt deze stijl op dit moment niet met de nieuwste versie van biblatex biblatex chicago Biblatex chicago bevat stijlen volgens het beroemde Chicago Manual of Style Deze kent twee stijlen een auteur datum stijl voor gebruik in de natuurweten schappen en een voetnoot stijl voor gebruik in de hu maniora Het pakket is geschreven door David Fussner Het verkeert nog in het b tastadium maar is al erg uit 12 MAPS 41 gebreid De handleiding beslaat 95 pagina s Bij dit pakket is het mogelijk om in plaats van de usepackage biblatex met de nodige opties het pakket zelf aan te roepen door middel van usepackage authordate biblatex chicago of Nusepackage notes biblatex chicago Op deze manier worden meer opties automatisch gezet dan met de aanroep van het pakket biblatex De optie authordate heeft nog het meeste weg van wat we in het eerste voorbeeld met natbib en de tradi tionele BibTEX route hebben geproduceerd Er is zelfs een optie natbib die meegegeven kan worden De optie notes lijkt nog het meest op de stijl footnote dw die we
20. Kees van der Laan 79 NTG Najaarsbijeenkomst 2010 Frans Goddijn 91 Taco Hoekwater Redactioneel Laat ik beginnen met iedereen een Gelukkig en productief 2011 toe te wensen namens de Maps redactie en het NTG bestuur Tegen de tijd dat je dit leest zou het namelijk wel eens voorbij half januari kunnen zijn Met andere woor den deze najaars Maps is te laat Ik zou graag willen kunnen zeggen dat het aan weerbarstige auteurs lag of dat de redactie onderbezet is of dat de ConTEXt beta die ik gebruik zorgde voor onbetrouwbare uitvoer waardoor ik op Hans moest wachten voor een nieuwe beta of aan vertraging bij TNT post vanwege de stakin gen of dat de drukker het veel te druk had vanwege de eindejaars rush maar helaas Al voornoemde zaken zijn waar maar de hoofdreden is dat ik het veel te druk heb gehad met andere zaken om me op de Maps te kunnen concentreren En dat is niet voor het eerst dus hierbij mijn welgemeende excuses voor de veroorzaak te vertraging En als ik me dan toch aan het verontschuldigen ben laat ik dan ook maar meteen schuld bekennen over de vreselijk lelijke inhoudsopgave op de achterkant van Maps 40 Om eerlijk te zijn weet ik nog steeds niet wat er fout is gegaan daar maar ik beloof dat de inhoudsopgave van deze Maps met argusogen is bekeken Nu ik toch over bekijken ben begonnen Siep Kroo nenberg heeft eind van het jaar de stylesheet van de NTG website onder handen genomen Wijzelf zijn erg tevreden ov
21. Lorien was at the office and wanted to know what I was doing As I knew she was practicing calculus at school I wrote a quick and dirty script to generate sheets with exercises The most impressive part was that the answers were included It was a rather braindead bit of Lua written in a few minutes but the weeks after I ended up running it a few more times for her and her friends every time a bit more difficult and also using different calculus It was that script that made me decide to extend the basic cld manual into this more extensive document We generate three columns of exercises Each exercise is a row in a table The last argument to the function determines if answers are shown local random math random local function ForLorien n maxa maxb answers context startcolumns n 3 context starttabulate r c r c r for i 1 n do local sign random 0 1 gt 0 5 local a b random 1 maxa or 99 random 1 max or maxb or 99 if b gt a and not sign then a b b a end context NC context a Typesetting in Lua using Lua TEX context NC context mathematics sign and or context NC context b context NC context context NC context answers and sign and atb or a b context NC context NR end context stoptabulate context stopcolumns context page end This is a typical example of where it s more convenient to write the code in Lua that in TEX s macro language As
22. XSL FO using a TEX like typesetting engine Such an implementation has begun Passive TEX 4 but this project is presently stalled We think that pro cessing XSL FO could re use the experience accumulated by ATEX developers even if syntaxes are very differ ent34 The second direction would be the definition and implementation of an output mode of XSLT suitable for ATEX some additional services could be performed for example checking that braces and environments are balanced Such an output mode already exists in nbst the language of bibliography styles close to XSLT and used by MIBIBTEX 6 11 but it concerns only the way to process LaTEX s special characters If the method attribute of the nbst output element is set to text the result of NAJAAR 2010 75 Nenablemode ds pulp startxmlsetups xml ds base xmlsetsetup 1 story listlstoryltitlelpulplpocket book xml ds stopxmlsetups xmlregisterdocumentsetup ds xm1 ds base startxmlsetups xml ds story list Nxmlresetsorteristory xmlfilter 1 story command xml story list getkeys subject sortkeys xmlshowsorter story blank xmlsortentries story Nxmlflushsorteristory xml story list flush stopxmlsetups startxmlsetups xml story list getkeys xmladdsortentry story 1 xmlattribute 1 pulp nb stopxmlsetups startxmlsetups xml story list flush startitemize xmlfirst 1 stopitemize stopxmlsetups startxmlsetups xml ds s
23. Xs sub str pos 30 pos end local grammar texcode texbody definition braced i a F HF F FF E converter pushlocal startcode spaces name spaces declaration 1 newline space V texbody stopcode poplocal V definition identifier V braced 1 stopcode y a pushlocal definer escapedname declaration 1 leftbrace 0 V braced poplocal leftbrace x V definition identifier VC texcode VC braced nobrace NAJAAR 2010 17 18 MAPS 41 Hans Hagen x rightbrace 1 the 1 catches errors rightbrace Cmt always matcherror pattern V definition V texcode anything converter V pattern 1 local parser Cs grammar local checker P 1 newline P macros 0 x P macros space x P space x C patterns letter 1 maybe namespace local macros resolvers macros macros function macros preprocessed str return lpegmatch parser str end function macros convertfile oldname newname beware no testing on oldname newname local data resolvers loadtexfile oldname data interfaces preprocessed data or io savedata newname data end function macros version data return lpegmatch checker data end function macros processmkvi str filename if filename and file suffix filename mkvi or lpegmatch checker str
24. a consequence setting up the page also happens in Lua context setupbodyfont palatino 1l4pt context setuplayout backspace 2cm topspace 2cm header lem footer Qcm height middle width middle At this point we need to generate the document There is a pitfall here we need to use the same random number for the exercises and the answers so we freeze and defrost it Functions in the commands namespace implement functionality that is used at the TEX end but better can be done in Lua than in TEX macro code Of course these functions can also be used at the Lua end context starttext local n 120 commands freezerandomseed ForLorien n 10 10 ForLorien n 20 20 ForLorien n 30 30 ForLorien n 40 40 ForLorien n 50 50 commands defrostrandomseed ForLorien n 10 10 true ForLorien n 20 20 true ForLorien n 30 30 true ForLorien n 40 40 true ForLorien n 50 50 true context stoptext NAJAAR 2010 63 64 MAPS 41 Hans Hagen 1 6 8 5 10 45 9 10 8 5 3 W 4 6 9 10 19 4 2 5 1s 7 3 4 2 6 5 1 4 7 3 4 8 2 10 8 5 45 8 2 6 10 8 18 5 42 1 44752 9 B 5 45 44 720 9 8 17 5 42 9 5 l 9 3 8 9 5 l 6 9 3 6 8 9 17 9 B 5 1s 5 6 9 8 1 5 1 4 5 6 11 8 3 6 1s 8 45 8 3 11 6 1 5 8 4 12 6 6 7 78 2 15 6 6 0 7 7214 2 1 1 7 4 6 5 0 6 7
25. among these schema languages can be found in 36 9 Readers interested in more details about XML namespaces can consult 32 pp 41 45 10 This example seems to us to be pertinent because there is no order better than others the original order is based on pulps but as mentioned above some stories are unpublished as pulps whereas sorting stories according to pocket books order allows us to sort all the stories but this is not really chronological 11 eXtensible Stylesheet Language Transformations Intro ductions to this language have been given in some BachoTEX conferences held in Poland 12 13 15 12 A study of XPath 2 0 s and XSLT 2 0 s new features in comparison with XPath 1 0 and XSLT 1 0 can be found in 15 13 In addition let us mention that when an XML text is processed by XSLT 2 0 the information put into a DTD or an XML Schema text can be exploited 23 p 58 That is not true about other schema languages 14 In text mode LaTEX 2e s modern versions provide the Ntextbackslash command 30 Table 7 33 15 If we name this character by introducing a variable by means of an xsl variable element as we did in Fig 4 for the end of line character we cannot use this variable s value within the character attribute of the xsl output character element 16 Engines are not formats a format is a set of pre loaded definitions based on primitives of a TEX like engine whereas an engine is TEX or
26. be embedded the font format cannot be OpenType JavaScript programs are not permitted at all even if they don t modify the document in any way as for example a calculator Ten years ago it was very important to guarantee that the document would always be printed as intended nowa days screen is slowly replacing paper and animations play a fundamental role PDF A 1 is good for paper but less than optimal for electronic paper PDF A la in Con TEXt MkIV Given that it is still under heavy development ConTEXt 32 MAPS 41 MkIV has the opportunity to be developed on two fronts the low level luaTEX CWEB code and Lua primitives and the high level macros that build the format itself One of this year s results is the implemen tation of tagged PDF the Adobe document markup language for PDF documents and the development of color macros for the PDF X specifications As a conse quence it was possible to use these results to test some real code for producing PDF A 1a compliant documents Let s start with an example explained step by step Debug enabletrackers backend format backend variables For PDF A setupbackend format pdf a 1a 2005 profile default_cmyk icc default_rgb icc default_gray icc intent ISO coated v2 300 letterpercent space ECI J Tagged PDF method auto gt default tags by Adobe setupstructure state start method auto definecolor Cyan c 1 0 m 0 0 y 0 0 k
27. bla xxx stopluacode This results in Kek bizi Here the first call results in three x being passed and 1 picks up the first token The second call to bla gets xxx passed so here 1 gets the triplet In practice you will seldom need the direct interface In ConTEXt for historical reasons combinations have the following syntax startcombination optional specification like 2 3 framed content one caption one framed content two caption two stopcombination You can also say startcombination combination framed content one caption one combination framed content two caption two stopcombination When coded in Lua we can feed the first variant as follows context startcombination context direct one two context direct one two context stopcombination To give you an idea what this looks like we render it one one two two NAJAAR 2010 53 54 MAPS 41 Hans Hagen So the direct function is basically a no op and results in nothing by itself Only arguments are passed Equivalent but a bit more ugly looking is context startcombination context false one two context false one two context stopcombination Catcodes If you are familiar with TEX s inner working you will know that characters can have special meanings This meaning is determined by the characters catcode context x 1 This gives x 1 because
28. but this is dangerous because we don t know if it s correct for the image and also in this way all the rgb color spaces of others images are associated to this specific profile To remedy this situation I present here a practical solution that relies on the MagickWand suite which is available for free for Windows Linux and Mac plat forms The first step is to verify if the image has a profile gt gm identify verbose rgb icc srgb jpg Profile color 3144 bytes 34 MAPS 41 The second step is to save the profile gt gm convert rgb icc sRGB_v4_ICC jpg sRGB icc and the last step is to build a XObject with the appro priate color space This is a bit tricky but fundamen tally we mimic the behavior of luatex with ConTEXt MkIV I will show only an example for a jpeg image with a DeviceRGB color space rgb icc srgb pdf pdfminorversion4 starttext startTEXpage startluacode local a img scan filename rgb icc srgb jpg tex sprint tex ctxcatcodes string format startfoundexternalfigure ssp ssp a width a height local icc_ref pdf immediateobj streamfile srgb icc Alternate DeviceRGB n Filter FlateDecode n N 3 local icc_dict_ref pdf immediateobj string format ICCBased d R J n icc_ref a img new filename rgb icc srgb jpg colorspace icc_dict_ref a img immediatewrite a node write img node a tex sprint tex ctxcatcodes stopfoundexter
29. eerder gezien hebben Er zijn ook localisaties voor Duits en Frans documentclass article pagestyle empty setlength textwidth 220pt usepackage natbib authordate biblatex chicago bibliography bibfile begin document This is a very short article It cites the classical databases book textcite Date2003 printbibliography end document This is a very short article It cites the classical databases book Date 2003 References Date C J 2003 An introduction to database systems 8th ed Reading Massachusetts Addison Wesley Publishing Company Inc biblatex historian Deze stijl geschreven door Sander Glibof is een aange paste versie van de chicago stijl voor historici omdat deze vaak voetnoten gebruiken om te refereren niet alleen naar boeken en artikelen maar ook naar her drukken correspondentie archieven ongepubliceerde manuscripten en dergelijke Het wordt voornamelijk gebruikt met voetnoten als referenties maar er zijn ook speciale commando s om referenties in voetnoten te gebruiken De stijl wordt beschreven in het boek van Kate L Piet van Oostrum Turabian A Manual for Writers of Research Papers The ses and Dissertations Chicago Style for Students and Researchers 7th ed Chicago and London University of Chicago Press 2007 De stijl is erg uitgebreid de handleiding heeft 84 pagina s waarvan een groot deel bestaat uit de bespreking van de verschillende soorten doc
30. g in 7 A 1 for LaATEX butit seems to us that none is actually used XSLT producing XSL FO texts Since deriving XML texts by means of XSLT provides a better check level about syntax an alternative idea is to get XSL FO 8 37 texts Such texts use an XML like syntax that aims to describe high quality print outputs As shown in 16 there is some similarity between LaTEX and XSL FO the latter providing of course more systematic markup This language is verbose but it is not devoted to direct use XSL FO texts usually result from applying an XSLT stylesheet The use of several namespaces usually denoted by the prefixes xsl and fo clearly distinguish elements belong ing to XSLT and XSL FO This approach s advantage is clear generated texts are well formed However XSL FO lacks document classes as in LaTEX Some elements allow the descrip tion of page models but end users are entirely responsi ble for this definition XSL FO provides much expressive power about placement of blocks but is very basic on other points For example let us consider footnotes end users are responsible of choosing each footnote Processing Computed Texts NAJAAR 2010 71 lt DOCTYPE stylesheet lt ENTITY start command amp xE000 gt lt ENTITY start group amp xE001 gt lt ENTITY end group amp xE002 gt gt lt xsl stylesheet version 2 0 id pulps plus xmlns maps http www ntg nl xmln
31. including all revisions of it Both links show a confirmation screen first Remote revision creation advanced usage Once a package has been created there must at least one revision record present already and under the conditions that it has a source method of HTTP URL SVN URL or GIT URL it is possible to submit a new revision by fetching a special URL from a remote location or script Using this method there is no need to be logged in at all The URL template looks like this http tlcontrib metatex org egi bin package cgi action notify key lt key gt check lt md5 gt version lt version gt Please note that version is preceded by a question mark but everything else is separated by slashes and of course the actual URL should be a single line without any spaces All three fields are required The three special fields have to be filled in like this lt key gt This is the package Id of the package Let s use luatex i386 linux as example value for lt key gt lt md5 gt This is a constructed check sum created as fol lows it is the hexadecimal representation of the md5 check sum of the string created by combining your userid your password and the new version string separated by slashes For example let s assume that your userid is taco and your password is test and that the new release that you are trying to create has version 0 64 9 Taco Hoekwater On a Unix command line the check sum can be ca
32. installeren van LaTEX fonts De handleiding van biblatex is zeer uitgebreid ongeveer 200 pagina s Het zou wel handig zijn als er een mini handleiding zou zijn voor mensen die alleen maar een bibliografie wil Nieuws van CTAN len gebruiken en niet zelf bibliografische stijlen willen ontwikkelen Er zijn ook een aantal uitbreidingspakketten voor biblatex Deze worden niet met usepackage gebruikt maar door middel van opties in biblatex biblatex dw Biblatex dw is een pakket geschreven door Dominik Wassenhoven in eerste instantie voor eigen gebruik Het implementeert de citatie stijl die gebruikelijk is in de humaniora In feite zijn er twee stijlen in verwerkt Een stijl speciaal voor verwijzingen in voetnoten footnote dw Hierbij wordt de referentie als voetnoot gezet met dezelfde informatie die ook in de bibliografie staat usepackage style footnote dw biblatex 1C J Date An Introduction to Database Systems 8th ed Reading Massachusetts 2003 Auteur titel stijl authortitle dw usepackage style authortitle dw biblatex Zie het voorbeeld hierna This is a very short article It cites the classical databases book Date An Introduction to Database Systems References Date C J An Introduction to Database Systems 8th ed Reading Massachusetts 2003 Beide stijlen zijn ook mogelijk met het basispakket biblatex maar biblatex dw heeft veel meer opties biblatex chem Biblatex chem bevat 4 stijlen v
33. into three categories semantic formal and WYSIWYG The semantic formats for example HTML and XML are notoriously machine readable Text can easily be highlighted copied pasted processed con verted etc Yet the largest reading software for se mantic formats is the web browser Not a single web browser seems to have bothered to address line break ing with any sort of seriousness The ubiquity of HTML tied with its semantic processibility means that its importance cannot be ignored as an output format At this point not producing an HTML version of a doc ument that one wishes to see widely read is tantamount to removing such widespread reading as an achievable goal To top off the complexity of the situation the machine readability of a semantic document is offset by a distinct reduction of human readability Asking anyone to write a thesis directly in XML for instance is going to be a non starter The second class of text are those defined by their formal nature This is not referring to some but toned down attitude but rather to an opposite direc tionality in terms of how the text is presented In semantic markup the format is not itself responsible for how a display program arranges the text rather the display program digests the text in light of its semantic qualities and then lays that text out according to algorithms that can and do vary between programs The easiest way to describe this approach is that it is
34. know that there is a command that combines both features context This is context style style bold color red important context But that is still not convenient when we have to do that often So you can wrap the style switch in a function local function mycommands important str context style style bold color red str end context This is mycommands important important context and mycommands important this context too 62 MAPS 41 Hans Hagen Or you can setup a named style context setupstyle important style bold color red context This is context style important important context and context style important this context too Or even define one context definestyle important style bold color red context This is context important important context and context important this context too This last solution is especially handy for more complex cases context definestyle important style bold color red context This is context startimportant context inframed important context stopimportant context and context important this context too This is important and this too A complete example One day my 6 year old niece
35. manual The separation of any of these four components would have hurt IEX significantly If I had not participated fully in all these activities literally hundreds of improvements would never have been made because I would never have thought of them or perceived why they were important But a system cannot be successful if it is too strongly influenced by a single person Once the initial design is complete and fairly robust the real test begins as people with many different viewpoints undertake their own experiments The function is delayed till the framed command is executed If your applications use such calls a lot you can of course encapsulate this ugliness mycommands mycommands or function mycommands framed_input filename context framed frame on align middle ky function context input filename end end mycommands framed_input knuth Of course you can nest function calls context placefigure caption function context framed frame on align middle Jy function context input knuth end end Or you can use a more indirect method function text context framed frame on align middle function context input knuth end end context placefigure none function text end Typesetting in Lua using Lua TEX You can develop your own style and libraries just like you do with regular Lua code How we can a
36. not check the actual contents of any of the files and of course it can not test for every possible problem Package transfer It is possible for the maintainer of a package to transfer the package to another user completely To do so follow the Share link in your package list See the help text in that form for details Package sharing It is also possible for the maintainer of a package to share the package maintenance with other users To set up package sharing for a package you main tain follow the Share link in your package list See the help text in that form for details When someone else has shared a package with you then you will see new entries in your package list These will have the user id of the actual package 8 MAPS 41 maintainer added after the Date field You can edit such packages and thus create new revisions but the new revisions will become property of the actual package maintainer In other words a package can only have one actual maintainer and that maintainer is responsible for all revisions of the package However the maintainer can allow other users to help with the actual creation of new revisions Package deletion In the list of your packages and in the view screen of one of your package releases there are two links that delete items Del Delete revision This link deletes a single revision of a package Delete package in view screen only This link removes a whole package completely
37. of Software is available at http mastersofmedia hum uva nl 2010 09 17 grammars of process agency collective becoming and the organization of software 2 2 Pandoc is the only text format translation tool that cur rently translates into CONTEXT It is written by John MacFar lene and is available at http johnmacfarlane net pandoc 3 For an easy example of this just set text align justify in the CSS for lt p gt tags in an HTML document 4 A clearly notable exception to this is Adobe InDesign and other WYSIWYG Desktop Publishing tools in which line breaking must be taken more seriously In terms of end user level document creation however the statement that linebreaking is lacking in WYSIWYG stands 5 Markdown http daringfireball net projects markdown 6 Perl 6 http perl6 org For an example of Perl 6 gram mars see http perl6advent wordpress com 2009 12 21 day 21 grammars and actions from the Perl 6 Advent Calen dar a great place to start learning about the potentials of this language 7 WMD The WYSIYWM Markdown Editor http wmd editor com 8 YAML http yaml org John C Haltiwanger john haltiwanger gmail com Hans Hagen NAJAAR 2010 49 Typesetting in Lua using LuaIpx Introduction Sometimes you hear folks complain about the TEX input language ie the back slashed commands that determine your output Of course when alternatives are be ing discussed every one has a favourite
38. other functionalities being put into action using TEX like commands As in ConTEXt the layout is controlled by set up commands start setup stop setup for example title elements contents are just dis played processing pulp elements displays the num ber or the title depending on a mode then our XML file is processed atomically by means of the xmlprocessfile command This approach is promis ing but let us recall that LuaTEX and ConTEXt MkIV have not yet reached stable state that is planned for the year 2012 Another important drawback as shown by the examples using the xmlfilter command in Fig 8 this command uses path expressions very close to XPath expressions but not identical For example command used to connect a selected item to the set up command that processes it obviously does not belong to XPath On the contrary some XPath expressions are not recognised even if simple paths are processed Some tricks may be used as workarounds but we per sonally think that complete compatibility with XPath should be attained Conclusion If we sum up the approaches shown throughout this article those that seem suitable are XQuery for sim ple examples XSLT for more ambitious ones provided that Version 2 0 is used The use of LuaTEX could be interesting in a near future too However we think that there are two directions that should be explored The first would be a modern imple mentation of
39. pulp title string title processed let footnote marker sosofo literal footnotemark sosofo make superscript footnote marker sosofo make sequence literal pulp title string footnotemark sosofo make page footnote footnotemark sosofo literal Book s title of pulp pulp processed literal title processed element title process children trim element pulp literal attribute string nb define space literal literal define make superscript let shift factor 0 4 size factor 0 6 lambda sosofo 0 make sequence font size inherited font size size factor position point shift inherited font size shift factor sosofo 0 define string null string 0 define list stable sort list O rel 2 key f1 33 Sorts list O according to the order relation rel 2 The argument key f1 gives a key for each element kes lt style specification body gt lt style specification gt lt style sheet gt Figure 7 DSSSL stylesheet generating a text to be printed Processing Computed Texts text is left to the Python functions dealing with XML texts and successive results are sent to TEX in turn LuaTEX 9 is able to call functions written using Lua 20 On another point this TEX engine can pro cess texts using XML like syntax as shown in 10 Fig 8 gives an implementation of our example in ConTEXt MkIV it uses Lua to define an interface with sorting functions the
40. same thing as traversing the list but we ll sometimes want to skip nodes so we ll set the next one by hand We scan nodes and once we ve found one with the right value for the attribute and which is not one of the glues above we create our rule with arbitrary dimensions tex sp turns a dimen sion expressed as a string into scaled points the native measure for Lua code How wide should the rule be The length of the material starting at the current node up to the last node with the right attribute To find this last node we use the following loop and then retrieve the length of that material via node dimensions which returns the material s length when it is typeset with the text line s glue setting We use end_node next because the function actually measures up to its last argument s prev node local end_node item while end_node next and good_item end_node next and node has_attribute end_node next 100 do end_node end_node next end item_line width node dimensions ratio sign order item end_node next Finally we insert the line into the list That s pretty simple we insert a negative kern with subtype 1 i e a handmade kern not a font kern as long as the line after the last underlined node followed by the line itself This is equivalent to using llap in plain TEX The end of the code sets the next node to be analyzed including the false part of the overall conditional local item_kern item_kern ke
41. the loop we replace the line s content with a sequence of three nodes color push a rule and color pop local rule node new RULE rule width line width local p line list line list node copy color_push node flush list p node insert after line list line list rule node insert after line list node tail line list node copy color pop end Whatis done here is first we create a rule whose width is the same as the original line s we could have created this rule beforehand with a width equal to Vhsize but this way we accommodate changing line widths Then we set the line s list as a copy of color push we use a copy since we need that node for each line and then we insert the rule node and a copy of color pop The first argument to node insert after is the list denoted by its first node where we perform the insertion the second one is the node in that list after which the insertion is performed and the last one is the inserted node node tail returns the last node of its argument Three things you can do with LuaTEX so the third node insert after inserts at the end of the list The story with p is this we retrieve the line s con tent before replacing it so we can erase it from TEX s memory it has no effect on the output Finally and most importantly we return the mu tated list for TEX to continue its operations and close the function return head end Now to use the function we r
42. u hy uniformdeviate v rgb 8x uniformdeviate 2 red 2x uniformdeviate 2 green 7 uniformdeviate 2 xblue la Mondrian draw hx hy hxtuniformdeviate size hy withcolor rgb endfor p r v u v u cycle shifted 2pw 2pw p o 5u v right u 5v down 5u left 5v up cycle shifted u 4pw 2pw p d 5u v u 5v 5u 5v cycle shifted 2u 6pw 2pw currentpicture currentpicture shifted 2pw pw clip currentpicture to p r pic o currentpicture shifted u 4pw 0 clip pic o to p o clip more pic d currentpicture shifted 2u 6pw 0 clip pic d to p d clip even more addto currentpicture also pic o add shifted pictures addto currentpicture also pic d pickup pencircle scaled pw linecap rounded drawoptions withcolor 8xred 2xgreen 7xblue draw p r draw p o draw p d addto currentpicture also signature endfig end I reused this program for generating personalized presents several times but I am happier with the PostScript operator given below When the picture was for a man I copied the Square or the Lozenge and when it is for a woman I copied the Oval Frame the picture in a physical frame and ready it is apart from a wrap around paper Note that all three frames have the same pattern the pattern is clipped by frame variations Subtle is the printing of the signature outside the clipping area PostScript
43. which is used as the basis of ISO 19005 1 PDF A attempts to maximize device indepen dence self containment self documentation The constraints include audio and video content are forbidden JavaScript and executable file launches are prohibited All fonts must be embedded and also must be legally embeddable for unlimited universal rendering colorspaces specified in a device independent manner encryption is disal lowed use of standards based metadata is man dated The PDF A 1 standard defines two levels of con formance conformance level A satisfies all re quirements in the specification level B is a lower level of conformance encompassing the require ments of this part of ISO 19005 regarding the vi sual appearance of electronic documents but not their structural or semantic properties In essence the standard wants to ensure that every typographic element from the low level character to the high level logical structure is unambiguously de fined and unchangeable and it does it achieves its purpose every character must be identified by a Unicode id which is an international standard every color must be device independent by means of a color profile or output intent there must be precise meta data informations for classifications and the document must have a logical structure described by a possible ad hoc markup language Unfortunately the PDF version 1 4 is quite old an imations and 3D pictures cannot
44. you go the reverse way you don t get what you might expect tex toks Nframed oeps If we now say the toks we will get Don t get framed as all tokens are consid ered to be letters Node lists If you re not deep into TEX you will never feel the need to manipulate nodelists yourself but you might want to flush boxes As an example we put something in box zero one of the scratch boxes setbox hbox Don t get inframed framed At the TEX end you can flush this box box or take a copy copy At the Lua end you would do context copy context direct or context copy false Typesetting in Lua using Lua TEX NAJAAR 2010 61 but this works as well context node copy list tex box 0 So we get Don t get framed If you do context tex box you also need to make sure that the box is freed but let s not go into those details now Styles Say that you want to typeset a word in a bold font You can do that this way context This is context bold important context Now imagine that you want this important word to be in red too As we have a nested command we end up with a nested call context This is context bold function context color red important end context or context This is context bold context delayed color red 3 important context In that case it s good to
45. 0 0 starttext startchapter title Test startparagraph input tufte Some ConTeXt env are already mapped colors color red OK color Cyan OK figures Nexternalfigure rgb icc srgb jpg width 0 4 textwidth stopparagraph Natural tables bTABLE bTR bTD 1 eTD bTD 2 eTD eTR bTR NbTD nx 2 3 eTD eTR eTABLE stopchapter stoptext As usual the file is processed with gt context test tex and it doesn t hurt to enable some debug information with enabletrackers backend format Luigi Scarso backend variables Enable the PDF A la To enable PDF A 1a we must setup the backend with the appropriate variant of PDF A From the very beginning ConTEXt has had a backend system that permits to use almost the same macro format for different outputs i e DVI and PDF and with luaTEX this system is increasingly enhanced as we ll see later on With format pdf a la 2005 we select the la variant of PDF A standard and the label is mandatory because it also puts some default meta data into the output see lpdf pda xm1 a complete list of formats is currently in lpdf fmt lua and also as a Lua table lpdf formats Next comes the colors part and we must pay atten tion here The key concept is every color must be independent of any device Usually in a PDF we have two sources for colors the colors specified by the author e g something like Ndefinecolor orange r 1 0 g 0 5 b 0 0
46. 1 and the images The most used color spaces DeviceGray DeviceRGB DeviceCMYK are device dependent because the reproduction of a color from these color spaces depends on the particular output device and the real output devices are all different due both to the different nature screen vs printer for example and different technologies CRT vs LCD screen or inkjet vs laser printer for example Every device can be classified by means of a color profile which maps an input color rgb cmyk or gray to an independent color space such maps ensure that each device will correctly reproduce the color and also the independent color space permits to compare colors from different color spaces With prof ile default cmyk icc default rgb icc default gray icc we associate all the document colors with the corre sponding color profile by mean of a filename the file colorprofiles xml has a list of predefined profiles Be careful here it s wrong to associate a rgb color space with a cmyk profile and not all profiles are good especially those for printing Moreover PDF A 1a allows only profiles having version 3 or below There is a second way to specify colors and it s a bit complicated We must specify that all the colors without profile are intended to be used with a common output profile i e we must impose an output intent this is the meaning of PDF A la in ConTEXt MkIV intent ISO coated v2 300 letterpercent space ECI
47. 22 MAPS 41 Taco Hoekwater amp Hartmut Henkel a Similarly pdfrefximage width lt dimen gt height lt dimen gt depth lt dimen gt lt imageref gt overrules settings from pdfximage for this image only a The following obsolete pdf IEX primitives have been removed pdfoptionalwaysusepdfpagebox pdfoptionpdfinclusionerrorlevel pdfforcepagebox pdfmovechars These were already deprecated in pdfTpx itself Lua table extensions In most of the Lua tables that LuaTEX provides only small changes have taken place so they do not deserve their own subsections There is a new callback process_output_buffer for post processing of write text to a file The callbacks hpack_filter vpack_filter and pre_output_filter pass on an ex tra string argument for the current direction fontloader open previously cleared some of the font name strings during load that it should not do The new function font id tenrm returns the internal id number for that font It takes a bare control sequence name as argument a The os name variable now knows about cygwin and kfreebsd a lfs readlink file returns the content of a symbolic link unix only This extension is intended for use in texlua scripts lfs shortname file returns the short FAT name of a file windows only This extension is intended for use in texlua scripts a kpse version returns the kpathsea version string a kpse lookup offers a search int
48. And now the flickering of a light a pallor emerging from the darkness as though lit by a candle a candle guttering in the cold wind a forgotten candle hid and found again casting its doubtful luster on this faint white plane now visible now lost again in the tenebrous absences behind the eye And still the hushing plaint undeterred by light plying its fricatives like a persistent woe ful wind the echo of woe affanato piangevole a piangevole wind rising in the fluttering night through its perfect primes lamenting the beau tiful princess become an unclean widow an emergence from C a titular C tentative and parenthetical the widow then weeping sore in the night the candle searching the pale ex panse for form for the suggestion of form a balm for the anxious eye weeping she weepeth And now the flickering of a light a pallor emerging from the darkness as though lit by a candle a candle guttering in the cold wind a forgotten candle hid and found again casting its doubtful luster on this faint white plane now visible now lost again in the tenebrous absences behind the eye And still the hushing plaint undeterred by light plying its fricatives like a persistent woeful wind the echo of woe affanato piangevole a piangevole wind rising in the fluttering night through its perfect primes lamenting the beautiful princess become an unclean widow an emergence from C a titular C tentative and parenthetical the w
49. EX Live as an easy way to install TEX This distribution provides a comprehen sive TEX system with binaries for most flavors of Unix including GNU Linux and also Windows It includes all the major TgX related programs macro packages and fonts that are free software including support for many languages around the world The current version is TEX Live 2010 TEX Live is distributed on DVD by most of the local TEX user groups but it also allows for continuous pack age updates over the Internet using the tlmgr program TEX Live is a wonderful tool but there are a few considerations to be aware of n it only contains FSF defined free software pack ages a ituses CTAN as its primary source for packages a it does not make interim executable updates a itis not a suitable medium for package test releases Each of these limitations has a perfectly reasonable cause a The TEX Live maintainers agree at least for the purposes of working on TEX Live with the princi ples and philosophy of the free software movement Therefore they follow the FSF guidelines on licens ing a It is good for the TEX community if CTAN is as com plete as possible That gives users one place to look NAJAAR 2010 3 for instance Also it makes it more likely for sepa rate distributions like TEX Live and MiKTeX to be consistent with each other By using CTAN as the primary package source TEX Live promotes the use of CTAN A secondary reason f
50. Maps uitgaven kunnen bestellen uiteraard zolang de voorraad strekt Het gebruik van de site is eenvoudig en de weg wijst zich vanzelf Dus als je een bepaalde Maps niet meer hebt of zo vaak gelezen hebt dat hij vervangen zou moeten worden kijk dan eens op de boekplan site Alle opbrengsten uit de NTG catalogus van boekplan gaan rechtstreeks naar de NTG dus je sponsort er ook nog eens de vereniging mee Met al die nieuwtjes is er niet veel ruimte meer over op deze pagina dus voor deze ene keer ga ik niet proberen een samenvatting te geven van de inhoud van Maps 41 De deadline van Maps 42 is 1 April 2011 en tot die tijd Veel leesplezier toegewenst Taco Hoekwater 2 MAPS 41 Corr Grupa EuroBachoTEX 2011 CALL FOR PAPERS nn Aesthetics and effectiveness of the message cultural contexts The BachoTEX confer ence in 2011 already XIXth of the series will be held from April 29th until May 3rd 2011 It will also be the official European IEX conference hence we will reference it by the already traditional name EuroBacholEX with the distinguishing 2011 BacholEX conferences are being organized yearly since 1993 by GUST the Polish TEX Users Group As the lead theme we propose the aesthetics of publications from the perspective of the effective ness of the message Encouraged are also references to the cultural contexts not everywhere and everything is liked by all We await IEX Metapost ConlpXt LATEX and friends rel
51. NUMMER 41 e NAJAAR 2010 REDACTIE Taco Hoekwater hoofdredacteur Wybo Dekker Frans Goddijn NIG NEDERLANDSTALIGE TEX GEBRUIKERSGROEP NEDERLANDSTALIGE TEX GEBRUIKERSGROEP Voorzitter Taco Hoekwater ntg president ntg nl Secretaris Willi Egger ntg secretary ntg nl Penningmeester Ferdy Hanssen ntg treasurer ntg nl Bestuursleden Frans Absil fgj absil nlda nl Frans Goddijn frans goddijn com Hans Hagen pragmaQwxs nl Postadres Nederlandstalige TEX Gebruikersgroep Maasstraat 2 5836 BB Sambeek ING bankrekening 1306238 t n v NTG Arnhem BIC code INGBNL2A IBAN code NL53INGB0001306238 E mail bestuur ntg ntg nl E mail MAPS redactie maps ntg nl WWW www ntg nl Copyright 2010 NTG De Nederlandstalige TEX Gebruikersgroep NTG is een vereniging die tot doel heeft de kennis en het gebruik van TEX te bevorderen De NTG fungeert als een forum voor nieuwe ontwikkelingen met betrekking tot computergebaseerde document opmaak in het algemeen en de ontwikkeling van TEX and friends in het bijzonder De doelstel lingen probeert de NTG te realiseren door onder meer het uitwisselen van informatie het organiseren van conferenties en symposia met betrekking tot TEX en daarmee verwante programmatuur De NTG biedt haar leden ondermeer Tweemaal per jaar een NTG bijeenkomst Het NTG tijdschrift MAPS De TEX Live distributie op DVD CDROM inclusief de complete CTAN software archieven Versch
52. acter maps XQuery XSL FO Introduction Formats based on the TEX typesetting engine e g Plain TEX 27 or LaTEX 30 or ConTEXt 8 or LuaTEX 9 are known as wonderful tools to get high quality print outputs Of course they have been initially designed to typeset texts directly written by end users But other texts may be generated dynamically in the sense that they result from some computation applied to more data in particular items belonging to databases A very sim ple example is given by a bill computed by means of a spreadsheet program like Microsoft Excel the mas ter file is an xls or xlsx file that is all information about data is centralised into this file but we may wish such a bill to be typeset nicely using a word processor comparable with LaTEX We personally experienced a more significant exam ple at the University of Franche Comt we manage the projects proposed to Computer Science students in several degrees this curriculum being located at Besan con in the East of France That is we collect projects proposals control the assignment of student groups to projects Then at the semester s end we organise the projects oral defences and rate students from informa tion transmitted by jurys During projects information is transmitted to students and projects supervisors ei ther on the Web or by means of printed documents Managing only a list of project specifications and en r
53. actual effects of translation are defined within simple configuration files the infinitely large set of typographic workflows can be accomodated without being known in advance At the same time once a workflow has been designed within the Subtext system it should enjoy the same long term stability found in the TEX system itself This article briefly explains the conditions motivations and initial design of the emerging system Keywords generative typesetting multi output translation layer pre format Conditions for Subtext Subtext arose as a practical conclusion during the writ ing of my masters thesis in New Media at the Uni versiteit van Amsterdam The initial impulse for the thesis itself was to investigate what available media theories existed that could articulate the dynamics of a generative workflow pre occupied with outputting itself in multiple formats In the case of the thesis this meant PDF and HTML Having heard about the translation software Pandoc I chose to utilize this software in my quest to produce a thesis whose materiality spanned not a single document but multiple files programs and glue scripts In other words the thesis would not be a product set in proprietary software like MS Word but a process that could self correct later in the future should a new format come into existence The raw fact of text on the computer screen is that overall the situation is awful Screenic text can be divided
54. ad of hard coding solutions opening up makes more sense One of the first mechanisms that were opened up was Up to Con TRXt MkVI file IO This means that when a file is opened you can decide to intercept lines and process them before passing them to the traditional built in input parser The user can be completely unaware of this In fact as LuaTEX only accepts UTF 8 preprocessing will likely happen already when other input encodings are used The following helper functions are available local result resolvers macros preprocessed str This function returns a string with all named parame ters replaced resolvers macros convertfile oldname newname This function converts a file into a new one local result resolvers macros processmkvi str filename This function converts the string but only if the suffix of the filename is mkvi or when the first line of the string is a comment line containing macros mkvi Otherwise the original string is returned The filename is optional A few details Imagine that you want to do this def test 1 before 1after When we use names this could look like def test inbetween before inbetweenafter and that is not going to work out well We could be more liberal with spaces like def test inbetween before inbetween after but then getting spaces in the output before or after variables would get more complex However there is a way out def test inbetween before inbetwee
55. aps everyone knows this pleasant feeling when a long lasting project is finally done A few years ago just when I was almost happy with my pdf IEX environment I saw LuaTEX for the first time Instead of enjoying a relief I had to take a deep breath and started moving the world to the Moon The state of weightlessness resulted in that now I am not able to walk on the normal ground anymore But I don t even think about going back Although I still haven t settled down for good the adventure is delightful To domesticate a new environment I gave it a name Luna First thoughts My first thought after meeting LuaTEX was wow Scripting with a neat programming language access to TEX lists the ability to hook some deep mechanisms via callbacks font loader library on hand integrated Meta Post library and more All this was tempting and I had no doubts I wanted to go for it At the first approach I was thinking of migrating my workflows step by step replacing some core mechanisms with those provided by LuaTEX But not only the macros needed to change It was considering TEX a programming language that needed to change In LuaTEX I rather treat TEX as a paragraph and page building machine to which I can talk in a real programming language There were a lot of things I had to face before I was able to typeset anything at least UTF 8 regime and a new TEX font representation A lot of work that I never wanted to do myself S
56. ason so we ll leave aesthetics aside and shift all notes the shift might go wrong if there are stretchable vertical glues on the page e g Nparskip that can be amended and it s left as yet another exercise We won t allow more than one note per line though because that definitely doesn t make sense Here s the TEX part of the code newcount notecount suppressoutererror 1 def note 1 advance notecount 1 expandaf ter newbox csname marginnote_ the notecount endcsname expandafter setbox csname marginnote_ the notecount endcsname vtop hsize 4cm rightskip pt plus 1fil noindent it 1 bgroup attribute100 expandafter the csname marginnote_ the notecount endcsname vadjust pre pdfliteral egroup This might be somewhat unfamiliar even to advanced TEXies because what we re doing is preparing the ground for Lua code First we choose not to insert the note directly in the paragraph to be shifted later if necessary Instead we store the note in a box For each note we create a new box that might seem somewhat resource consuming but there are 65 536 available boxes in LuaTEX so a shortage seems only a distant possibility Alternatively we could store only the source code for the note in a macro and typeset it in a box only when we place notes on the page in the output routine but the asynchronicity between the processing of the main text and the note might lead to trouble So we create boxes ins
57. atch program or will yield the visual result Acknowledgements Thank you Hans Lauwerier for your inspiring material and thank you Piet Mondri aan for your great art For a discussion of the differences in color on various devices I refer to the LaTEX Graphics Companion or to Siep Kroonenberg s Color in professional print production MAPS 20 spring 1998 Thank you Jos Winnink for your suggestion to reorder the material Conclusion Mondriaan was undoubtedly precise but some of his random like works can be created by the use of a pseudo random number generator and yield nevertheless a Mondriaan impression The positioning of the lines in his Lozenge with 2 lines and Lozenge with 3 lines is also precise but division of the sides by the golden ratio yields equally well artistic results I have input his Victory Boogie Woogie in MetaPost tedious work and also scanned the picture Don t have any use for it as yet My case rests have fun and all the best Notes 1 Fora survey of biographies of Dutch mathematicians http bwnw cwi incubator nl cgi bin uncgi alf 2 Born as Piet Mondriaan At the end of his live in the USA he used to call himself Mondrian 3 Which obeys statistical tests for randomness 4 A Dutch art movement which began in 1917 Its characteristics are the use of straight lines and primary colors The artists were generally after utmost simplicity and abstraction Main representatives were Th
58. ated presentations revolving around those issues but will be more than happy if programmers and designers of typographic systems typographers and other users of such systems want to share their thoughts and experience n addition we await papers on support that typography systems can offer to the disabled e g in connection with sign languages or generating speech e g from TEX s mathematical notation Perhaps somebody looked into issues with non alphabetic notations such as tabulature http en wikipedia org wiki Tablature Also please note the Call for IEX Pearls below Workshops and tutorials Especially welcome are proposals for TEX related tutorials or in troductions If you have suggestions for tutorials or workshops by others than yourself or about specific topics please let us know Poster sessions All participants will be given the opportunity to present their TEX and typo graphic results in the form of posters We will provide exhibition space Perhaps new ideas or solutions will emerge Call for TEX Pearls We are continuing the tradition of The Pearls of IEX Programming Here is briefly what is wanted short TEX Metafont or Metapost macro s not necessarily useful a the solution not obvious at the first glance easy to explain necessarily 10 minutes at most If you have something that fits the bill please consider submitting a proposal If you know of somebody s work that does the same
59. ating and maintaining packages to the actual package maintainers Before going on to explain how to use TLContrib it is important to note the following a TLContrib is not a full TEX Live repository it is a completement and contains only its own packages This means TLContrib can only be used as a sec ondary repository on top of an existing TEX Live installation o TLContrib is not maintained by the TEX Live team 4 MAPS 41 the responsibility for the actual packages lies with the package maintainers themselves and the server maintenance is handled by yours truly There is no competition between TLContrib and TEX Live but as one of the goals of TLCon trib is to ease the workload of the TEX Live team it would not make much sense for them to be the ac tual maintainers For this reason there is a separate mailing list dedicated to TLContrib Please address your questions related to packages obtained from TLContrib there and not on the regular TEX Live list Using TLContrib as a distribution First things first before attempting to use TLContrib make sure that you have the latest network update of TEX Live 2010 and in particular that you run the latest tlmgr During the development of TLContrib a small number of incompatibilities have been found in the tlmgr as distributed on the DVD that have since been fixed Furthermore the current version of TLContrib only works with TEX Live 2010 and not for any earlier versions
60. bsite Currently this cron job runs hourly on the hour About package sources Please note Currently only the tar gz tar xz and zip archive formats are supported in the File upload 6 MAPS 41 and HTTP URL methods and there are further strict requirements on the archive itself For a non executable package it should contain a complete TDS sub tree In TEX Live normally all macro files go under texmf dist and in that case this directory level can be skipped in the archive it will be added automatically by the TLContrib publication system Be advised that in general uploading a CTAN zipped folder will not work because CTAN packages are almost never in TDS format For an executable package you can also use the TDS layout with the binaries in bin ARCH but if you only have files inside the binaries folder you can skip the directory structure completely in this case the TLContrib publication system will automatically add the needed structure Make sure that your archive contains only files that belong to your package and especially that it does not accidentally overwrite files owned by other packages Also check twice that the archive contains only files that belong in the TDS Delete backup files and remove any special files that may have been added by the operating system MacOSX especially has a very bad habit of adding sub directories for its Finder that really do not belong in the package It is not always sim
61. by context restart An example of an occasion where you need to keep the function available is in re peated content for instance in headers and footers context setupheadertexts function context pagenumber return true end Of course it is not needed when you use the following method context pagenumber pagenumber Because here ConTpxt itself deals with the content driven by the keyword pagenumber Variables Normally it makes most sense to use the English version of ConTEXt The advantage is that you can use English keywords as in context framed frame on some text Typesetting in Lua using Lua TEX If you use the Dutch interface it looks like this context omlijnd kader FS wat tekst n aan A rather neutral way is context framed frame interfaces variables on 35 some text But as said normally you will use the English user interface so you can forget about these matters However in the ConTEXt core code you will often see the variables being used this way because there we need to support all user interfaces Modes Context carries a concept of modes You can use modes to create conditional sections in your style and or content You can control modes in your styles or you can set them at the command line or in job control files When a mode test has to be done at processing time then you need constructs like the following con
62. cessor cannot Jean Michel Hufflen ensure that opening and closing braces are balanced as in TEX likewise when LaTgx texts are generated it is impossible to ensure that environments like begin document end document 1 are balanced Since such errors are not detected stati cally they just appear when generated texts are pro cessed Let us notice that such a check would be more difficult to apply to the texts generated for the ConTEXt format because the opening and closing com mands for ConTEXt s environments are start and stop e g the equivalent formulation for 1 in LaATKX is starttext stoptext in ConTEXt Concerning the delimiters of a com mand s arguments we can ensure that opening and closing braces more precisely the two character enti ties start group and end group before their replace ment by braces are balanced by using only the XSLT function ntg make group to build a TEX group from a sequence of strings Let us remark that XSLT func tions have been introduced in XSLT 2 0 so there is an additional reason to use this version Another solution could be the use of an XML dialect whose architecture would reflect TEX s markup From our point of view that would complicate the process since an additional step a translation from this dialect into actual TEX like syntax would be performed In addition some versions of such dialects have already been proposed e
63. d for i 0 50 5 do metafun draw fullsquare scaled smm i end metafun stop Watch the call to color this will pass definitions at the TEX end to MetaPost Of course you really need to ask yourself Do I want to use MetaPost this way Using Lua loops instead of MetaPost ones makes much more sense in the following case local metafun context metafun function metafun barchart t metafun start local t t data for i 1 t do metafun draw unitsquare xyscaled s s shifted s 0 10 t ila10 ix10 end metafun stop end local one 1 4 6 2 3 local two 8 1 3 5 9 context startcombination context combination metafun delayed barchart data one one context combination metafun delayed barchart data two two context stopcombination We get two barcharts alongside one two local template path p q color c cl MPcolor darkblue c2 MPcolor darkred p fullcircle scaled 50 Typesetting in Lua using Lua TEX 1 length p n S 5 q subpath s nxl of p draw q withcolor c2 withpen pencircle scaled 1 fill fullcircle scaled 5 shifted point length q of q withcolor ci setbounds currentpicture to unitsquare shifted 0 5 0 5 scaled 60 draw boundingbox currentpicture withcolor ci currentpicture currentpicture xsized 1cm 1 local function steps n fo
64. d string pulp title 0 as xsd string story title O as xsd string order by pulp nb O int data story 0 pulp nb xsd integer pulp nb 0 xsd string pulp nb 0 xsd string data story O pulp xsd string data story O title return Nitem maps mk group pulp nb O string if pulp title O then pulp title 0 footnote maps mk group Book s title of pulp pulp nb 0 string story title 0 else story title 0 eol eol end eol else O Figure 6 Getting a source text for Plain TEX by means of XQuery resp NA within the string s Let us come back to implementation dependent features a simple example is given in Fig 6 we declare that the result is not an XML text by a non portable option saxon output2 Of course if XQuery is used to generate XML texts they are well formed but no analogous check can be done about texts generated for a TEX like engine In other words XQuery has the same drawback as XSLT A curiosity DSSSL DSSSL28 21 was initially designed as the stylesheet language for displaying SGML texts DSSSL includes a core expression language that is a side effect free subset of the Scheme programming language 25 XML being a subset of SGML stylesheets written using DSSSL can be applied to XML texts DSSSL is rarely used now but the example we cite illustrates how a functional program ming language can be suitable for our requirem
65. d therefore offers loops and conditions and the lot you might want to use Lua for anything else than the drawing commands Of course this is much less efficient but it could be that you don t care about speed The next example demonstrates the interface for building graphics piecewise context resetMPdrawing context startMPdrawing context fill fullcircle scaled 5cm withcolor 0 0 5 11 context stopMPdrawing context MPdrawing pickup pencircle scaled 5mm context MPdrawing drawoptions withcolor white for i 0 50 5 do context startMPdrawing context draw fullcircle scaled smm i context stopMPdrawing end for i 0 50 5 do context MPdrawing draw fullsquare scaled i end n n mm context MPdrawingdonetrue context getMPdrawing This gives Ithe first loop we can use the format options associated with the simple context call This will not work in the second case Even worse passing more than one argument will definitely give a faulty graphic definition This is why we have a special interface for MetaFun The code above can also be written as local metafun context metafun 66 MAPS 41 Hans Hagen metafun start n metafun fill fullcircle scaled 5cm withcolor s metafun color darkblue metafun pickup pencircle scaled 5mm metafun drawoptions withcolor white for i 0 50 5 do metafun draw fullcircle scaled smm i en
66. dard LuaTpx library I extend its function ality so that every access to special fields causes an as sociated function call Every such function updates the internal representation of a graphic state and keeps the output pdf graphic state synchronized by writing out the appropriate content stream data But whatever goes on behind the scenes on top I have just key value pairs I m glad I no longer need to think about obscure TEX interfaces for that The Lua language is the interface I expect graphic features to behave more or less like the basic text properties such as font and size They should obey grouping and they should remain active across page breaks The first requirement can be satis fied simply by using aftergroup in conjunction with currentgrouplevel A simple grouping wise graphic state could be made as follows newcount gstatelevel def pdfsave latelua pdf print page q string n def pdfrestore latelua pdf print page Q string n def pdflocal 1 ifnum currentgrouplevel gstatelevel else gstatelevel currentgrouplevel pdfsave aftergroup pdfrestore fi latelua pdf print 1 string n begingroup pdflocal 5 g this is gray endgroup this is black Passing the graphic state through page breaks is rel Luna my side of the moon atively difficult due to the fact that we usually don t know where IEX thinks the best place to break is In my earth life I was abusing ma
67. de hpack n now accepts cal expand ratio and subst_ex_font modifiers This feature helps the implementation of font expansion in a pure Lua paragraph breaking code o node hpack n and node vpack n now also return the badness of the created box and accept an optional direction argument The pdf table a The new functions pdf mapfile and pdf mapline are aliases for the corresponding pdf TEX primitives a pdf registerannot reserves a pdf object number and returns it a The functions pdf obj pdf immediateobj and pdf reserveobj are similar to the corresponding pdf IEX primitives Full syntax details can be read in the LuaTEX reference manual o New read write string keys pdf catalog string goes into the Catalog dictionary pdf info string goes into the Info dictionary pdf names string goes into the Names dictionary referenced by the Catalog object pdf trailer string goes into the Trailer dictionary pdf pageattributes string goes into the Page dictionary pdf pageresources string goes into the Resources dictionary referenced by the Page object pdf pagesattributes string goes into the Pages dictionary The tex table Finally there are some extensions to the tex table that are worth mentioning a tex badness f s interfaces to the badness internal function Accidentally this disables access to the badness internal parameter This will be corrected in a
68. demonstratie van een TEX applicatie op de iPad Een van de processen is uit de hand gelopen en het systeem heeft te kampen met een reusachtig lek aan geheugenruimte Hoe dan ook is het indrukwekkend om te zien dat het in principe mogelijk is een TEX document te typen en te compileren op de iPad Logischer zou het zijn vertelt Arthur als je zo n tablet online kon gebruiken als invoer voor een TEX server elders op internet waarna je de pdf zou kunnen downloaden of laten afdrukken 92 MAPS 41 fe vee are De verplichte groepsfoto Hans Hagen vertelt ook tijdens de lunch over het ty pesetten van tekst die anders dan wij gewend zijn van rechts naar links loopt of van boven naar beneden op het papier De techniek gaat me ver boven de pet maar ik vind het altijd interessant om Hans zijn manier van redeneren te volgen zijn nuchtere aanpak te zien Taco Hoekwater Hans van der Meer en Hans Hagen Willi die veel weet van typografie maar ook van ma chines beschrijft enthousiast wat hij zag op een druk kerij van bijbels waar twee katernen tegelijk werden geproduceerd Het dunne papier wordt door de grote machines ongelooflijk snel gedrukt gevouwen en ge naaid wat vooral mogelijk is doordat het papier zich zo soepel laat verwerken lebendig is zoals men in Zwit serland zegt Willi Egger Willi Egger besluit de dag met een demonstratie van een manier die hij ontwikkelde om een A4 tje zo te printen en te vouwe
69. dence this is also the place where you create new packages and package releases After registration is complete you can log in to TLContrib by following the member section link If you do upload a package to TLContrib please also tlcontrib metatex org subscribe to the TLContrib mailing list because any questions about your package a likely to be made there Package creation example This quick start guide uses an update of the context lettrine package as an example of how to create a package In the following you need to replace context lettrine by the actual package name that you are updating of course Besides being logged in to TLContrib the first thing you need to do is to create your updated package source In this case the easiest way is to start from the current TEX Live version so first you have to fetch the current context lettrine archive s from the network distribution of TEX Live The base URL is http www ctan org tex archive systems texlive tlnet archive In fact for this example there are two archives to be downloaded context lettrine tar xz context lettrine doc tar xz For some TEX Live packages there is even a third archive file named lt package gt source tar xz This is because the distribution system of both TEX Live and TLContrib splits the contribution into run time files documentation files and source files Users can ask the installer not to install the last two file types to save on
70. disk space and network traffic You have to create a single local archive file with the combined and updated content of the two downloaded archives After extracting both tar xz files in the same directory you will have a tree structure that looks like this doc context third lettrine lettrine doc pdf lettrine doc tex W pdf tex context interface third lettrine xml third lettrine t lettrine tex tlpkg tlpobj context lettrine doc tlpobj context lettrine tlpobj NAJAAR 2010 5 First delete the whole tlpkg sub tree The tlpobj files contain meta data specific to each particular revision of a package and the information in the downloaded version of these files will henceforth be no longer applicable New versions of the tlpobj files will be generated automatically by TLContrib s distribution creation tool You may now update the other files in the tree and create the archive file the acceptable formats are tar gz tar xz and zip Please read the next section named About package sources carefully before final izing the archive The TLContrib context lettrine package will use the newly created archive as source for the package so make doubly sure you use the right files The use of existing TEX Live package archive s to start with is just so you get an idea of what goes where sometimes TEX Live packages contain more files and symbolic links than you initially expect You can build the source packa
71. duction to XQuery In Tomasz PRZECHLEWSKI Karl BERRY and Jerzy B LUDWICHOWSKI eds IEX at a Turning Point or at the Crossroads Proc BachoTEX 2009 Conference pp 17 25 April 2009 Jean Michel HUFFLEN Multidirectional Type setting in XSL FO In Tomasz PRZECHLEWSKI Karl BERRY and Jerzy B LUDWICHOWSKI eds TEX at a Turning Point or at the Crossroads Proc BachoTEX 2009 Conference pp 37 40 April 2009 Jean Michel HuFFLEN Processing Computed Texts ArsTEXnica Vol 8 pp 102 109 In GUIT 2009 meeting October 2009 Roberto IERUSALIMSCHY Programming in Lua 2nd edition Lua org March 2006 International Standard ISO IEC 10179 1996 E DSSSL 1996 ISO IEC 19757 The Schematron An XML Structure Validation Language Using Pat terns in Trees http www ascc net xm1 resource schematron schematron html June 2003 Michael H Kay XSLT 2 0 Programmer s Ref erence 3rd edition Wiley Publishing Inc 2004 Michael H Kay Saxon The XSLT and XQuery Processor October 2010 http saxon sourceforge net Richard Kersey William D CLINGER and Jonathan A REEs with Harold ABELSON Norman I ApAMs Iv David H BARTLEY Gary Brooks R Kent Dysvic Daniel P FRIEDMAN Robert HALSTEAD Chris Hanson Christopher T Haynes Eugene Edmund KOHLBECKER JR Donald Oxrey Kent M PITMAN Guillermo J Rozas Guy Lewis STEELE JR Gerald Jay SUSSMAN and Mitchell WAND Revised Report on the Algorith
72. e program and on some platforms that makes it near impossible to use GUI based extensions Font related Lots of small changes have taken place in the font processing a The backend message cannot open Type 1 font file for reading now reports the name of the Typel font file it was looking for a Itisnolonger possible for fonts from included pdf files to be replaced by merged with the document fonts of the enveloping pdf a Support for Type3 pgc files has been removed This is just for the pgc format invented by Han Th Th nh bitmapped pk files still work a For TrueType font collections ttc files now the used sub font name and its index id are printed to the terminal and if the backend cannot find the font in the collection the run is aborted a Itis now possible to use Apple dfont font collection files Unfortunately in Snow Leopard a k a MacOSX 10 6 Apple switched to a ttc format that is not quite compatible with the Microsoft version of ttc As a result the system fonts from Snow Leopard cannot be used in LuaTEX 0 60 yet a The loading speed of large fonts via the fontloader library and the inclusion speed for sub setting in the backend have both been improved a Two new MathConstants entries have been added Suppose the Lua math font loading code produces a Lua table named f then in that table you can set f MathConstants FractionDelimiterSize Lua TEX 0 60 NAJAAR 2010 21 f Mathconstants FractionDelimiterDis
73. e the list is incomplete In this context Free means according to the Debian Free Software Guidelines Log message This field is just for release notes it will not be ex ported to the TLContrib repository The SVN URL and GIT URL methods will automatically refill in this field with the remote revision and log message For other source methods you can fill in whatever seems appropriate Release state Only packages that are public are exported but this also has side effects Once the Release state is pub lic it is no longer possible to edit a package release on the spot Submitting the form in that case will always create a new release On edits you will see some extra information Synch state and rev The first is the current status of a package release with respect to the published repository the second is the revision number that has been assigned to this release Version This is the user visible version field Source Here things get interesting There are five ways to put the source of a package release into the data base as explained in the next sections As previous revision Ifyou are editing an already existing package then it is possible to re use the uploaded source from the revision you are editing as the source for the new revision that will be created File upload Upload of a local archive file via CGI Be warned that if there are other errors in your form you will have to re select the local file after fix
74. e titel erbij gevoegd Biblatex mla is echter nog niet aangepast aan de nieuwste versie van biblatex Het is ook geen onderdeel van TEXLive maar wel van MiKTEX Het is te vinden op http konx net biblatex mla en op CTAN in macros latex contrib biblatex contrib biblatex mla zip biblatex jura Een stijl van Ben E Hard voor de Duitse juridische stijl van citeren volgens voorschriften van de uitgever Nomos Ook dit pakket is geen onderdeel van TEXLive maar wel van MiKTEX De documentatie bestaat slechts uit een README file Hieruit is wel duidelijk dat dit geen vervanging is van het uitgebreide jurabib pakket voor het normale BibTEX gebruik Het pakket wordt gebruikt door middel van het commando Nieuws van CTAN usepackage style biblatex jura biblatex Opmerkelijk dat de stijl hier biblatex jura heet terwijl de andere stijlen het gedeelte biblatex weglaten Ci taties worden met footcite gedaan inplaats van met cite Bibfile wijzigingen Sommige opties van biblatex of een van de stijlen wer ken pas optimaal als de bibfile aangepast wordt Programma Biber Biber is een alternatief voor BibTEX voor gebruik bij biblatex Het is geschreven in Perl en kan op machines waarop Perl aanwezig is redelijk gemakkelijk ge nstal leerd worden Op de site http biblatex biber sourceforge net zijn bovendien executables te downloaden voor Linux Mac OS X en Windows Het is niet opgenomen in TEXLive en MiKTEX Bij gebr
75. een improved a Of course there were lots of code cleanups and improvements to the reference manual Embedded libraries and other third party inclusions The following are changes to third party code that for the most part should not need much explanation 20 MAPS 41 Taco Hoekwater amp Hartmut Henkel MetaPost is now at version 1 211 Libpng is now at version 1 2 40 New synctex code is imported from TEXLive The Lua source file from the luamd5 library which provides the md5 hexsuma func tion is now embedded in the executable In older versions of LuaTEX this file was missing completely a The Lua co routine patch coco is now disabled on linux powerpc because it caused crashes on that platform due to a bad upstream implementation Do 0 0 Dynamic loading of lua modules LuaTEX now has support for dynamic loading of external compiled Lua libraries As with other require files LuaTEX can and will use kpathsea if the format allows it to do so For this purpose kpathsea has been extended with a new file type clua The associated texmf cnf variable is defined like this by default CLUAINPUTS SELFAUTOLOC 1ib progname engine lua which means that if your LuaTEX binary lives in opt tex texmf linux 64 bin then your compiled Lua modules should go into the local directory or in a tree below opt tex texmf linux 64 bin lib lua Be warned that not all available Lua modules will work LuaTEX is a command lin
76. eginfig 0 s 200 z1 0 5s z2 5s s z3 s 5s z4 5s z5 0 618 1 618 z2 z3 z6 0 618 1 618 z3 z4 z7 1 1 618 z3 z4 z8 1 1 618 z4 z1 z9 0 382 1 618 z1 z41 z10 0 382 1 618 z1 z2 z11 z5 z7 intersectionpoint z6 z8 path p p z1 z2 z3 z4 cycle pw 4 pickup pencircle scaled pw fill p withcolor 95white fill z1 z10 z9 cycle withcolor blue fill z7 z11 z6 cycle withcolor red green fill z8 z11 z7 z4 cycle withcolor 85white draw z5 z7 draw z6 z8 draw z9 z10 clip currentpicture to p draw p withcolor 97white endfig end la Mondrian NAJAAR 2010 For the right Lozenge the main part of the above reads fill p withcolor 95white draw z5 z7 draw z6 z8 clip currentpicture to p draw p withcolor 97white Remark In contrast with PostScript we don t have to translate the origin in MetaPost to somewhere in the middle For my last year s birthday Sveta and I composed the following a la Mondriaan invi tation starting from the left D Lozenge Verjaarsdrive Za 19 dec 13 30 Not so long ago I used one of his Apple trees along with a little poetic proza for our local gardeners bulletin It is about one of our Apple trees which in every season has something to offer spring blossoming beauty summer healthy shade autumn fruits to enjoy winter beautiful silhouet la Mondriaan O0 0 0 83 84 MAPS 41 Kees van der Laan Appelweelde Bruingetinte
77. egister it in the post linebreak filter callback directlua callback register post linebreak filter textcolor Note that we could improve this code for the first and last lines of a paragraph taking the indent and parfillskip into account to create more faithful im ages of those lines I leave it as an exercise to the reader as is customary Underlining The previous code was hopefully fun but not terribly useful well who knows let s do something hope fully more useful and no less fun Everybody knows that underlining is in bad typo graphic taste That said it may have its uses and any way allows us to investigate LuaTEX further Underlin ing has been done in IEX see Donald Arseneau s ulem for instance it requires great wizardry and has some limitations With LuaTEX it s almost child s play The problem with underlining in TEX is that you have to add the underline before the paragraph is built and this hinders hyphenation In LuaTEX we can do it after hyphenation is done we retrieve the nodes to underline in the typeset lines But how do we spot them The answer lies with another basic LuaTEX func tionality namely attributes These are very simple yet very powerful An attribute is like a count register in that it holds a number The difference with a count register is that nodes retain the values of all attributes in force when they were created Thus we can set an attribute to some value inpu
78. elevel gt first space fi recurselevel text Npar In order for this to work you need to give your file the suffix mkvi or you need to put a directive on the first line macros mkvi You can of course use delimited arguments as well given that the delimiters are not letters def TestOne 1 1 this is 1 def TestTwo some Hans Hagen this is some def TestThree whatever more this is more and whatever def TestFour one two def TestFive alpha one one two alpha You can also use the following variant which is already present for a while but not that much advertised This method ignores all spaces in definitions so if you need one you have to use space starttexdefinition TestSix oeps here oeps stoptexdefinition These commands work as expected startlines TestOne one TestTwo one NTestThree one two TestFour one two TestFive one two TestSix one stoplines this is one this is one this is two and one two two one here one You can use buffers to collect definitions In that case you can force preprocessing of the buffer with mkvibuffer name Implementation This functionality is not hard coded in the LuaTEX engine as this is not needed at all We just preprocess the file before it gets loaded and this is something that is relatively easy to implement Already early in the development of LuaTEX we have decided that inste
79. elliptical arcs it uses the fact that unlike in pdf transformations can be applied between path construction operators r 15 def dx 50 def dy 50 def pos day 7 mod dx mul week dy mul def arx arc load def dx dy 4 mul neg translate 0 6 setgray 0 4 setlinewidth 1 setlinejoin 1 setlinecap 0127 day exch def week day 7 idiv def s day 360 mul 28 div cos def day 14 eq arx arcn load def gsave pos r 90 270 arx day 7 eq day 21 eq or closepath gsave Q setgray stroke grestore s 1 scale pos exch s div exch r 270 90 arx gsave Q setgray initmatrix stroke grestore ifelse fill grestore ifelse for a aa a a aa L L 1 q hd hd ke d hod Ww sy w g amp T l a XN XQ XxX NX yyy YY J B J Z Z l A D N Ma f TSN da a Ab Eee A W W O VW In LuaTEX one can hire MetaPost for drawings obtain ing a lot of coding convenience The above program wouldn t be much simpler though As for now Meta Post does not generate pdf the data it outputs still needs some postprocessing to include the graphic on the fly into the main pdf document AsIdo not want to invent a completely new interface for graphics I decided to involve PostScript code into Pawet Jackowski the document creation Just to explain how it may pay off after translating the example above into a pdf content stream I obtain 30k bytes of code which is quite a lot in comparison with 500 bytes of PostScript inpu
80. ents Fig 7 gives a stylesheet that produces a result equiv alent to Fig 3 In fact end users do not write TFX commands when they develop a stylesheet the jade program can generate TEX like texts jade d pulps dsl t tex ds sgml we have to specify a predefined backend here tex the typesetting engine usable to process jade s results being Jade TEX 7 7 5 2 Deriving texts directly pro cessable by LaTEX or ConTEXt is impossible As shown in Fig 7 processing a name element uses pattern matching element name E the E expression consists of assembling literals by means of the make form using types predefined in DSSSL paragraph sequence The generic type of such results is called sosofo32 w r t DSSSL s terminology Enriched TEX engines Ifwe go back to programs based on TEX like typesetting engines there are two other possible methods based on TEX engines enriched by using a more classical programming language In both cases XML texts are pre processed by procedures belonging to a programming language and the result is sent to a TEX engine Of course such a modus operandi is suitable only if we want to generate EY IEX texts it would be of little interest to get XML texts or pages written using X HTML 3 PyTEX 6 is written using Python 28 and uses TEX as a daemon Getting the components of a computed 74 MAPS 41 Jean Michel Hufflen lt DOCTYPE style sheet PUBLIC
81. eo van Doesburg Piet Mondriaan Bart van der Leck Gerrit Rietveld and J J P Oud active in various art forms among others architecture 5 Adding the year exceeds MetaPost number capacity for the moment 6 This extra work is superfluous in the PostScript variant Kees van der Laan March 2010 Hunzeweg 57 9893PB Garnwerd NL kisal xs4all nl NAJAAR 2010 91 NTG Najaarsbijeenkomst 2010 Tijdens een van haar presentaties op de ConTpxt meeting in Brejlov dit jaar vertelde de Finse Mari Voipio dat ze altijd wat waardevols oppikt tijdens TEX conferenties Veel van wat er wordt verteld gaat langs me heen of het vliegt hoog boven mijn hoofd voorbij maar er is ook altijd iets wat mijn ogen opent een ontdekking waarmee ik rijker naar huis terugkeer Ik verheug me ook altijd op een ntg dag TEX gebrui kers onder elkaar die ge nteresseerd zijn in zoveel dat direct of zijdelings te maken heeft met het typesetten van tekst en die daarover wat te vertellen hebben De lokaties waar we bijeenkomen zijn vaak de moei te waard Plekken waar je anders niet komt Een mooie zaal van een restaurant in een klein stadje een verga derkamer van een kerk een statige kamer in een voor malige watertoren En dankzij uitstekende contacten bij Defensie zijn we met zekere regelmaat onder dak bij het leger Dit keer op het terrein van het Kasteel van Breda waar sinds 1826 de Koninklijke Militaire Academie is gevestigd Mooie gebouwen en zelfs een
82. er de nieuwe frisse uitstraling van de NTG website maar ga vooral even kijken op http www ntg nl om het resultaat met eigen ogen te zien En dan deze Maps zelf Er is weer een kleine lay out aanpassing de titels en eventuele subtitels van de artikelen zijn niet meer schreefloos maar in hetzelfde font als de eigenlijke tekst Linux Libertine Met deze verandering ziet de aanvang van een artikel er nu NAJAAR 2010 wat rustiger uit En wie weet in de volgende Maps veranderen wellicht de kopjes en subkopjes ook nog wel Die volgende Maps wordt overigens waarschijnlijk niet meer gedrukt in offset maar geprint via een goe de Nederlandse printing on demand service die Hans Hagen heeft ontdekt We zouden dat liever niet doen maar door het langzaam maar gestaag zakken van het ledenaantal van de NTG zakt uiteraard ook de oplage van de Maps en het gebruik van een echte drukker begint een onredelijke zware druk op de begroting te worden En er is ook een lichtpuntje aan de omschakeling naar printen voortaan is het dan niet meer belangrijk of de artikelen in kleur helemaal vooraan of helemaal achteraan staan Bij printwerk wordt er namelijk per pagina afgerekend voor kleur of zwart wit in plaats van per katern zoals bij drukwerk Een laatste nieuwtje Hans Hagen en ik hebben op http www boekplan nl een site waar diverse boeken via printing on demand worden aangeboden Op die zelfde site is een pagina aangemaakt waar jullie oudere
83. eral squares have been painted over Square Oval and Lozenge cadres I generated an abstract picture of lines with a spread in size thickness and with a color shade such that the impression is blue like green like I intended these pictures as presents to my friends Made them unique by using the date of birth month and day as seed for the pseudo random number generator in MetaPost Colored the frame with their favorite color which also biases the color shade Below is Sveta s one in pink with 1007 as seed for the pseudo random number generator cgl okt09 How to First we have to decide on the size of the rectangle Next the number of randoms I chose 500 but that can be adjusted at will The lines are drawn within a rectangle of 180 by 180 1 618 obeying the golden ratio For the position in the rectangle the NAJAAR 2010 85 86 MAPS 41 Kees van der Laan random number generator must generate numbers between 0 0 180 291 conform PostScript s BoundingBox convention to denote a rectangle uniformdeviate delivers a number between 0 and its argument We have the in tervals 0 u and 0 v so the invokes for the x y position read hx uniformdeviate u hy uniformdeviate v I alternate between vertical and horizontal lines where the lines have maximum length size 10 and maximum pen width pw 5pt The actual size horizontally as well as vertically is determined by an invoke of uniformdeviate draw hx
84. erface similar to the kpsewhich program an example call looks like this kpse set program name luatex print kpse lookup plain tex format tex all true must exist true The node table In the verbatim code below n stands for a userdata node object a node vpack n packs a list into a vlist node like vbox a node protrusion skippable n returns true if this node can be skipped for the purpose of protrusion discovery This is useful if you want to re calculate protrusion in pure Lua node dimensions n returns the natural width height and depth of a horizontal node list a node tail n returns the tail node of a node list a Each glyph node now has three new virtual read only fields width height and depth The values are the number of scaled points glue_spec nodes now have an extra boolean read only field writable Some glue specifications can be altered directly but certain key glue specifications are shared among many nodes Altering the values of those is prohibited because Lua TEX 0 60 NAJAAR 2010 23 it would have unpredictable side effects For those cases a copy must be made and assigned to the parent node a hlist nodes now have a subtype to distinguish between hlists generated by the paragraph breaking explicit hbox commands and other sources a node copy_list n now allows a second argument This argument can be used to copy only part of a node list a no
85. es The sympatico between the two projects is thus too significant to deny The configuration files themselves present a slight complication as they need to be highly parse able despite potentially containing every reserved charac ter known to any programming language or syntax currently known Thankfully there have been many attempts to achieve this robustness One that fits par ticularly well into the generative typesetting mind set which Subtext exemplifies is YAML Yet Another Markup Language YAML is intended to facilitate everything from configuration files to object persis tence through a human friendly syntax The flexibility of such a system will no doubt provide a solid founda tion for implementing Subtext Additionally there will be a standard syntax for Subtext That is there will be a defined pre format that ships with the system This standard syntax will include bibliographic functionality that is currently limited or non existent in most multi output workflows Longer term goals include a web interface for deal ing with the input files Such a system would likely integrate the newly open sourced Etherpad software for online editing This would be tied to a version control interface based on git that would fill in the functionality that MS Word s Track Changes system currently provides Ideally integrated into this system would be a real time parser such as exhibited in the AJAX ified interface of the WMD ed
86. es ns h end m h n top s m return m end end end local function get s local m top and top s or s return m end local function push top n 0 local s stack stack if s then setmetatable top __index s end insert stack top end local function pop top remove stack end local leftbrace local rightbrace will be in patterns local P V S R C Cs Cmt lpeg P lpeg V lpeg S lpeg R lpeg C lpeg Cs lpeg Cmt Hans Hagen Up to Con TRXt MkVI local escape local space local spaces local newline local nobrace local longleft local longright local nolong local name local longname local variable local escapednam local definer local startcode local stopcode local anything local always local pushlocal local poplocal local declaratio local identifier e n PONN patterns space space 1 patterns newline 1 leftbrace rightbrace leftbrace P rightbrace P 1 longleft longright RC AZ az 1 utf longleft nolong 1 longright P Cs name longname escape name escape x P def P egdx P def P starttexdefinition P stoptexdefinition patterns anything patterns alwaysmatched always push always pop variable set variable get local function matcherror str pos report_macros runaway definition at
87. f statements From the standpoint of a generative typesetting workflow that does not require program ming expertise these solutions for edge cases are far from optimal One Mutable Interface to Produce Them All Today the largest demands of digital publishing re volve around flexibility The vast array of existing and on coming e readers is but one example of this More general concerns include the necessity of both machine readable formats and typographically sound documents Currently this means HTML XML and PDF Toward Subtext Yet once e readers are brought into the mix the ePub format becomes imperative Yet while ePub is the most accepted format for e reader publishing today there is always the chance one might even say inevitability that a new format will become standard in the future Future proofing is a significant advantage of a generative typesetting work flow but the programming required nature of edge cases and indeed any modification to the translation layer decreases the adoptability of generative typeset ting for non technical fields such as the humanities The solution that Subtext proposes is to disengage both the interface to the translation layer as well as the effects of that layer In this way Subtext can be seen as a very thin layer one that takes interface primitives from a configuration file and translates them into an AST The effects of this AST are then interpreted according to rules defined in a
88. f you plan to use TLContrib regularly it makes sense to define a shell alias to save you some typing the next trick is courtesy of Will Robertson Define an alias to make things easier to remember put this into your bash_profile or equivalent this has to be on a single line alias tlc tlmgr repository http tlcontrib metatex org 2010 You can now view what is available in the TLContrib repository with standard tlmgr commands such as tle list to see what is currently available for installation Pack ages can be updated to their pre release versions by typing say tlc update siunitx and if an update performed in this way goes bad and you d like to revert to the official release execute tlmgr install fontspec reinstall and things will be back to normal Using TLContrib for distribution The rest of this article describes further details impor tant for a package maintainer aiming to use TLContrib for distribution Before you decide to add a package to TLContrib please bear this in mind a It is not the intention of TLContrib to replace either TEX Live or CTAN if a package is not blocked from TEX Live for one of the reasons mentioned earlier and can be made available on TEX Live or CTAN then it should not be part of TLContrib at all In order to be able to upload packages to TLContrib you have to be a registered user You can register as a user via the TLContrib website and not by coinci
89. fTEX immediate pdfobj lt lt FunctionType 2 Range 01010101 Domain 1 N 1 co 0 0 0 C1 0 4 1 gt gt pdfobj Separation Spot DeviceCMYK the pdflastobj space R pdfrefobj pdflastobj In LuaTEX one can use Lua structures to represent pdf structures Although it involves some heuristics I find it convenient to build pdf objects from clean Lua types like in this example pdfstate create Separation Spot DeviceCMYK dict ref NAJAAR 2010 27 FunctionType 2 Range 0 1 0 1 0 1 0 1 Domain 0 1 N 1 CO 0 0 0 0 C1 0 4 1 0 Usually I don t need to create an independent represen tation of a pdf object in Lua I rather operate on more abstract constructs which may have a pdf independent implementation and may work completely outside of LuaTgx For color representation and transformations I use my color library which has no knowledge about pdf at all An additional LuaTpX dependent binder ex tends that library with extra skills necessary for the pdf graphic subsystem Here is an example of a somewhat complex colorspa ce a palette of duotone colors each consisting of two spot components with lab equivalent the pdf structure representation for this is much too long to be shown here pdfstate local lab colorspace lab reference D65 local duotone colorspace poly name Black lab black name Gold lab yellow
90. face and effects can be custom crafted according to the requirements of the task Preliminary Thoughts on Implementation There has yet to be a line of code committed to Sub text At present it is a simple design impulse with a NAJAAR 2010 47 variety of expectations and desires tied into a proposed means of accomplishing a more fluid and responsive generative typesetting workflow This does not mean however that there has yet to be any thought put into the platforms that will underpin Subtext The first choice is the programming language Con sidering the importance of parsing grammar and metaprogramming functionality to the implementa tion of a mutable translation layer my first impulse is to write Subtext in Perl 6 This might come as a slight shock but that shock should not last beyond an exploration into the power of Perl 6 grammars A robust rules based grammar engine was one of the top details for which Perl 6 was designed Combined with features such as multi method dispatch and other metaprogramming conveniences Perl 6 is primed to host Subtext Barriers to entry include a lack of docu mentation but at the same time the scene around the programming language is small and extremely helpful Another downside is the current speed of the language though that is an aspect which is addressed with each monthly release In general the idea of Perl 6 is that it presents a mutable interface to its own programming capaciti
91. final spec stretch order 2 final spec stretch 1 node insert after n t final local m tex linebreak n hangafter 2 hangindent tex sp 2em local q node vpack m node write q stopluacode The result is Thus I came to the conclusion that the designer of a new system must not only be the implementer and first large scale user the designer should also write the first user manual The separation of any of these four components would have hurt IEX significantly If I had not participated fully in all these ac tivities literally hundreds of improvements would never have been made because I would never have thought of them or perceived why they were im portant But a system cannot be successful if it is too strongly influenced by a single person Once the initial design is complete and fairly robust the real test begins as people with many different viewpoints undertake their own experiments Summary All in all there are not that many incompatible changes compared to LuaTEX 0 40 and the LuaTEX project is progressing nicely LuaTEX beta 0 70 will be released in the autumn of 2010 Our current plans for that release are access to the actual pdf structures of included pdf images a partial redesign of the mixed direction model even more access to the LuaTEX internals from Lua and probably some mote Taco Hoekwater amp Hartmut Henkel Pawet Jackowski NAJAAR 2010 25 Luna my side of the moon Perh
92. fined typographic objects like figures and tables to the ap propriate tags We can use this mechanism to embed an XML doc ument into a tagged PDF document which opens quite interesting perspectives but we can also start from a structured TEX document and end into an XML one NAJAAR 2010 35 and this is more interesting because it s a matter of backend only and because it s already implemented setupbackend export yes NAsetupstructure state start method none starttext startelement document startelement chapter title Test opes startelement p input ward stopelement par stopelement stopelement stoptext produces a lt tex file gt export like this original XML spaces are not preserved in this listing lt xml version 1 Q standalone yes gt lt input filename test 2 gt lt processing date 10 09 10 15 28 48 gt lt context version 2010 09 24 11 40 gt lt exporter version 0 10 gt document language en file test 2 date 10 09 10 15 29 04 context 2010 09 24 11 40 version 0 10 gt lt chapter title Test gt opes lt p gt The Earth as a habitat for animal life is in old age and has a fatal illness Several in fact It would be happening whether humans had ever evolved or not But our presence is like the effect of an old age patient who smokes many packs of cigarettes per day nen and we humans are the cigarettes lt p gt lt cha
93. footnote reference the second child is the actual foot note s contents 37 6 12 3 This fo footnote ele ment seems to be low level in comparison with LaTEX s footnote command Of course if you want foot notes to be numbered automatically XSLT addresses this problem However another point seems to us to be more debatable end users are responsible for putting a leader separating footnotes from the text body we show how to proceed in Fig 5 So some footnotes may be preceded by a leader some may not This point may seem anecdotal but for LaTEX users some features of XSL FO can be viewed as low level and be difficult to handle since they are already programmed in LaTeX classes Last but not least most current XSL FO processors do not implement the whole of this language even if they can successfully process most of XSL FO texts used in practice 3 So some features may be unusable whereas an equivalent construct will work in IA TpX XSL FO has been designed to deal with the whole of Unicode so it shows how the Unicode bidirectional algorithm 35 is put into action 18 but this point may also be observed with XqIpx XQuery producing TEX sources XQuery 40 is a query language for data stored in XML form as SQL 4 does for relational data bases XQuery can be used to search documents and arrange the result as an XML structure or a simple text possibly suitable for a TEX like engine An XQuery program processing
94. future LuaTEX version tex sp 1in converts Lua style string units to scaled points tex tprint is like a sequence of tex sprint calls tex shipout n ships out a constructed box tex nest and tex nest ptr together allow read write access to the semantic nest mode nesting For example this prints the equivalent of prevdepth at the current mode nesting level a ee print tex nest tex nest ptr prevdepth tex nest ptr is the current level and lower numbers are enclosing modes Each of the items in the tex nest array represents a mode nesting level and has a set of virtual keys that be accessed both for reading and writing but you cannot 24 MAPS 41 Taco Hoekwater amp Hartmut Henkel change the actual tex nest array itself The possible keys are listed in the LuaTEX reference manual a tex linebreak n allows running the paragraph breaker from pure Lua The second argument specifies a potentially large table of line breaking parame ters the parameters that are not passed on explicitly are taken from the current typesetter state The exact keys in the table are documented in the reference manual but here is a simple but complete example how to run line breaking on the content of box setbox hbox to hsize input knuth startluacode local n node copy list tex box 0 list local t node tail n local final node new node id glue final spec node new node id glue spec
95. ge completely from scratch if you want to but it is easy to forget files if you don t check Incidentally while the base name of the local archive file does not matter you have to make sure that the extension is tar gz tar xz or zip otherwise the upload will fail Now go to http tlcontrib metatex org log in and click new package As the new package is an up date to TEX Live make sure you select that option and the proper package name from the drop down context lettrine In the next screen most of the needed input will be automatically filled in for you based on the current TEX Live revision of the package Edit the rest of the input form to have a proper version and set the source to File upload Its value has to be set to the new archive that was created earlier Adjust the Release state drop down so it is set to public It is also wise to check the license field for it does not always import correctly due to database mismatches Then press submit new revision verify the upload and submit again to finalize the new package Assuming all went well all that is needed for now is to wait until the hour has passed your package should be available from the TLContrib repository after that The TLContrib distribution system works asynchro nously the front end data that you as a package main tainer can create and modify is exported to the user side TLContrib repository by a cron job that runs indepen dent of the actual we
96. ginal XML file Let us come to our example the text of a stylesheet that may be used to get Fig 3 from Fig 1 is given in extenso in Fig 4 This stylesheet takes as much advantage as possible of the features introduced by XPath s and XSLT s new version 2 2 0 for example we have made precise the types of the used variables by means of as attributes 70 MAPS 41 item 1 The Man of Bronze item 2 The Land of Terror item 7 The Lost Oasis item 56 Repel footnote Book s title of pulp 56 The Deadly Dwarf item 74 World s Fair Goblin end Figure 3 Stories titles sorted by pulp numbers these types being provided by XML Schema s library 3 Likewise we have made precise the types of templates results As it can be noticed in Fig 4 these types belong to XML Schema s namespace whereas XSLT constructs are prefixed by the namespace associated with xsl Since we are interested in deriving texts processable by TFX an important new feature introduced by XSLT 2 0 is the possible use of character maps 41 20 1 In particular they allow TEX s special characters to be replaced by commands producing them backslash 14 whenever they appear within a text node to be put by XSLT More precisely a single character can be re placed by a string as shown by the character map some special characters given in Fig 4 To dis tinguish an actual backslash character belonging to a
97. guages should be permitted if they don t modify the document The ISO standard is not freely available and the PDF A 1a validators are complex to implement and usu ally expensive commercial products this is an obstacle for the diffusion of PDF A Notes on References For the first section some informations on PDF A 1 are at Wikipedia 1 the techdoc at 2 and 4 Very useful are also the references of C Beccari s paper at 9 An interesting use of JavaScript in PDF is 3 For the second section the ConTEXt wiki 6 has some terse informations because the code is the ulti mate reference Tagged PDF is described in the version of hybrid pdf 7 that is part of Proceedings of the 4 ConTEXt meeting 8 to be published For ICC profiles a good starting point is 5 the problems about fonts are described by C Beccari in 9 and 10 References All links were verified between 2010 10 19 and 2010 10 22 1 http en wikipedia org wiki PDF A 2 http www pdfa org doku php id pdfa en techdoc 3 www tug org applications pdftex calculat pdf 4 http www digitalpreservation gov formats fdd fdd000125 shtml 5 http en wikipedia org wiki ICC profile 6 http wiki contextgarden net PDFX 7 http www pragma ade com general manuals hybrid pdf 8 http meeting contextgarden net 2010 talks 9 http www guit sssup it downloads Beccari Pdf archiviabile pdf 10 http dw tug org pracjourn 2010 1 beccari
98. hing Company Inc year 2003 address Reading Massachusetts 10 MAPS 41 edition 8 Het input document gevolgd door de output documentclass article pagestyle empty setlength textwidth 220pt usepackage round natbib begin document This is a very short article It cites the classical databases book cite Date2003 bibliographystyle plainnat bibliography bibfile end document This is a very short article It cites the classical databases book Date 2003 References C J Date An Introduction to Database Sys tems Addison Wesley Publishing Company Inc Reading Massachusetts 8 edition 2003 En dan nu de biblatex versie documentclass article pagestyle empty setlength textwidth 220pt usepackage natbib style authoryear biblatex bibliography bibfile begin document This is a very short article It cites the classical databases book cite Date2003 printbibliography end document This is a very short article It cites the classical databases book Date 2003 References Date C J 2003 An Introduction to Database Systems 8th ed Reading Massachusetts Addison Wesley Publishing Company Inc Er zijn een paar verschillen te constateren Piet van Oostrum Ten eerste in de LalpX input staat het bibliography commando in de preamble en niet meer op de plaats waar de bibliografie komt Op die plaats staat het printbibliography commando
99. howing some practical examples About the typographic style of this paper I will follow these simple rules I will avoid footnotes and citations on running text and I will try to limit lists e g only itemize and enumerate and figures the last section before the References one will collect all citations The PDF A 1 ISO Standard Probably one of the best known PDF versions is PDF 1 4 around 2001 almost ten years ago maybe because the companion Acrobat 5 0 was a robust program and the PDF Reader was freely available for several platforms both as a program and as plug in for browsers We keep having a huge amount of electronic documents that are in PDF 1 4 hence we should not be surprised if Adobe pushed it as reference for document archiving What follows is a verbatim copy from http www digitalp reservation gov formats fdd fdd000125 shtml and it s a good description PDF A 1 is a constrained form of Adobe PDF version 1 4 intended to be suitable for long term preservation of page oriented documents for which PDF is already being used in practice The ISO standard ISO 19005 1 2005 was developed by a working group with representatives from gov ernment industry and academia and active sup port from Adobe Systems Incorporated Part 2 of ISO 19005 as of September 2010 an ISO Draft In ternational Standard extends the capabilities of Part 1 Itis based on PDF version 1 7 as defined in ISO 32000 1 rather than PDF version 1 4
100. hy hx uniformdeviate size hy withcolor rgb vertical line Line thickness is varied as follows pickup pencircle scaled uniformdeviate 1 xpw The most difficult part is the color which I let vary a little around the chosen value in order to generate a shade but gives the main color impression I chose a multi plicative factor uniformdeviate 2 and called this spread To finish it up I clip and border first to the rectangle next to the oval and finally to the diamond all border increasingly the same pattern Mondriaan alike Fall 2009 CGL if scantokens mpversion gt 1 005 outputtemplate else filenametemplate fi j eps prologues 3 beginfig u 180 rectangle u x v golden ratio proportion v 1 618u size 10 pw 5 n 500 number of randoms path p r rectangle p o oval p d diamond picture pic r pic o pic d signature defaultfont ptmr8r label rt cgl okt 9 2 75u 4pw 2pw seed may be shown instead signature currentpicture currentpicture nullpicture color rgb colorofchoice parameters for Sveta randomseed 1007 colorofchoice 8xred 2 green 7 blue roze for j 0 upto n pickup pencircle scaled uniformdeviate 1 pwxpt linecap squared hx uniformdeviate u hy uniformdeviate v rgb 8x uniformdeviate 2 red 2x uniformdeviate 2 green 7 uniformdeviate 2 xblue draw hx hy hx hy uniformdeviate size withcolor rgb hx uniformdeviate
101. iching it progressively is insufficient it is better for oral defences announcement to be shown with respect to defences chronological order and this order is un known when projects are proposed Likewise we may wish to present the grades received by students accord ing to the decreasing order of these grades or according to students alphabetical order other criteria being pos sible too In these cases we have to perform a sort operation before typesetting the result These examples are not limitative other operations related to classical programming may be needed if we are only interested in a subset of the information concerning projects for example extracting projects proposed by companies not by people working at our university It is well known that TEX s language is not very suit able for tasks directly related to programming A better idea is to use a format suitable for information man agement with interface tools serving several purposes Database formats could be used but presently the in disputable standard to model such formats is XML pro viding a rich toolbox for this kind of task In particular this toolbox provides the XPath language 38 this lan guage s expressions allow parts of an XML document to be addressed precisely But these tools related to XML have advantages and drawbacks we are going thoroughly into these points in this article which is a revised updated and extended versi
102. idow then weeping sore in the night the candle searching the pale expanse for form for the suggestion of form a balm for the anxious eye weeping she weepeth A ffanato means anguished Piangevole means plaintive Paul Isambert Weepeth is an archaic form of weeps Haltiwanger Toward Subtext NAJAAR 2010 45 A Mutable Translation Layer for Multi Format Output Abstract The demands of typesetting have shifted significantly since the original inception of TEX Donald Knuth strove to de velop a platform that would prove stable enough to produce the same output for the same input over time assuming the absence of bugs Pure TEX is a purely formal language with no practical notion of the semantic characteristics of the text it is typesetting The popularity of LATEX is largely related to its attempt to solve this problem The flexibility of Con TEXt lends it to a great diversity of workflows How ever document creation is not straight forward enough to lend itself to widespread adoption by a layman audience nor is it particularly flexible in relation to its translatability into other important output formats such as HTML Subtext is a proposed system of generative typesetting designed for pro viding an easy to use abstraction for interfacing with TEX HTML and other significant markup languages and output formats By providing a mutable translation layer in which both syntax and the
103. iedereen weggelegd het aanpassen van een stijl zal in ieder geval een stuk mak kelijker zijn Ook alle commando s voor citaties kunnen gemakkelijk worden aangepast Biblatex is niet compatibel met een groot aantal pak ketten die iets met bibliografie n doen zoals babelbib bibtopic bibunits chapterbib multibib en meer Maar de functionaliteit van de hier genoemde pakketten is in biblatex aanwezig In ieder geval ondersteunt bib latex opgesplitste bibliografie n bijvoorbeeld op topic meerdere bibliografie n in een document bibliografie n per hoofdstuk sectie en dergelijke Ook is biblatex niet compatibel met het pakket ucs zodat gebruikers van een aantal talen met een niet latijns schrift helaas dit niet kunnen gebruiken tenzij ze gebruik maken van XeTEX Overigens is het gebruik van BibTeX met dit soort schriften ook problematisch Verder is biblatex wel gelocaliseerd dat wil zeggen dat het verschillende talen ondersteunt en kan het gebruik maken van het babel pakket Jurabib en natbib zijn ook incompatibel met biblatex en de functionaliteit van deze pakketten is slechts ge deeltelijk aanwezig in biblatex zelf maar zie ook ver derop Hierbij een voorbeeld waarbij ik eerst een document met natbib en de klassieke Bib IEX oplossing geef en daarna de oplossing met biblatex De Bib IEX entry is Book Date2003 author Date C J title An Introduction to Database Systems publisher Addison Wesley Publis
104. illende discussielijsten mailing lists over TEX gerelateerde onderwerpen zowel voor beginners als gevorderden algemeen en specialistisch De FTP server ftp ntg nl waarop vele honderden megabytes aan algemeen te gebruiken TEX producten staan De WWW server wuw ntg nl waarop algemene informatie staat over de NTG bijeenkomsten publicaties en links naar andere TEX sites Korting op buitenlandse TEX conferenties en cursussen en op het lidmaatschap van andere TEX gebruikersgroepen Lid worden kan door overmaking van de verschuldigde contributie naar de NTG giro zie links vermeld IBAN zowel als SWIFT BIC code en selecteer shared cost Daarnaast dient via www ntg nl een informatieformulier te worden ingevuld Zonodig kan ook een papieren formulier bij het secretariaat worden opgevraagd De contributie bedraagt 40 voor studenten geldt een tarief van 20 Dit geeft alle lidmaatschapsvoordelen maar geen stemrecht Een bewijs van inschrijving is vereist Een gecombineerd NTG TUG lidmaatschap levert een korting van 10 op beide contributies op De prijs in euro s wordt bepaald door de dollarkoers aan het begin van het jaar De ongekorte TUG contributie is momenteel 65 MAPS bijdragen kunt u opsturen naar maps ntg nl bij voorkeur in BIFX of ConTEXt formaat Bijdragen op alle niveaus van expertise zijn welkom Productie De Maps wordt gezet met behulp van een EIEX class file en een ConTEX
105. ing NAJAAR 2010 7 those other errors Contrary to the other fields local file selection is not persistent across form submits HTTP URL This asks the system to do a wget of an archive file on a specific URL which could be either HTTP or FTP If you need remote log in information to access the file please encode the user name and password in the URL exactly as you would do when using wget on the command line SVN URL This asks the system to do a svn checkout on a specific URL In this case you may also need SVN Username and SVN Password Also some repositories may need anonymous as user name for anonymous access The top level checkout folder will be stripped away before creating the package This is so that you can e g give http foundry supelec fr svn metapost trunk texmf as URL without getting an extra directory level GIT URL This asks the system to do a git clone on a spe cific URL It is very similar to SVN URL just us ing a different versioning system In this case you may also need GIT Branch Please verify package contents The first time the edit form is loaded this will only display a message but after the initial submit as suming everything else went well it will display the full list of files that will become the source of your package Please check this list carefully TLContrib does run some tests on the package contents and will refuse to accept package sources that are horribly wrong but it does
106. ion LuaTEX has much to offer utf 8 encoding non tfm fonts a comfortable programming language Access to TEX s internals is to me one of its most valuable features it enables the user to do things that were previously unthinkable and gives such control over ty pography that the software s limitations almost vanish as if we were working on a hand press except we don t manipulate metal but nodes A final note in this paper functions have been added to callbacks with LuaTEX s bare mechanism If two functions are added to the same callback this way the second erases the first To do this properly the luatexbase package can be used for plain IEX and TEX and it is taken care of in ConTEXt NAJAAR 2010 43 The next page shows examples of our three programs First comes the page color displaying a typeset text and its translation to shades of grey the second text uses font expansion to show the resulting improvement in justification Then are examples of underlining and marginal notes The text used is the first page of Robert Coover s novel The Adventures of Lucky Pierre Paul Isambert Universit de la Sorbonne Nouvelle France zappathustra at free dot fr 44 MAPS 41 In the darkness softly A whisper becom ing a tone the echo of a tone Doleful incip ient lament blowing in the night like a wind like the echo of a wind a plainsong wafting silently through the windy chambers of the night wafting unisonously
107. is derived from TeX by adding or redefining 78 MAPS 41 Jean Michel Hufflen some primitives Plain IEX and LaTeX are formats XjIEX and LuaTEX are engines 17 eXtensible HyperText Markup Language XHTML is a reformulation of HTML the original language of Web pages using XML conventions 31 is a good introduction to these languages 18 eXtensible Stylesheet Language Formatting Objects 19 16 is written in French If you would like a similar text in English 14 is an abridged version 20 Roughly speaking a block in XSL FO is analogous to a minipage in LaT X 16 1 2 21 XSL FO s footnotes can be compared with Plain TEX s Nfootnote command as shown in Fig 3 22 That is done in standard LaTeX class but not universal as an example related to TEX s community the arstexnica class used for articles of the ArsTEXhica journal published by qr Gruppo Utilizzatori Italiani di TEX the Italian speaking TEX users group does not put leaders just above footnotes 23 We personally use Apache FOP Formatting Objects Processor 1 fop pulps result fo pulps result pdf generates a PDF Portable Document Format file from a source text in XSL FO 24 Structured Query Language A good introductory book about it is 29 25 A short introduction to XQuery is given in 17 26 For Let Where Order by Return the keywords used throughout such expressions 27 The XQuery processor we have used for this exam
108. itor which renders the HTML output of Markdown text in real time within the same browser window This functionality is likely constrained by the speed of the Rakudo Perl 6 imple 48 MAPS 41 mentation However it is conceivable that the standard Subtext syntax can be parsed in JavaScript This means that highly customized workflows would not be able to enjoy a real time feedback interface in the near term future This seems to be a small trade off for the kind of flexibility this system can enable in generative typeset ting and could easily find itself solved over the course of the continuance of Moore s Law Request For Comments Though Subtext aims to be useful for dealing with n 1 different output formats initial development will concern itself with simply HTML and ConTEXt outputs Together these two encompass the primary formats of concern ATEX ePub and others can easily be added by simply defining a new set of effects The standard syntax has yet to be designed Any comments or suggestions in this regard or concerning any of what has been discussed will be very useful At this early conceptual stage where nothing is locked down except for the core ideas there is a great poten tial for shaping the eventual system without worrying about any legacy functionality Please do not hesitate to send me your thoughts Notes 1 The thesis titled Grammars of Process Agency Collective Haltiwanger Becoming and the Organization
109. l Relax NG http www oasis open org committees relax ng 2002 Jonathan FINE TEX Forever In Proc EuroTEX 2005 pp 150 158 Pont a Mousson France March 2005 Michel GoossENS and Sebastian RAHTZ with Eitan M GURARI Ross Moore and Robert S SuTOR The LaTEX Web Companion Addison Wesley Longman Inc Reading Massachusetts May 1999 Hans Hacen ConTEXi the Manual Novem ber 2001 http www pragma ade com general manuals cont enp pdf Hans HAGEN The Luafication of TEX and ConTEXt In Proc BachoTEX 2008 Conference pp 114 123 April 2008 Hans HAGEN Dealing with XML in ConTEXt MkIV MAPS Vol 37 pp 25 39 2008 Jean Michel HUFFLEN MIBIBIfX s Version 1 3 TUGboat Vol 24 no 2 pp 249 262 July 2003 Jean Michel HUFFLEN Introduction to XSLT Biuletyn GUST Vol 22 pp 64 In Bacho TEX 2005 conference April 2005 Jean Michel HUFFLEN Advanced Techniques in XSLT Biuletyn GUST Vol 23 pp 69 75 In BachoTEX 2006 conference April 2006 Jean Michel HUFFLEN Introducing LaTEX users to XSL FO TUGboat Vol 29 no 1 pp 118 124 EuroBachoTEX 2007 proceedings 2007 Jean Michel HUFFLEN XSLT 2 0 vs XSLT 1 0 In Proc BachoTEX 2008 Conference pp 67 77 April 2008 Jean Michel HUFFLEN Passer de LaTeX a XSL FO Cahiers GUTenberg Vol 51 p 77 99 Octobre 2008 17 18 23 24 Jean Michel Hufflen Jean Michel HUFFLEN Intro
110. lculated like this echo taco test 0 64 0 md5sum c7Q04f499eB86edd54fca36fbdabc973e The value of lt md5 gt is therefore c704F499e086e0d54fca36fbOabc973e lt version gt This is the version field of the new release Note if this contains spaces or other characters that cannot be used in URLs then you either have to escape the version string in the URL or use POST instead of GET In any case do not escape the ver sion while calculating the check sum string There is no need to do any URL escaping here so the value of version will be 0 64 0 Using the example variables given above the final URL that would have to be accessed is again without line breaks or spaces http tlcontrib metatex org cgi bin package cgi action notify key luatex i386 linux check c704f499e086e0d54fca36fbOabc973e version 0 64 0 Accessing this URL will cause TLContrib to fetch the HTTP or SVN or GIT URL source in the package s top level revision regardless of what its publication state is and create a new revision based on the fetched file s and the supplied version string All other fields will remain exactly the same as in the original top level revision This new package revision will appear in the web interface just like any other revision there is nothing special about it other than what is already mentioned Final remark TLContrib is a fairly new project and some improve ments are definitely possible especially in the edi
111. math n 3 14159 This means that when you say context a b c d e f the variables b till f are passed to the format and when the format does not call for them they will not end up in your output context s ks ks 1 2 3 context 1 2 3 The first line results in the three numbers being typeset but in the second case only the number 1 is typeset Why we need functions In a previous section we introduced functions as arguments At first sight this feature looks strange but you need to keep in mind that a call to a context function has no direct consequences It generates TEX code that is executed after the current Lua chunk ends and control is passed back to TEX Take the following code context framed frame on offset 5mm align middle 3 context input knuth We call the function framed but before the function body is executed the arguments get evaluated This means that input gets processed before framed gets done As a result there is no second argument to framed and no content gets passed an error is reported This is why we need the indirect call context framed frame on align middle om function context input knuth end This way we get what we want 55 56 MAPS 41 Hans Hagen Thus I came to the conclusion that the designer of a new system must not only be the implementer and first large scale user the designer should also write the first user
112. mic Language Scheme HOSC Vol 11 no 1 pp 7 105 August 1998 Jonathan KEW XjIEX in TEX Live and be yond TUGboat Vol 29 no 1 pp 146 150 EuroBachoTEX 2007 proceedings 2007 Donald Ervin KNUTH Computers amp Typesetting Vol A The TEXbook Addison Wesley Publishing Company Reading Massachusetts 1984 Alex MARTELLI Python in a Nutshell 2nd edition O Reilly July 2006 Jim MELTON and Alan R Simon Understanding the new SQL Morgan Kaufmann 1993 Frank MITTELBACH and Michel Goossens with Johannes BRAAMS David CARLISLE Chris A Row LEY Christine DETIG and Joachim SCHROD The LaTEX Companion 2nd edition Addison Wesley Publishing Company Reading Mas Processing Computed Texts sachusetts August 2004 Chuck Musciano and Bill KENNEDY HTML amp XHTML The Definitive Guide 5th edition O Reilly amp Associates Inc August 2002 Erik T Ray Learning XML O Reilly amp Asso ciates Inc January 2001 Denis B ROEGEL Anatomie d une macro Cahiers GUTenberg Vol 31 p 19 27 D cembre 1998 THE UNICODE CONSORTIUM The Unicode Stan dard Version 5 0 Addison Wesley November 2006 The UNICODE CONSORTIUM http unicode org reports tr9 Unicode Bidirectional Algorithm Unicode Standard Annex 9 March 2008 Eric VAN DER VLIST Comparing XML Schema Languages http www xml com pub a 2001 12 12 schemacompare html Decem ber 2001 W3C Extensible Stylesheet Language
113. mlns fo http uww w3 org 1999 XSL Format gt lt fo layout master set gt lt fo layout master set gt Jean Michel Hufflen fo page sequence master reference simple page font family serif font size medium text align left gt fo flow flow name xsl region body fo list block provisional distance between starts 20mm provisional label separation 3mm fo list item fo list item label start indent 10mm end indent label end gt fo block 56 fo block fo list item label fo list item body start indent body start gt lt fo block gt Repel lt fo footnote gt fo inline font size x small vertical align super gt lt fo inline gt fo footnote body fo block text align last justify fo leader leader pattern rule fo block fo block font size xx small fo inline font size xx small vertical align super gt lt fo inline gt Book s title for pulp 56 lt fo block gt lt fo footnote body gt lt fo footnote gt lt fo block gt lt fo list item body gt lt fo list item gt The Deadly Dwarf fo list block fo flow fo page sequence lt fo root gt Figure 5 How to put a footnote in XSL FO see the equivalent Plain TEX source text in Fig 3 mark Fig 5 provides the result of applying an XSLT stylesheet providing an XSL FO text for our example The first child of the fo footnote element gives the
114. n after As the sequence has a rather low probablility of showing up in a TEX source file this kind of escaping is part of the game So all the following cases are valid def test oeps oeps def test oeps oeps def test main oeps main oeps def test oeps 1 oeps 1 def test oeps oeps When you use the braced variant all characters except braces are acceptable as name optherwise only lower case and uppercase characters are permitted Normally LuaTgxX uses a couple of special tokens like and _ In a macro definition file you can avoid these by using primitives NAJAAR 2010 amp aligntab alignmark NUsuperscript Usubscript Ustartmath Ustopmath Ustartdisplaymath Ustopdisplaymath Especially the alignmark is worth noticing using that one directly in a macro definition can result in un wanted replacements depending on whether a match can be found In practice the following works out well def test oeps test oeps halign cr oeps cr You can use UTF 8 characters as well For practical reasons this is only possible with the braced variant def bla b14 bla b14 There will probably be more features in future versions but each of them needs careful consideration in order to prevent interferences Utilities There is currently one utility or in fact an option to an existing utility mtxrun script interface pre
115. n dat je meteen een katern hebt Dat vind ik een prachtige vondst Op A4 kan het maar het kan ook groter en als ik een betaalbare A3 printer koop kan ik op die manier simpel een originele presen tatie maken van tekst en fotografie Mijn vondst van de dag om thuis wat mee te gaan doen Frans Goddijn
116. nalfigure stopluacode stopTEXpage stoptext As we can see the XObject has now an ICCBased color space 15 Q obj lt lt Alternate DeviceRGB Filter FlateDecode N 3 Length 3144 gt gt stream endstream 16 Q obj ICCBased 15 0 R endobj 17 obj lt lt Type XObject Luigi Scarso Subtype Image Width 640 Height 400 BitsPerComponent 8 Length 9948 ColorSpace 16 R Filter DCTDecode gt gt stream endstream Once the image with the correct color space is wrapped in a PDF file rgb icc srgb pdf in this case we can use it in our documents setupbackend format pdf a 1a 2005 level 0 profile default_cmyk icc default_gray icc J setupstructure state start starttext startchapter title Test startparagraph Nexternalfigure rgb icc srgb pdf width 0 AN textwidth stopchapter stoptext which is again a valid PDF A Tagged PDF Next we must enable the tagging system with setupstructure state start method autol ConTEXt MkIV permits the author to define his own document markup language the tags used inside the PDF document but of course we also need the associ ated TEX macros This naturally needs to start with a sort of XML document setupstructure state start method none starttext startelement document startelement chapter opes startelement p input ward stopelement par stopelement stopelement stoptext The internal
117. ne We then set the note s height and depth to 0 so it doesn t take up space on the page Since the kern becomes the head of the list we have to explicitly set note list to it otherwise TEX still thinks the previous head is the good one local kern node new KERN 1 kern kern upward note height item depth node insert before note list note list kern note list kern note height note depth Q Finally we insert the note and set its horizontal shift here it goes into the right margin but this should depend on whether the page is even or odd and reset first and remainingheight the latter to upward so the vertical shift of the current note if any is taken into account for the following one The rest of the code is the end of the attr conditional false so we add the line s height to the remainingheight and the end of the main loop node insert after head item note note shift tex hsize tex sp lem first true remainingheight upward else remainingheight remainingheight item height end end item item prev end end When a page is found good before we ship it out and before we add inserts too we feed it to the function so notes are added For instance a very simple output routine would be output directlua process_marginalia tex box 255 list shipout box255 The important part is of course the Lua code Three things you can do with LuaTEX Conclus
118. ne in node traverse id HLIST head do underline line list line glue order line glue set line glue sign end callback register post linebreak filter nil return head end This first function retrieves all lines in the paragraph and feeds their content to the underline function along with information about glue setting It then clears the callback and returns the head This part is nothing we haven t seen in the previous code Some nodes might have inherited the attribute s value although we don t want to underline them leftskip rightskip and Nparfillskip These are glue nodes and their subtypes are 8 9 and 15 respec tively The following function is meant to filter them out Note versions prior to v0 62 had a bug where leftskip and rightskip were not properly identified so item subtype 7 should be added to the or condi tional below Both IEX Live 2010 and Mik TEX 2 9 uses v0 60 so they are affected local good item function item if item id GLUE and item subtype 8 or item subtype 40 MAPS 41 or item subtype return false else return true end end 15 then Now here s how the underline Lua function starts underline function head order ratio sign local item head while item do if node has_attribute item 100 and good_item item then local item_line node new RULE item_line depth tex sp 1 4pt item line height tex sp 1pt The while loop is basically the
119. now accept braced file names removing the need for double quote escapes in case of files with spaces in their name a The endlinechar can now be set to any value between 0 and 127 a The new primitives aligntab and alignmark are aliases for the characters with the category codes of amp and in alignments respectively a latelua is now allowed inside leaders To be used with care because the lua code will be executed once for each generated leader item a The new primitive gleaders provides globally aligned leaders These leaders are aligned on one side of the main output box instead of to the side of the immediately enclosing box a From now on LuaTpx handles only 4 direction specifiers TLT latin TRT arabic RTT cjk and LTL mongolian Other direction specifiers generate an error o The pdfcompresslevel is now effectively fixed as soon as any output to the pdf file has occurred a pdfobj has gained an extra optional keyword uncompressed This forces the ob ject to be written to the pdf in plain text which is needed for certain objects con taining meta data a Two new token lists are provided pdfxformresources and pdfxformattr as an alternative to pdfxform keywords a The new syntax pdfrefxform width lt dimen gt height lt dimen gt depth lt dimen gt lt formref gt scales a single form object using similar principle as with pdfximage depth alone doesn t scale it shifts vertically
120. nstances while the second category normally concerns some text to be typeset Strings are interpreted as TEX input so context mathematics sqrt 2 3 or if you don t want to escape context mathematics sqrt 2 3 is okay As TEX math is a language in its own and a de facto standard way of in putting math this is quite natural even at the Lua end Spaces and Lines In a regular TFX file spaces and newline characters are collapsed into one space At the Lua end the same happens Compare the following examples First we omit spaces context left context middle context right leftmiddleright Next we add spaces context left context middle context right left middle right We can also add more spaces context left context middle context right left middle right In principle all content becomes a stream and after that the TEX parser will do its normal work collapse spaces unless configured to do otherwise Now take the fol lowing code context before context word 1 context word 2 52 MAPS 41 Hans Hagen context word 3 context after beforeword 1word 2word 3after Here we get no spaces between the words at all which is what we expect So how do we get lines or paragraphs context before context startlines context line 1 context line 2 context line 3 context stoplines context af
121. nt function which writes a raw data into a pdf content stream So what s the difference The difference is that in latelua chunks we know the current position on the page it is accessible through pdf h and pdf v fields We can therefore use the po sition coordinates explicitly in the literal content To simulate the behavior of pdfliteral one can say latelua local bp 65781 local cm function x y return string format 1001 4f 4f cm string n x bp y bp end pdf print page cm pdf h pdf v special contents pdf print page cm pdf h pdf v Having the latelua mechanism and the pdf print function I don t need and don t use pdfliterals any longer Graphic state Obviously writing raw pdf data is supposed to be covered by lower level functions Here is an example of how I set up graphic features in the higher level interface pdfstate local cmyk color cmyk cmyk orange Q 8 cmyk red cmyk yellow 2 fillcolor cs orange opacity 30 linewidth 1 5pt rotate 30 Pawet Jackowski The definition of pdfstate is something like long def pdfstate 1 latelua setfenv 1 pdf 1 The parameter text is Lua code setfenv call simply allows me to omit the pdf prefix before variables Without that I would need latelua pdf fillcolor pdf opacity 30 pdf linewidth pdf rotate 30Q pdf color cmyk orange 1 5pt pdf is a stan
122. o just after wow also ooops has come In this article I focus on things rather tightly related to pdf graphics as I find that part the most interesting at least in a sense of taking advantage of Lua and LuaTpx functionalities pdfliteral retires TEX concentrates on texts providing only a raw mech anism for document graphics features such as colors transparencies or geometry transformations pdf IEX goes a little bit further providing some concept of a graphic state accessible for the user But the tools for the graphic control remain the same We have only specials in several variants What s wrong with them The things they do behind the scenes may be harmful def flip 1 pdfliteral q 1 1 20 6 cm hbox to pt 1 hss pdfliteral Q hbox to2 bp hss def red 1 pdfliteral page q 0 1 1 k 1 pdfliteral page Q The first macro applies a transformation to a x3 object the second applies a color If used separately they work just fine If used as flip red text it s still ok 1x94 Now try to say red flip text The text is transformed and colored as expected But all the rest of the page is broken as its content is com pletely displaced And now try red flip text with a question mark at the end of a parameter text Everything is perfectly ok again 1X21 Here is what happens When pdfliteral occurs pdfTEX outputs a whatsit This whatsit will cause writ ing the data int
123. o the output pdf content stream at the shipout time If the literal was used in a default mode with no direct or page keywords pdf TEX first writes a transformation from lower left corner of the page to the current position then prints the user data then writes another transformation from the current posi tion back to the pdf page origin Actually the transform restoration is not performed immediately after writing the user data but on the beginning of the very next textual node So in the case of several subsequent literal whatsit nodes the transform may occur not where the naive user expects it Simplifying the actual pdf output we expected something like q011 k save set color 1 0 0 1 80 750 cm shift to TeX pos q 1 0 1 20 6 cm save transform BT ET put text Q restore transform 1 0 0 1 80 750 cm shift redundant Q restore color but we got q 0110k 1 0 0 1 80 750 cm q 1 090 1 20 6 cm 26 MAPS 41 BT ET Q Q 1 001 80 750 cm In general the behavior of pdfliterals depends on the surrounding node list There are reasons behind it Nevertheless one can hardly control lists in pdf IEX so it s hard to avoid surprises Does LuaTEX provide something better then pdfliterals It provides latelua Very much like pdfliteral a latelua instruction inserts a whatsit At the time of shipout LuaTEX executes the Lua code provided as an argument to latelua The code may call the standard pdf pri
124. of TEX Live And a warning Executable packages are not necessarily available for all platforms on TLContrib Unfortunately it appears that the current TEX Live update manager is not smart enough to correctly detect versioning in dependencies In practice this means that you should not update packages that depend on executable package updates unless the actual executable package update is also available on TLContrib for your platform In order to use TLContrib as an extra repository in the TEX Live 2010 package manager t1mgr there are two options depending on whether you prefer to use the command line version or the GUI version of the TEX Live 2010 package manager Graphical interface usage In the GUI version of the package manager select the menu item Load other repository from within the tlmgr menu Set the value to http tlcontrib metatex org 2010 There is currently no way to save this setting Besides not being able to save the TLContrib setting when using the graphical user interface it is not always easy to see whether executable package updates are available For this reason you should consider using the command line version of the package manager for use with TLContrib even if you are accustomed to using the GUI interface Taco Hoekwater Command line usage The simplest approach is to just start tlmgr from the command line with an extra option tlmgr repository http tlcontrib metatex org 2010 I
125. on of 19 Reading this article requires only basic knowledge about JA Tpx and the tools related to XML A simple example The examples given in the introduction are real appli cations and belong to our framework Microsoft Excel can generate XML filesf and we personally manage stu dents projects by means of a master file using XML like syntax However for sake of simplicity we consider an easier example for the present article pictured in Figure 1 This XML text a file ds xml describes some items of a series of stories Doc Savage first published as pulps in the 1930 s then republished as pocket books in the 1960 s As it can be noticed in the given exam ple the original publication order for pulps was not followed by the series of pocket books In addition some stories were unpublished as pulps e g The Red Spider or retitled when published as pocket books e g The Deadly Dwarf previously entitled Repel in which case the pulp s title is given as the pulp element s con tents More precisely if a pulp element s contents is empty this means that the pulp s title was the same as Processing Computed Texts lt story list gt story lt title gt The Deadly Dwarf title lt pulp nb 56 gt Repel lt pulp gt pocket book nb 28 gt story story lt title gt The Land of Terror title pulp nb 2 gt pocket book nb 8 gt story story l
126. onderaardse gang Het terrein is slechts een dag per jaar toegankelijk voor het publiek Als ik voorbij de slagbomen ben waar mijn paspoort is gecontroleerd denk ik dat ik op afstand kan zien wie militair is atletische stap en wie van de ntg Binnen zijn de eersten bezig met de beamer die wel aan staat maar niet wil luisteren naar onze laptops Gelukkig heeft Hans zijn eigen beamer mee een klein dapper ding in een handzaam koffertje John Haltiwanger John Haltiwanger zou als eerste spreken maar hij heeft zijn paspoort niet bij zich en moet dus terug naar Amsterdam om die te halen Middags geeft hij zijn presentatie over een manier om po zie te typesetten Samen met een Spaanse vriend maakt hij muziek de een rapt in het Engels en de ander in het Spaans en in het boekje bij hun cd moeten beide talen correct naast elkaar komen te staan Omdat je vandaag de dag als beginnende musicus je muziek zowat weg moet geven om publiek te werven moet je drukwerk goed verzorgd zijn om net die extra aandachtswaarde te bereiken vertelt hij Tijdens zijn demonstratie gaat er wat mis op zijn computer en zo n moment vind ik erg spannend Ieder een reageert anders Ik heb eens een van de sprekers zich zien verliezen in kalme concentratie In serene rust ging ze haar setup na tot alles werkte en de zaal wachtte het in stilte af Arthur Reutenauer Ihave to kill it I guess zegt later in de middag Arthur Reutenauer tijdens zijn live
127. oor chemici namelijk chem acs American Chemical Society chem angew Angewandte Chemie chem biochem Biochemistry chem rsc Royal Society of Chemistry Maar ook andere chemische publicaties vallen hieronder Het pakket is geschreven door Joseph Wright biblatex nature Dit pakket implementeert de citatiestijl voor het tijd schrift Nature Hierbij worden superscripts gebruikt voor de citatie echter zonder dat er een voetnoot bij NAJAAR 2010 11 hoort Hiervoor moet wel het commando autocite gebruikt worden in plaats van cite anders wordt het nummer tussen vierkante haken gezet Het pakket is ook geschreven door Joseph Wright documentclass article pagestyle empty setlength textwidth 220pt Nusepackage natbib true style nature biblatex bibliography bibfile begin document This is a very short article It cites the classical databases book autocite Date2003 printbibliography end document This is a very short article It cites the classical databases book References 1 Date C J An Introduction to Database Systems 8th ed Addison Wesley Publishing Company Inc 2003 biblatex science Het begint een beetje saai te worden maar voor het tijdschrift Science is er het pakket biblatex science even eens door Joseph Wright Citaties worden als nummers met ronde haakjes afgedrukt biblatex apa Biblex apa implementeert de citatie en bibliografiestijl voor de
128. operator variant Why a PostScript variant of the MetaPost program allows larger numbers seed eg 22121943 more convenient clipping operator library no invoke of MP easier experimenting with color shade improved code Ka OS ce AA m ke m In this variant I generate only one framed picture triggered by the value 0 1 or 2 for the last parameter on the stack where 0 Square 1 Oval 2 Lozenge The size is 420 by 420 1 618 and positioned with the lower left corner at 100 50 translate for a centered result The complete birthday date ddmmyyyy can be supplied The code is not a direct translation because of the language differences and because I matured in coding and was after a library operator The thickness of the strokes are obtained as follows w maxwidth unifrmdev def w setlinewidth The line pieces are positioned symmetrically NAJAAR 2010 87 88 MAPS 41 Kees van der Laan laux 1 2 div def xaux laux sub yaux moveto xaux laux add yaux lineto w setlinewidth color setrgbcolor stroke h line The spread in color has been implemented as if an rgb value 0 it is changed into eps 0 1 and the resulting value c q the original non zero value is multiplied by the spread factor spread 2 unifrmdev mul def interval 0 2 color r Q eq eps r ifelse spread g eq eps g ifelse spread b eq eps b ifelse spread def The strokes are in a shade of the desired color The rgb values are printed at the
129. or the use of CTAN is that creating a large distribution like TEX Live takes a lot of work and the number of volunteers is lim ited Having a single place to check for new pack age updates is a lot easier because this process can be automated to a large extent Using many sepa rate sources would make this task much more com plicated a TEX Live ships binaries for 19 different computer platforms and something like 300 binaries need to be compiled for each of those Coordinating the task of preparing these binaries is a major effort o Because TEX Live is not just a network installation but also shipped on DVD it is important that the included packages and binaries are as stable as pos sible After all there is no guarantee that the DVD users will ever update their system after the initial installation Nevertheless the limitations of TEX Live mean that there is room for extension This is the reason for the existence of TLContrib On TLContrib anything that is freely distributable is acceptable so packages that are not on CTAN are also fine and TLContrib can and will contain updates to executables just not necessarily for all platforms This is possible because the two major limitations of TEX Live do not exist in TLContrib Firstly TLContrib is a network only distribution without the limitations introduced by the physical medium Secondly the prob lem of lack of human resources is solved by offloading the burden of cre
130. ordig een programma om pakketten automatisch te updaten net als MIKTEX dat heeft Helaas was het niet mogelijk om automatisch te updaten van TEXLive 2009 naar TEXLive 2010 Hopelijk komt dit ook een keer in een toekomstige versie Als je namelijk je installatie regelmatig laat updaten heb je natuurlijk bij de volgende versie een groot gedeelte al ge nstalleerd In dit licht is het eigenlijk niet zo interessant om een lijst van nieuwe of bijgewerkte pakketten te geven Daarom beperk ik me maar tot het beschrijven van inte ressante ontwikkelingen De meeste van de hieronder beschreven pakketten zijn onderdeel van de TEXLive en MiKTgx distributies Biblatex Biblatex is een pakket dat de functionaliteit van Bib IEX voor het grootste gedeelte implementeert in LaTpX Het maken van BibTEX stijlen is erg lastig omdat Bib TEX een programmeertaaltje gebruikt dat gebaseerd is op opera ties op een stack een techniek die de meeste mensen niet beheersen en die bovendien gemakkelijk tot fouten leidt Het implementeren van deze stijlen in LaTEX zou gemakkelijker moeten zijn Bij het gebruik van biblatex wordt BibTEX nog steeds gebruikt maar alleen voor het sorteren en het genereren van labels Voor de rest het formatteren van de bibliografische items worden LaTEX macro s gebruikt Hierdoor zou het voor meer men sen mogelijk moeten zijn om bibliografische stijlen te ontwikkelen Misschien is het ontwikkelen van een compleet nieuwe stijl niet voor
131. ot first then remainingheight remainingheight item spec width end Now if we find a line we add its depth if and only if it s not the first one we encounter i e the last one on the page because in that case its depth belongs to the bottom margin Its height is added later if and only if the line doesn t take a note elseif node has field item height then if first then first false else remainingheight remainingheight item depth end If attribute 100 is set to some value then the line takes a note In that case we retrieve the box measure its depth and compare it to the remaining height Note that the depth of the box is all its material barring the height of its first line since we used a vtop which is exactly what we want its first line can t go wrong since it s level with the main text s line from whence it came We also remove the depth of the last line since its going into the bottom margin is perfectly ok local attr node has_attribute item 100 if attr then local note node copy tex boxLattr local upward note depth node tail note list depth if upward gt remainingheight then upward remainingheight upward else upward Q end Paul Isambert Now we insert the note box after the line first we add a negative vertical kern to account for the upward shift possibly 0 plus the line s depth and the note s height i e the height of its first line so it is level with the li
132. oth modify stack 0 and color_push adds code to the stack while color_pop removes it We ll use them to set the color of each line with the exact content of the code added by color_push to be specified each time textcolor function head for line in node traverse_id HLIST head do local glue ratio Q if line glue order Q then Paul Isambert if line glue sign 1 then glue ratio 5 x math min line glue set 1 else glue ratio 5 x line glue_set end end n n color push data 5 glue ratio 8 Here s the beginning of our main function It takes a node as its argument it will be the first node of the list returned by the paragraph builder That node remember denotes the entire list We retrieve each line of text in this list i e each node with id HLIST and check its glue order field if it is 0 then the line has been justified with finite glue and we want to know how bad it is if the line uses infinite glue then it is good by definition as far as glue setting is concerned We access glue sign to know whether stretching or shrinking was used and glue set to know the ratio 1 means the stretch shrink was fully used glues can also be overstretched but we don t allow more than 1 in order to remain in the color range The last line sets the color of the line as the code to color push i e n g where n is a number between 0 and 1 and g a pdf operator setting the color in the grey model In the rest of
133. overall greyness The code that follows takes the metaphor literally it turns a page s color into a real color pattern The idea is to replace each line with a rule of the same height and width and whose color depends on the line s badness If we take 0 as black and 1 as white then a good line gets 5 tight lines approach 0 which represents an overfull line and loose lines tend to 1 an underfull line Now we have paragraphs and pages made of grey bars the less contrast between them the better the page To do this we retrieve the horizontal boxes cre ated by the paragraph builder check the badness of each then replace the box with the desired rule This is easy to do in LuaTpx we register a function in the post_linebreak_filter callback This callback ac cesses the list of nodes output by the paragraph builder i e the lines of text interspersed with interline penalties and glues plus perhaps other things whatsits inserts that we ll ignore Among these nodes we retrieve the ones we want namely the lines of text and replace them as described The code that follows as all Lua code should be fed to directlua or stored in a lua file local color_push local color_pop node new WHAT COL node new WHAT COL color_push stack color_pop stack color_push cmd 1 color_pop cmd 2 Here we have created two new whatsit nodes iden tified by their subtype as the Lua equivalents of pdfcolorstack They b
134. ow been converted back into cweb reinstating the literate documentation This change does not make LuaTgxX a literate program in the traditional sense because the typical C source code layout with pairs of header amp implementation files has been kept and no code reshuffling takes place But it does mean that it is now much easier to keep the source documentation up to date and it is possible to create nicely typeset program listings with indices a There are now source repository revision numbers in the banner again which is a useful thing to have while tracking down bugs For example the LuaTEX binary being used to write this article starts up with This is LuaTeX Version beta 0 60 1 2010042817 rev 3659 a The horizontal nodes that are added during line breaking now inherit the attrib utes from the nodes inside the created line Previously these nodes Vleftskip and rightskip in particular inherited the attributes in effect at the end of the partial paragraph because that is where line breaking takes place a All Lua errors now report file and line numbers to aid in debugging even if the error happens inside a callback a LuaTgxX can now use the embedded kpathsea library to find Lua require files and will do so by default if the kpathsea library is enabled by the format as is the case in plain LuaTEX and the various LuaLaTgx formats o The print precision for small numbers in Lua code the return value of tostring has b
135. ozenge gsave contour clip random pattern will only show up in is clipped to contour maxrandom draw pattern in loop confined to contour xaux hx def yaux hy def position in u x v rectangle laux 1 2 div def xaux laux sub yaux moveto xaux laux add yaux lineto w setlinewidth color setrgbcolor stroke h line xaux hx def yaux hy def laux 1 2 div def xaux yaux laux sub moveto xaux yaux laux add lineto w setlinewidth color setrgbcolor stroke v line repeat grestore end clipping path contour 7 setlinewidth r g b setrgbcolor stroke original color od choice H12pt setfont nstr 8 string def u 85 sub v 10 add moveto RGB show r nstr cvs show show g nstr cvs show show b nstr cvs show u 85 sub moveto Seed show date nstr cvs show grestore end def end Mondrian Mondrian load Q 26 dict put A variant suited for cmyk color values also some 50 lines took me about 10 min utesje When k 0 I did not let it contribute to the spread A brainfag is that cyan absorbs red etc an approach different from the rgb model Example of use PS Mondriaan achtig CGL April 2010 BoundingBox Q 620 790 C PSlib PSlib eps run 22121943 1 Mondrian showpage 22121943 1 Q 1 Mondrian showpage 22121943 Q 1 2 Mondrian showpage 22121943 5 5 5 2 Mondrian showpage EOF 90 MAPS 41 Kees van der Laan No invoke of the MetaPost preprocessor is needed just the use of distiller as part of Adobe s Acrobat or the ps2pdf b
136. playStyleSize These new fields allow proper setting of the size parameters for LuaTEX s withdelims math primitives for which there is no ready replacement in the OpenType MATH table a Artificially slanted or extended fonts now work via the pdf text matrix so that this now also works for non Typel fonts In other words the Lua f slant and f extend font keys are now obeyed in all cases a There is another new allowed key f psname When set this value should be the original PostScript font name of the font In the pdf generation backend fonts inside dfont and ttc collections are fetched from the archive using this field so in those cases the key is required n A related change is made to the font name discovery used by the backend for storage into the pdf file structure now it tries f psname first as that is much less likely to contain spaces than f fontname which the field that 0 40 used If there is no f psname it falls back to the old behaviour o Finally Lua loaded fonts now support a f nomath key to speed up loading the Lua table in the normal case of fonts that do not provide OpenType MATH data TEX side extensions and changes LuaTEX is not actually TEX even though it uses an input language that is very similar hence the quotes in this section s title Some of the following items are new LuaTEX extensions others are adjustments to pre existing pdf TEX or Aleph functionality o The primitives input and openin
137. ple is Saxon 24 Fig 6 s text can be processed by java net sf saxon Query pulps plus xq filename ds xml We also use Saxon as an XSLT 2 0 processor and the stylesheet of Fig 4 can be processed by java net sf saxon Transform s ds xml xsl pulps plus xsl 28 Document Style Semantics Specification Language 29 Standard Generalised Markup Language Now it is only of a historical interest Readers interested in this metalanguage can refer to 3 30 James Clark s Awesome DSSSL Engine 31 We use a different file and a different name for the root element story list sgml because of syntactic reasons empty tags syntax was different in SGML 3 p 259 32 Specification Of a Sequence Of Flow Objects 33 Unless a converter to X HTML is used of course 34 Besides it is well known that TEX recognises only its own formats which complicates cooperation between TEX and other programs 35 New Bibliography STyles 36 MultiLingual BrsTpx Jean Michel Hufflen LIFC EA CNRS 4157 University of Franche Comt 16 route de Gray 25030 Besancon Cedex France Kees van der Laan NAJAAR 2010 79 la Mondrian Abstract Mondriaan has worked most of his live as an abstract painter influenced by the magic real ism of Jan Toorop and by Cubism and Pointillism He was member of De Stijl and has lived in Paris and in New York Some of his work seems to have been composed randomly though he was very precise as wi
138. ple to guess what should go into a TEX Live update package If you are building such an updated package it is always wise to start from the existing TEX Live sources TLContrib accepts no responsibility for package con tents the system does run some sanity checks but ultimately you as maintainer are responsible for cre ating a correctly functioning package Badly behaving or non working packages will be removed on executive decision by the TLContrib maintainer s without prior notice Package creation in detail When you create a new package a short wizard will help present itself to help you set up the package type There are two types of packages those that are up dates of existing TEX Live packages and those that are standalone The wizard screen presents you the choice between these two types and a dropdown listing TEX Live packages The list of existing TEX Live packages is updated daily Once this decision is made it becomes fixed forever the Id field of a package cannot be edited afterwards The ld field is the internal identifier of the package Id s should consist of a single word with a length of at least two characters that only contains alphanumerics dashes and underscores It can optionally followed by a platform identifier which is then separated from the first part by a single dot Taco Hoekwater Also note that when Release state becomes public as explained below it will no longer be possible to edit
139. please let us know and we will contact that person The email address is pearls at gust dot org dot pl Previously collected pearls can be found at http www gust org pl projects pearls The TEX Clinic We hope that more advanced TEXies will help out the TEX Clinic team led by Joanna Ry ko http www gust org pl projects klinika Deadlines and addresses The deadline for abstracts and other proposals is March 28th 2011 The deadline for final papers to appear in the conference materials is April 11th Contributions should be send by email to the Programme Committee prog ebt2011 at gust dot org dot pl The PC is chaired by Bogustaw Jackowski b underscore jackowski at gust dot org dot pl Taco Hoekwater tlcontrib metatex org Abstract TLContrib is a distribution and associated website that hosts contributed supplementary packages for TEX Live The packages on TLContrib are those not distributed in side TEX Live proper for one or several of the following rea sons because the are not free software according to the FSF guidelines because they contain an executable update because they are not available on CTAN or because they represent an intermediate release for testing Anything related to TEX that can not be on TEX Live but can still legally be distributed over the Internet can have its place on TLContrib Keywords TEX Live TLContrib distribution contribution packages Introduction Many of you are familiar with T
140. process whatever mkvi This will convert the given file s to new ones with the default suffix tex Existing files will not be overwritten unless force is given You can also force another suffix mtxrun script interface preprocess whatever mkvi suffix mkiv A rather plain module luatex preprocessor lua is pro vided for other usage That variant provides a some what simplified version Given that you have a luatex plain format you can run luatex fmt luatex plain luatex preprocessor test tex Such a plain format can be made with luatex ini luatex plain You probably need to move the format to a proper location in your TFX tree Hans Hagen 16 MAPS 41 if not modules then modules end modules luat mac version 1 001 comment companion to luat lib mkiv author Hans Hagen PRAGMA ADE Hasselt NL copyright PRAGMA ADE ConTeXt Development Team license see context related readme files local lpegmatch patterns lpeg match lpeg patterns local insert remove table insert table remove local rep sub string rep string sub local setmetatable setmetatable local report_macros logs new macros local stack top n hashes nil local function set s if top then n n 1 if n gt 9 then report_macros number of arguments gt 9 ignoring Xs s else local ns stack local h hashes ns if not h then h rep ns hash
141. programming language In practice coding a document in each of them triggers similar sentiments with regards to coding as TEX itself does So just for fun I added a couple of commands to ConTEXt MIV that permit coding a document in Lua In retrospect it has been surprisingly easy to implement a feature like this using metatables Of course it s a bit slower than using TEX as input language but sometimes the Lua interface is more readable given the problem at hand After a while I decided to use that interface in non critical core ConTEXt code and in styles modules and solutions for projects Using the Lua approach is sometimes more convenient especially if the code mostly manipulates data For instance if you process xml files of database output you can use the interface that is available at the TEX end or you can use Lua code to do the work or you can use a combination So from now on in ConTEXt you can code your style and document source in a mixture of TEX xml MetaPost and in Lua In this article I will introduce typesetting in Lua but as we rely on ConTEXt it is unavoidable that some regular ConTEXt code shows up The fact that you can ignore backslashes does not mean that you can do without knowledge of the underlying system I assume the user is somewhat familiar with this macro package Some basics To start with I assume that you have either the so called ConTEXt minimals installed or TEXLive You only need LuaTEX and can fo
142. pter gt lt document gt Fonts and encoding In the previous subsection we have seen that with simple macros we can have a valid i e validated by Acrobat 9 0 PDF A 1a PDF document We still didn t talk about fonts The default fonts used by ConTEXt MkIV are the OpenType version of LatinModern and as ofnow they cannot be embedded into PDF A documents because OpenType isn t supported in version 1 4 this is not a problem because in essence ConTEXt MkIV strips the OpenType part and embeds a valid Type1 or TrueType font Given an OpenType font ConTEXt MkIV is also able to map each glyph to its Unicode id so even this side is not problematic Unfortunately it s already known that typesetting mathematics with the Computer Modern and Latin 36 MAPS 41 Modern fonts easily leads to invalid PDF A documents due to misleading dimensional information of some fonts As widely noted by C Beccari just the simple a not b invalidates the whole document due the wrong dimension of the not sign it has Bounding Box 139 139 960 775 hence a width equal to zero What are the solutions There are two of them both unsatisfactory 1 choose another valid math family 2 make a high resolution more than 300dpi bitmap of each invalid formula Of course it s possible to edit the fonts but it s not a general solution there are limitations due to copyright and we should embed a modified copy of the font that differs from the original ve
143. r i 0 n do context metafun start context metafun template n i context metafun stop if i lt n then context quad end end end context hbox function steps 8 end WE YEO EO OCO To some extent we fool ourselves with this kind of Luafication of MetaPost code Of course we can make a nice MetaPost library and put the code in a macro instead In that sense doing this in ConTEXt directly often gives better and more efficient code Of course you can use all relevant commands in the Lua interface like context startMPpage context draw origin for i 0 100 10 do context down d 0 i end context withcolor MPcolor darkred context stopMPpage to get a graphic that has its own page Don t use the metafun namespace here as it will not work here This drawing looks like vAn Hans Hagen NAJAAR 2010 67 68 MAPS 41 Jean Michel Hufflen Processing Computed Texts Abstract This article is a comparison of methods that may be used to derive texts to be typeset by a word processor By derive we mean that such texts are extracted from a larger structure which can be viewed as a database The present standard for such a structure uses an XML like format and we give an overview of the available tools for this derivation task Keywords Typesetting computed texts TEX LaTEX Con TEXt XFTEX Lua TEX XML XSLT char
144. r to 33 this modus operandi may be viewed as a worthwhile exercise but is unusable in practice especially when it is not trivial to obtain sort keys from items to be sorted 3 eXtensible Markup Language Readers interested in a gen eral introductory book to this formalism can refer to 32 4 The XML format used by Microsoft Excel is OOXML Office Open XML 5 All the source texts mentioned throughout 19 and this article including new versions realised for this present arti cle in which case the corresponding file names are suffixed with plus can be downloaded in extenso from the Web page http lifc univ fcomte fr home jmhufflen texts guit 2009 6 If you are interested in the story of Doc Savage series and its successive editions you can find more information in 43 7 When several titles have been used such a story is more commonly known under the pocket book s title because pocket books are easier to get than pulps which are very rare That is why our title elements always refer to pocket books the contents of pocket book elements being always empty 8 Schemas allow specifiers to define document types which can be viewed as some taxonomy common to a family of XML texts There exist several schema languages and the Web page abovementioned gives several versions using a DTD Document Type Definition 32 Ch 5 XML Schema 42 Relax NG New Generation 5 and Schematron 22 A discussed comparison
145. rget about installing pdf IEX or XIEX which saves you some megabytes and hassle Now from the user s perspective a ConTEXt run goes like context yourfile and by default a file with suffix tex will be processed There are however a few other options context yourfile xml context yourfile rlx forcexml context yourfile lua context yourfile pqr forcelua context yourfile cld context yourfile xyz forcecld When processing a Lua file the given file is loaded and just processed This option will seldom be used as it is way more efficient to let mtxrun process that file However the last two variants are what we will discuss here The suffix cld is a shortcut for ConTEXt Lua Document 50 MAPS 41 Hans Hagen A simple cld file looks like this context starttext context chapter Hello There context stoptext So yes you need to know the ConTEXt commands in order to use this mechanism In spite of what you might expect the codebase involved in this interface is not that large If you know ConTpxt and if you know how to call commands you basically can use this Lua method The examples that I will give are either sort of standalone that is they are dealt with from Lua or they are run within this document Therefore you will see two patterns If you want to make your own documentation then you can use this vari ant startbuffer context See this stopbuffer typebuffer ctxluabuffer I use anonymous buffe
146. rks for that purpose or when a more robust mechanism was needed I used writes at the price of another TEX run and auxil iary file analysis And here is another advantage of using latelua since Lua chunks are executed during shipout we don t need to worry about the page break because it has already happened If every graphic state setup is a Lua statement performed in order during shipout and every such statement keeps the output pdf state in sync through pdf print calls then after the shipout the graphic state is exactly what should be passed on to the next page In a well structured pdf document every page should refer only to those resources which were actually used on that page The pdf IEX engine guarantees that for fonts and images the latelua mechanism makes it straightforward for other resource types Note a little drawback of that late graphic state concept before shipout one can only access the state at the beginning of the page because recent latelua calls that should update the current state have not happened yet I thought this might be a problem and made a mechanism that updates a pending graphic state for early usage but so far I never needed to use it in practice PDF data structures When digging deeper we have to face creating custom pdfobjects for various purposes Due to the lack ofcom posite data structures in pdf IEX one was condemned to strings Here is an example of pdf object creation in pd
147. rn node new KERN 1 item_line width Paul Isambert node insert_after head end_node item_kern node insert_after head item_kern item_line item end_node next else item item next end end end We could use different values of the attribute to distin guish different underlining styles To do so we would still use node has attribute since it returns the value of the attribute or nil if the attribute isn t set That s another exercise left to the reader Marginal notes When a document has comfortable margins and notes are infrequent and short marginal notes are an elegant and convenient alternative to footnotes They are best typeset with their first line level with the line in the text to which they refer However such a rule cannot be absolute Suppose for instance that a note is called on the last line of a page and itself is made of more than one line If we follow the rule then the note will invade the bottom margin and ruin the design of the page So it should be shifted up so that its last line is level with the last line of the page Doing this is also an improvement when the text doesn t fill the page e g at the end of a chapter even though there might remain space on the page to accommodate the note The page looks better that way a note is a note and would be too conspicuous if it were allowed to run without the main text by its side Ideally a note should also be shifted up if it runs along a sec
148. rs here but you can also use named ones The other variant is startluacode context See this stopluacode This will process the code directly Of course we could have encoded this document completely in Lua but that is not much fun for a manual The main command There are a few rules that you need to be aware of First of all no syntax checking is done Second you need to know what the given commands expects in terms of arguments Third the type of your arguments matters nothing just the command no arguments string an argument with curly braces array alist between square backets sometimes optional hash an assignment list between square brackets boolean when true a newline is inserted when false omit braces for the next argument In the code above you have seen examples of this but here are some more context chapter Some title context chapter first Some title context startchapter title Some title label first This blob of code is equivalent to chapter Some title chapter first Some title startchapter title Some title label first Typesetting in Lua using Lua TEX NAJAAR 2010 51 You can simplify the third line of the Lua code to context startchapter title Some title label first In case you wonder what the distinction is between square brackets and curly braces the first category of arguments concerns settings or lists of options or names of i
149. rsion an error prone situ ation because modifications of PDF A 1a document are permitted and an editor can use the system fonts The problem remains even if ConTEXt MkIV can patch the font on the fly A way out is the complete embedding of the patched fonts so that the editor uses the document fonts but it s not a robust solution some editors can still use the original system fonts Conclusion The PDF A 1a is a good standard for document archiv ing it s a complete Page Description Language it relies on Unicode which is also a good Character Language and on Typel and TrueType as digital typography for mal language it has also a good Document Markup Language The binary electronic format and the digital signature for detection and prevention of document modifications complete the picture The restrictions e g profiles for colors together with a freely available PDF A 1a PDF reader lead to a concrete self containment format PDF A 1a support in ConTEXt MkIV is still experi mental it needs more tests but programming in luaTEX is simpler than in pdf IEX and the 1 4 is a well known PDF version The color management can probably be improved by permitting to specify a color and its profile for a specific object and not for the whole document as Luigi Scarso it currently is On the other hand the model of PDF A 1 is the traditional paper Omitting animations and 3D pictures is questionable and perhaps also scripting lan
150. rtchapter title Test startparagraph Nexternalfigure rgb noprofile jpg width 0 4 textwidth stopchapter stoptext The luatex program loads the image it wraps it in a XObject and sets its ColorSpace to DeviceRGB lt lt Type XObject Subtype Image Width 640 Height 400 BitsPerComponent 8 NAJAAR 2010 33 Length 13238 ColorSpace DeviceRGB Filter DCTDecode gt gt stream endstream This is a valid PDF A 1a document but if we delete the default_rgb icc profile profile default_cmyk icc default_gray icc then the resulting PDF is an invalid PDF A We should not be surprised there is color space which is device dependent and hence we cannot guarantee the correct reproduction of the colors In the next example we use a rgb image with a valid color profile setupbackend format pdf a 1a 2005 level 0 rofile default_cmyk icc default_gray icc setupstructure state start starttext startchapter title Test startparagraph Nexternalfigure rgb icc srgb jpg width 0 AN textwidth stopchapter stoptext For the same reason seen before this PDF is still an invalid PDF A the image is again wrapped in a XObject with a DeviceRGB color space but this time it s not correct the image has its own profile and hence its colors are device independent If we add a rgb profile we have again a valid PDF A prof ile default cmyk icc default rgb icc default gray icc
151. s are difficult to integrate into a generative typesetting workflow which targets many output formats Problematics Within Generative Typesetting Generative typesetting itself emerges from a very spe cific set of problematics A primary concern is a re duction in syntax complexity This is solved by the introduction of a pre format that provides sight level semantics for specifying desired outcomes in the output formats For example the Markdown pre format was designed such that a Markdown formatted document should be publishable as is as plain text without look ing like it s been marked up with tags or formatting instructions To demonstrate while a top level header in Mark down reads as My Header Once converted into HTML the above turns into lt h1 gt My Header lt h1 gt Sight level semantics rely on visually distinct identi fiers This stands in sharp contrast to both HTML XML and TEX which rely on distinct tags combined with reserved characters In short this approach to se mantic formatting relies on utilizing more reserved characters than these other systems Which charac ters are chosen and the nature of their organization is an attempt to strike a balance between both read ability and processibility Like WYSIWYG sight level semantics represent a redistribution of agency be tween the human and the machine Unlike WYSIWYG the utilization of Markdown implies an intention for translating it into other formats
152. s different for each of the two types as explained below TLMGR directives A list of TLMGR directives like e g addMap or add Format A better interface is planned but for the moment you have to make sure you know what you are doing Have a look at the existing TEX Live package database texlive tlpdb for examples You only have to specify the directives do not add execute at the start TL dependencies Package Id s of other TEX Live packages on which this package depends one per line Unless you know exactly what is needed it is probably best to leave this field blank but in any case tlcontrib metatex org You only have to specify the package Id s do not add depend at the start If your package depends on a executable package for example luatex write the Id as luatex ARCH Doing so will make tlmgr auto matically select the appropriate executable package for the user s platform TL postactions A list of TLMGR post install actions like e g shortcut or fileassoc A better interface is also planned but for the moment you have to make sure you know what you are doing here as well Have a look at the existing TEX Live package data base texlive tlpdb for examples You only have to specify the actions do not add postaction at the start License Pick one from the two drop downs and set the ra dio button accordingly If you need to use Other free license or Other non free license please drop me an email I am sur
153. s xsd http www w3 org 2001 XMLSchema xmlns xsl http www w3 org 1999 XSL Transform extension element prefixes xsd gt lt xsl output method text encoding IS0 8859 1 use character maps some special characters gt lt xsl strip space elements gt lt xsl character map name some special characters gt lt xsl output character character string gt lt xsl output character character 4 string gt lt xsl output character character string gt lt xsl output character character amp amp string amp gt lt amp Plain TFX s commands gt lt xsl output character character string Nbackslash Nf and NY are only gt lt xsl output character character string gt lt usable in math mode gt lt xsl output character character string gt lt cf 27 Exercise 16 12 gt lt xsl output character character string Nchar 7E lt Using hexadecimal code gt lt xsl output character character amp start command string gt lt xsl output character character amp start group string gt lt xsl output character character amp end group string gt lt xsl character map gt lt xsl variable name eol select amp xA as xsd string End Of Line character gt lt xsl template match story list as xsd string gt lt xsl variable name pulps as xsd string lt xsl appl
154. seperate configuration file This file explains what should literally appear in the output file for any given AST element One immediately obvious benefit of this approach is the capacity to internationalize the pre format with ease For standard Markdown Subtext would de fine the effect of American quotation marks x as quotation x The interface file could be quickly mod ified to intepret double angle quotation marks x in the same way Vquotation x The effects configuration can also incorporate setup requirements If a generative typesetting workflow involved dealing with documents of either English or French then it would be known that when double angle quotation marks are used in the pre format that the resulting document should have French style punctuation and spacing The Subtext interpreter would then add Nmainlanguage french setcharacterspacing frenchpunctuation to the pre amble of a ConTEXt document Likewise specific character spacing settings could be added to the CSS of an HTML or ePub output file The mutability of this system is its primary charac teristics Specific text elements need not fit a pre exist ing notion as new rules can be invented and interpreted within configuration files This capacity to unlock the translation layer into an instrinsically customizable tool not only guarantees future proofing it also allows for highly specific workflows to be developed as the inter
155. shipout starts the list is almost empty It contains just a late_lua whatsit node The code of this whatsit creates a Lua coroutine that repeatedly sets some color some transformation and generates some text an exclamation mark using an already known method The tail of the text is another late_lua node After inserting the newly created list fragment the thread function yields effectively finishing the exe cution of the first late_lua chunk Then the shipout procedure swallows the recently generated portion of text writes it out and takes care of font embedding After the glyph list the shipout spots the late_lua whatsit with the Lua code that resumes the thread and performs another loop iteration creating a graphic setup and generating text again So the execution of the coroutine starts in one whatsit but ends in another that didn t exist when the procedure started Every list item is created just before being processed by the shipout Reinventing the wheel Have you ever tried to draw a circle or ellipse us ing pdfliterals It is very inconvenient because the pdf format provides no programming facilities and painting operations are rather limited in comparison with its PostScript ancestors Here is an example of some PostScript code and its output The code uses control structures which are not available in pdf It also 30 MAPS 41 takes advantage of the arc operator that approximates arcs with B zier curves To obtain
156. string and a command s beginning a solution is to use a character belonging to a private area of Unicode 34 for the latter For sake of readabiblity we define this fictive character by means of an entity 5 start command 32 p 48 49 Introducing this entity leads us to put a dummy DOCTYPE tag since XSLT stylesheets do not refer to a DTD In other words specifying these addi tional characters is a trick but that allows us to process strings extracted from the original XML file systemat ically As shown in Fig 4 the same technique can be used for opening and closing a group we use fictive characters the character map transforms into braces The same for a delimited fragment in IpX s math mode Another solution could be the direct generation of Unicode texts and the use of a Unicode compliant TEX like engine e g X IFX 26 or LuaTEX 9 As abovementioned XSLT is not limited to texts gen eration the xsl output element s method attribute may also be set to html or xhtm1 41 8 20 in which case it allows Web pages to be generated Likewise this method attribute set to xml means that XML texts are to be generated Using these output methods pro vides a great advantage since any XSLT stylesheet is an XML text an XSLT processor checks that the final docu ment is well formed in particular opening and closing tags must be balanced The generation of JA TpX texts lacks an analogous check an XSLT pro
157. t PostScript support sounds scary Obviously I m not aiming to develop a fully featured PostScript machine on the LuaTEX platform The PostScript interpreter is supposed to render the page on the output In Luna I just write the vector data into the pdf document content so what I actually need is a reasonable subset of PostScript operators The aim is to control my doc ument graphics with a mature language dedicated to that purpose The following two setups are equivalent as at the core level they both operate on the same Lua representation of a graphic state pdfstate lua interface save fillcolor color cmyk 40 100 0 restore pdfstate postscript interface ps gsave 4 1 Q setcmykcolor ps grestore A very nice example of the benefit of joining typeset ting beyond the page builder and PostScript language support is the 7r spiral submitted by Kees van der Laan see www gust org pl projects pearls 2010p Pawet Jackowski GUST Luigi Scarso NAJAAR 2010 31 PDF A 1a in ConTEXt MkIV Abstract l present some considerations on electronic document archiving and how ConTEXt MkIV supports the ISO Standard 19500 1 Level A Conformance PDF A 1a 2005 an ISO standard for long term document archiving Keywords LuaTeX ConTeXt MkIV PDF A color font Introduction In this paper I will briefly talk about the ISO Standard PDF A 1 and how ConTEXt MkIV tries to adhere to its requirements by s
158. t forms on the website But I hope that even in the current state it will be a useful addition to the whole TEX Live experience Notes 1 The website for TLContrib is http tlcontrib metatex org 2 The mailman page for the mailing list is http www ntg nl cgi bin mailman listinfo tlcontrib 3 See http www tug org tds tds html for a detailed descrip tion of the current TEX Directory Structure specification Taco Hoekwater tlcontrib metatex org Piet van Oostrum Nieuws van CTAN NAJAAR 2010 9 Een uittreksel uit de recente bijdragen in het CTAN archief Abstract Dit artikel beschrijft een aantal recente bijdragen uit het CTAN archief en andere bronnen op het Internet De selectie is gebaseerd op wat ik zelf interessant vind en wat ik denk dat voor veel anderen interessant is Het is dus een persoonlijke keuze Het heeft niet de bedoeling om een volledig overzicht te geven Keywords TEX LaTEX packages CTAN bibliografie biber biblatex Inleiding In juli 2010 is een nieuwe TEXLive 2010 distributie uit gekomen Ik zit momenteel in Bolivia waar ik geen TEXLive DVD s krijg Ik heb hem in de vorm van een MacTpx installer voor mijn MacBook gedownload over een 256kbps internetverbinding Als ik me goed herin ner deed hij er meer dan 24 uur over Gelukkig is de download herstartbaar waarbij hij verder gaat op het punt waar hij gebleven is anders zou het niet gelukt zijn De TEXLive installaties hebben tegenwo
159. t command needs to be flushed explicitly so in the case of context nested test test 9 a string is created but nothing ends up at the TEX end Flushing is up to you Beware nested only works with the regular ConTEXt catcode regime Trial typesetting Some typesetting mechanisms demand a preroll For instance when determining the most optimal way to analyse and therefore typeset a table it is necessary to NAJAAR 2010 57 58 MAPS 41 Hans Hagen typeset the content of cells first Inside ConTEXt there is a state tagged trial type setting which signals other mechanisms that for instance counters should not be incremented more than once Normally you don t need to worry about these issues but when writing the code that implements the Lua interface to ConTEXt it definitely had to be taken into account as we either or not can free cached nested functions You can influence this caching to some extend If you say function context whatever end the function will be removed from the cache when ConTEXt is not in the trial type setting state You can prevent any removal of a function by returning true as in function context whatever return true end Whenever you run into a situation that you don t get the outcome that you expect you can consider returning true However keep in mind that it will take more mem ory something that only matters on big runs You can force flushing the whole cache
160. t mo dule Het pdf bestand voor de drukker wordt aangemaakt met behulp van pdftex 1 40 9 en luatex 0 64 0 draaiend onder Linux 2 6 De gebruikte fonts zijn Linux Libertine het niet proportionele font Inconsolata schreefloze fonts uit de Latin Modern collectie en de Euler wiskunde fonts alle vrij beschikbaar TEX is een door professor Donald E Knuth ontwikkelde opmaaktaal voor het letterzetten van documenten een documentopmaaksysteem Met TEX is het mogelijk om kwalitatief hoogstaand drukwerk te vervaardigen Het is eveneens zeer geschikt voor formules in mathematische teksten Er is een aantal op TFX gebaseerde producten waarmee ook de logische structuur van een document beschreven kan worden met behoud van de letterzet mogelijkheden van TEX Voorbeelden zijn BIFX van Leslie Lamport AMS TEX van Michael Spivak en ConIfXt van Hans Hagen Inhoudsopgave Redactioneel Taco Hoekwater 1 Announcement EuroTEX conference 2011 Taco Hoekwater 2 tlcontrib metatex org Taco Hoekwater 3 Nieuws van CTAN Piet van Oostrum 9 Up to ConTEXt MkVI Hans Hagen 14 LuaTEX 0 60 Taco Hoekwater 19 Luna my side of the moon Pawel Jackowski 25 PDF A 1a in ConTEXt MIV Luigi Scarso 31 Three things you can do with LuaTEX that would be extremely painful otherwise Paul Isambert 37 Toward subtext John Haltiwanger 45 Typesetting in Lua using LuaTEX Hans Hagen 49 Processing Computed Texts Jean Michel Hufflen 68 la Mondrian
161. t some text and then reset the attribute the text will have the value attached to it for the rest of TEX s processing This leads to the first definition def underline 1 quitvmode attribute100 1 1 attribute100 7FFFFFFF NAJAAR 2010 39 directlua callback register post linebreak filter get_lines It s important to use qui tvmode so that the indentation box is inserted before the attribute is set and not be underlined in case the underlined text is the beginning of a paragraph An attribute is set if it has any value but 7FFFFFFF So setting it to 1 here would be the same thing as setting it to 45 see the end of this section for an example of use for different values Now all nodes produced by the argument to underline have the value 1 for attribute 100 which was arbitrarily chosen Attribute 458 would have been equally good Actually one should use attributes with greater care i e they should be allocated with macros like newcount so that one never uses the same attribute for different tasks The last action performed by underline is to regis ter a function in the post linebreak filter callback It does so because the Lua function used to underline clears the callback as we ll see so that it is called only on those paragraphs where it is required It could be called on all paragraphs but it d waste TEX s time Let s now turn to the Lua functions get lines function head for li
162. t title gt The Lost Oasis lt title gt lt pulp nb 7 gt lt pocket book nb 6 gt lt story gt story lt title gt The Man of Bronze lt title gt pulp nb 1 gt pocket book nb 1 gt story story lt title gt The Red Spider lt title gt pocket book nb 95 gt story story lt title gt World amp apos s Fair Goblin lt title gt lt pulp nb 74 gt lt pocket book nb 39 gt lt story gt lt story list gt Figure 1 Master file using XML like syntax the pocket book s Fig 2 gives the schema modelling our taxonomy written using XML Schema 42 Let us recall that this language provides a datatype library for example xsd string for strings the prefix xs1 allows us to get access to XML Schema s constructs Now we propose to search the information given in Fig 1 extract the items published as pulps sort them according to the publication order The title given is the pulp s if the corresponding pocket book has been retitled a footnote must give the new title Of course we wish the result to be typeset nicely as LaTEX or ConTEXt is able to do To be more precise a good solution processable by Plain TEX could look like the source text given in Fig 3 As mentioned above a TEX based solution story list story title pulp 3 s k could use TEX commands for dealing with the elements story list story title pulp
163. tag names are lt document gt lt chapter gt and lt p gt as we see in fig 1 from Acrobat 9 0 but we still need to put the appropriate typographic elements into the PDF In the context of PDF A a validation program ex pected the tags as defined by Adobe and this leads to some syntactic sugar macros i e instead of PDF A la in ConTEXt MkIV DA Tags AQ document 9 lt chapter gt opes E g lt p gt S The Earth as a habitat for animal life is in old Figure 1 The tags structure of a simple document startelement chapter stopelement it s better to use startchapter title Test stopchapter which puts the correct tags and also typesets the chap ter title Test as expected a kes Tags EQ document E J lt section gt chapter AQ lt sectionnumber gt 1 g lt sectiontitle gt S Test rd lt sectioncontent gt E paragraph u m Bf We thrive in information thick worldsbecauseof A image S XObject Image w 640 h 400 E lt table gt AG lt tablerow gt E tablecell fy 1PathPathPathPath AG lt tablecell gt 2PathPathPathPath g lt tablerow gt lt tablecell gt 3PathPathPathPath Figure 2 The tag structure of complex document The complete list of tags can be found in strc tag mkiv and of course ConTEXt MkIV permits to redefine the default mapping In fig 2 our document shows that ConTEXt MkIV had already mapped some prede
164. tarted drawing la nature Meisje 1890 Winterswijk 1895 Jan Toorop has influenced Mondriaan by his new realism Mondriaan was often a guest at Toorop s in Zeeland in the beginning of the 20 century the light at the seashore inspired Mondriaan i Zeeland farmer 1909 la Mondrian Mondriaan exercised an oval as a boundary not as a frame The Composition in Oval 1913 reminds me of the work of George Braque 19 Composition in Oval 1913 Composition in Oval 1914 He has lived in Paris 1919 1938 and was influenced by cubism and pointillism ae sage x A eel Beach with one Pier 1909 fs A 5 SS oe Blossoming Apple Tree 1912 I was familiar with some of Mondriaan s works from the De Stijl period where he exercised the use of primary color panes and straight lines which reminds me of stained glass windows emulation Large Composition with Red Blue and Yellow 1928 NAJAAR 2010 81 82 MAPS 41 Kees van der Laan His series of Lozenge s from the twenties ended in a minimal one given below at Ge Lozenge with 3 lines 1925 Lozenge with 2 lines 1931 I measured his Lozenges and was suprised that he missed the divison of the sides by the golden ratio his sides are divided in 3 9 5 6 the golden ratio does not hold ie 3 9 5 6 5 6 9 5 A tiny difference but nonetheless mean P emulation P emulation Mondriaan like Lozenge with 3 lines Fall 2009 kisal xs4all nl b
165. tead with proper settings mostly a reduced hsize To allow newbox to appear inside a macro definition in plain TEX we suppress the outer error beforehand then we set the note in its box with a uniquely defined name thanks to newcount NAJAAR 2010 41 and most importantly we set an attribute to the value of the box register and vadjust a literal with that attribute This literal s only role is to mark the line it comes from so we ll be able to spot lines with margin notes when needed along with the box s number the value of the attribute The following Lua function to be inserted in the post_linebreak_filter callback does exactly that our special pdfliterals give their attributes to the lines they come from and are removed Now the reader might have wondered why we used the pre version of vadjust instead of the default it s because of a bug in the actual version of LuaTEX to be fixed in v0 64 I am told some prev fields are sometimes wrong as would be the case here and we couldn t link each literal to its line if the latter was before the former So we use next instead Note that we can t just take for granted that the first next node is the line first because pre vadjusted material is inserted before the baselineskip glue and because there might be more adjusted material between the literal and the line So we recurse over next fields until we find a line i e a node id HLIST mark_lines function head
166. ter before line 1line 2line 3 after This does not work out well as again there are no lines seen at the TEX end Newline tokens are injected by passing true to the context command context before context startlines context line 1 context true context line 2 context true context line 3 context true context stoplines context after before line 1 line 2 line 3 after Don t confuse this with context before context par context line 1 context par context line 2 context par context line 3 context par context after context par before line 1 line 2 line 3 after Typesetting in Lua using Lua TEX There we use the regular Npar command to finish the current paragraph and nor mally you will use that method In that case when set whitespace will be added between paragraphs Direct output The ConTEXt user interface is rather consistent and the use of special input syntaxes is discouraged Therefore the Lua interface using tables and strings works quite well However imagine that you need to support some weird macro or a primitive that does not expect its argument between curly braces or brackets The way out is to precede an argument by another one with the value false We call this the direct interface This is demonstrated in the following example unexpanded def bla 1 1 startluacode context bla false xxx context par context
167. text doifmodeelse screen function 77 mode screen end function 77 mode screen end However often a mode does not change during a run and then we can use the following method if tex modes screen then else end Watch how the modes table lives in the tex namespace We also have systemmodes At the TEX end these are mode names preceded by a x so the following code is similar if tex modes mymode then this is the same elseif tex systemmodes mymode then test as this else but not this end NAJAAR 2010 59 60 MAPS 41 Hans Hagen Inside ConTEXt we also have so called constants and again these can be consulted at the Lua end if tex constants someconstant then else end But you will hardly need these and as they are often not public their meaning can change unless of course they are documented as public Token lists There is normally no need to mess around with nodes and tokens at the Lua end yourself However if you do then you might want to flush them as well Say that at the TEX end we have said toks Don t get inframed framed Then at the Lua end you can say context tex toks 0 and get Don t get framed In fact token registers are exposed as strings so here register zero has type string and is treated as such context lt s gt tex toks 0 This gives lt Don t get framed gt But beware if
168. the same id It s a numeric value and for whatsits which are numerous one should use node subtype like node id Symbolic names won t change they are listed in the LuaTgxX reference manual in the chapter called Nodes available from the LuaTEX web site they re also listed in the tables returned by node types and node whatsits It s simpler to define variables be forehand rather than call node id and node subtype each time we need them That s what we ll do here the following declarations should start any file containing our code it can also be made global by removing the local prefix and thus used anywhere once declared but local variables are faster and safer I use uppercase to mark their status local HLIST local RULE node id hlist node id rule 1 First published in TUGboat 31 3 2010 pp 184 190 2 Author s note I m not a member of the LuaTEX team and this paper has no kind of official authority it s just the result of experimentation by a LuaTEX user Any error or misconception is mine 38 MAPS 41 local GLUE node id glue local KERN node id kern local WHAT node id whatsit local COL node subtype pdf_colorstack The color of a page Typographers speak of a page s color While the color itself depends on several factors its evenness depends on how lines are justified loose lines make the page uneven in color because large interword space creates holes in the
169. the dollar tokens trigger inline math mode If you think that this is annoying you can do the following context pushcatcodes text context x 1 context popcatcodes Now we get x 1 There are several catcode regimes of which only a few make sense in the perspective of the cld interface ctx ctxcatcodes context the normal ConTEXt catcode regime prt prtcatcodes protect the ConTEXt protected regime used for modules tex texcatcodes plain the traditional plain TEX regime txt txtcatcodes text the ConTEXt regime but with less special characters vrb vrbcatcodes verbatim a regime specially meant for verbatim xml xmlcatcodes a regime specially meant for xml processing In the second case you can still get math context pushcatcodes text context mathematics x 1 context popcatcodes When entering a lot of math you can also consider this context startimath context x context context 1 context stopimath Module writers of course can use unprotect and protect as they do at the TEX end As we ve seen a function call to context acts like a print as in context test context bold me context first test me first Typesetting in Lua using Lua TEX NAJAAR 2010 When more than one argument is given the first argument is considered a format conforming the string format function context startimath context s 0 5f utf char x 3CQ math pi context stopi
170. through the spaced chambers of the bitter night alas the solitary city she that was full of people thus a dis tant and hollow epiodion laced with sibilants bewailing the solitary city And now the flickering of a light a pallor emerging from the darkness as though lit by a candle a candle guttering in the cold wind a forgotten candle hid and found again casting its doubtful luster on this faint white plane now visible now lost again in the tenebrous absences behind the eye And still the hushing plaint undeterred by light plying its fricatives like a persistent woeful wind the echo of woe affanato pi angevole a piangevole wind rising in the flut tering night through its perfect primes lament l ing the beautiful princess become an unclean widow an emergence from C a titular C ten tative and parenthetical the widow then weep ll ing sore in the night the candle searching the pale expanse for form for the suggestion of form a balm for the anxious eye weeping she weepeth In the darkness softly A whisper be coming a tone the echo of a tone Doleful incipient lament blowing in the night like a wind like the echo of a wind a plainsong waft ing silently through the windy chambers of the night wafting unisonously through the spaced chambers of the bitter night alas the solitary city she that was full of people thus a dis tant and hollow epiodion laced with sibilants bewailing the solitary city
171. tion break but I ll ignore that case to keep things simpler For an alternative approach in IATEX see Stephen Hicks article in TUGboat 30 2 Generally marginal notes are typeset in a smaller font size and on a smaller leading than the main text Since the leading is smaller some lines of the notes won t be level with the textblock s lines however there should be some cyclical synchronicity between the two blocks so that for instance three lines of the main text have the same height as four lines of the note in TEX terms it would mean for instance baselineskip at 12pt and 9pt respectively and the following lines are level again Here however I will typeset notes with the same leading as the main text to avoid complications Extra calculations are required to achieve what s been previ ously described nothing very complicated though I ll simply use italics to distinguish the notes from the main text Three things you can do with LuaTEX Margin notes so numerous that they sometimes overlap each other and must be shifted upward should probably be converted to footnotes all the more as they ll require a number or symbol so the reader can spot where in the main text they refer to whereas sparse notes don t need such a mark since they re supposed to start on the same line as the text they comment with the known exception we re investigat ing here However we can use the code below to shift notes whatever the re
172. tnessed by the overpainting of various squares in his Victory Boo gie Woogie Mondriaan s random work Composition in Line 1916 is emulated and varied in MetaPost and PostScript in color with the lines position and size randomly chosen He was the first painter to frame work by Lozenges Division of the sides of his Lozenge with 2 lines is near to the golden ratio Emulated Lozenges obeying the golden ratio have been included The variations look nevertheless Mondriaan esque Keywords Art color cubism De Stijl golden ratio Mondrian pointillism pseudo random numbers MetaPost PostScript Toorop Introduction My applied math professor Hans Lauwerier published in 1987 long after I fin ished my math education Fractals meetkundige figuren in eindeloze herhaling It contained the following picture which he called a la Mondriaan Lauwerier used this picture to illustrate a very simple algorithm for generating a pseudo random number sequence in BASIC start with a four digit number the seed square it and delete the first and last two numbers and repeat the process of squaring and deleting He randomly positioned place horizontally or vertically the line pieces of random length I ll improve on his picture with the use of a shade of color and variation in line thickness Moreover I ll cadre by different frames MAPS 41 Kees van der Laan Mondriaan Mondriaan was born in 1872 at Amersfoort and s
173. top and the birthday date the seed for the pseudo random number generator at the bottom The most Mondrian like is maybe the Easter Egg RGB 110 9 mai Seed 4042010 Mondrian birthday ddmmyyyy a number as seed for srand three numbers from the closed interval 1 for the rgb color values red green blue number for the kind of frame Square 1 Oval 2 Lozenge 1 or 2 gt generated Mondrian alike 0 begin gsave savety for not changing the graphics state outside form exch def b exch def g exch def r exch def date exch def date srand start random generator with birthday date seed 100 50 translate wired in parameters u 420 def v u 1 618 mul def hu u 2 div def hv v 2 div def 0 u v BB of rectangle la Mondrian NAJAAR 2010 89 maxrandom 500 def maxlength 20 def maxwidth 3 def eps 0 1 def hx u unifrmdev def hy v unifrmdev def 1 maxlength unifrmdev def w maxwidth unif rmdev def spread 2 unifrmdev mul def 0 2 spread 2 unifrmdev 1 add 2 div mul def 5 1 5 spread 2 unifrmdev 3 add 4 div mul def 0 75 1 25 color r eq eps r ifelse spread g eq eps g ifelse spread b eq eps b ifelse spread def form eq contour 0 moveto u lineto u v lineto v lineto closepath def if Square form 1 eq contour hu hv hu hv 360 ellipse def if Oval form 2 eq contour hu Q moveto u hv lineto hu v lineto hv lineto closepath def if L
174. top down Formal markup on the other hand is bottom up The final display of text is defined by discrete instructions to a program that assembles that text in a highly spe cific way TEX is one obvious example of this Like wise PostScript and PDF are formal specifications for typesetting text The immediate drawbacks of formal markups include an often byzantine syntax and a lack of processibility into anything other than the output formats that the formal system knows how to handle To this day copy pasting from a PDF document often leads to awkward extra characters such as linebreaks in the pasted text 46 MAPS 41 The third class of screenic text system is WYSTWYG While WYSIWYG is first and foremost a user interface design pattern and thus can be used to output files in both formal and semantic formats it is also defines the extremely pervasive Microsoft Word file formats By positioning the comfort of the user above all other considerations WYSIWYG finds its strengths in its ease of use and its inherent predictability whatever you se on the screen should appear exactly that way on paper By privileging the human to such an extent however both translatability and the typographic quality of the text suffer Since text is intended to always appear exactly as it was input MS Word can do no calculations for line breaks other than on a per line basis Worst of all WYSTWYG formats especially those derived from Microsoft product
175. tory sym xmlfirst 1 pulp xmldoifelsetext 1 pulp disablemode ds pulp xmlfirst 1 pulp footnote Book s title xmlfirst 1 title xmlfirst 1 title stopxmlsetups startxmlsetups xml ds title xmlflush 1 stopxmlsetups startxmlsetups xml ds pulp doifmodeelse ds pulp xmlatt 1 nb xmlflush 1 stopxmlsetups starttext xmlprocessfile ds ds xm1 stoptext Figure 8 Processing a master file with Con TEXt Mk IV lt nbst text gt 60 The Maji lt nbst text gt is 60 The Maji If this attribute is set to LaTeX the result is N 60 The Maji Acknowledgements I wish to thank Hans Hagen who greatly helped me debug and improve LuaTEX source texts Thanks also to Karl Berry who clarified some terminology notions 76 MAPS 41 Last but not least thanks to Taco Hoekwater for his patience when he was waiting for this final version References 1 2 14 15 16 Apache FOP November 2010 http xmlgraphics apache org fop Fr d ric BOULANGER LaTEX au pays des tableurs Cahiers GUTenberg Vol 39 40 p 7 16 In Actes du Congr s GUTenberg 2001 Metz Mai 2001 Neil BRADLEY The Concise SGML Companion Addison Wesley 1997 David CARLISLE Michel Goossens et Sebastian RAHTZ De XML a PDF avec xmltex XSLT et Passive IEX Cahiers GUTenberg Vol 35 36 p 79 114 In Actes du congr s GUTenberg 2000 Toulouse Mai 2000 James CLARK et a
176. uik van biber in plaats van BibTgX moet de extra optie backend biber meegegeven worden aan het biblatex pakket De voordelen van biber zijn dat het Unicode on dersteunt geen kunstmatige limieten heeft zoals Bib TEX en dat het opgesplitste en meervoudige bibliografie n in n keer kan verwerken Het programma is geschreven door Francois Charette and Philip Kime CTAN biblio biber Piet van Oostrum http www pietvanoostrum com piet vanoostrum org NAJAAR 2010 13 14 MAPS 41 Up to ConTEXt MkVI Introduction No this is not a typo Mk VI is the name of upcoming functionality but with an experimental character It is also a playground Therefore this is not the final story Defining macros When you define macros in TEX you use the to indicate variables So you code can end up with the following def MyTest 1 2 3 4 dontleavehmode dostepwiserecurse 1 2 3 ifnum recurselevel gt 1 space fi recurselevel 4 space par This macro is called with 4 arguments MyTest 3 8 1 Hi However using numbers as variable identifiers might not have your preference It makes perfect sense if you keep in mind that TEX supports delimited argu ments using arbitrary characters But in practice and especially in ConTEXt we use only a few well defined variants This is why you can also imagine def MyTest first last step text dontleavehmode dostepwiserecurse first last step ifnum recurs
177. umenten waarnaar gerefereerd kan worden biblatex philosophy Deze stijl van Ivan Valbusa is voor referenties in het vak gebed filosofie Helaas is de handleiding in het Italiaans met slechts een korte README tekst in het Engels Er zijn 3 stijlen klassiek modern en verbose Citaties zijn door middel van voetnoten De eerste twee stijlen zijn gebaseerd op auteur jaar stijl de voetnoot bevat auteur en jaar Bij verbose worden alle bibliografische gege vens opgenomen in de voetnoot Met de optie backref worden in de bibliografie bij een document terugverwij zingen geplaatst naar de plaatsen in de tekst waar het document geciteerd wordt Het pakket wordt gebruikt door middel van een van de volgende commando s Nusepackage style philosophy classic biblatex usepackage style philosophy modern biblatex usepackage style philosophy verbose biblatex Het bijzondere van dit pakket is dat er voorzieningen zijn om vertalingen van werken of herdrukken tegelijk met het origineel op te nemen in de referenties Er zijn voorzieningen voor Engels en Italiaans waarbij het gemakkelijk is om andere talen toe te voegen biblatex mla Het pakket biblatex mla van James Clawson onder steunt citaties volgens de richtlijnen van de Modern Language Association MLA Het bijzondere van deze stijl is dat alleen auteur en paginanummers gerefereerd worden tenzij er van een auteur meerdere werken ge citeerd worden In dat geval wordt ook d
178. void them As many nested functions can obscure the code rather quickly there is an alternative In the following examples we use test def test 1 1 context test test 1 context test 2a test 3 This gives test 2a test 1 test 3 As you can see the second argument is executed before the encapsulating call to test So we should have packed it into a function but here is an alternative context test test 1 context delayed test 2a test 3 Now we get test 1 test 2a test 3 We can also delay functions themselves look at this context test test 1 context delayed test test 2b test 3 The result is test 1 test 2b test 3 This feature also conveniently permits the use of temporary variables as in local f context delayed test test 2c context before f after Of course you can limit the amount of keystrokes even more by creating a shortcut local delayed context delayed context test test 1 delayed test test 2 test 3 context test test 4 delayed test test 5 test 6 So if you want you can produce rather readable code and readability of code is one of the reasons why Lua was chosen in the first place There is also another mechanism available In the next example the second argument is actually a string local nested context nested context test test 8 nested test test 9 test 10 There is a pitfall here a nested contex
179. y templates select story pulp gt lt xsl sort select xsd integer pulp nb gt lt xsl apply templates gt lt xsl variable gt lt xsl value of select pulps eol amp start command end eol separator xsl template lt Numerical sort gt lt xsl template match story as xsd string gt lt xsl variable name pulp 0 select pulp as element pulp gt lt xsl variable name pulp nb O string select xsd string pulp 0 nb as xsd string gt lt xsl variable name pulp title O select data pulp 0 as xsd string gt lt xsl variable name title processed as xsd string gt lt xsl apply templates select title gt lt xsl variable gt lt xsl value of select amp start command item maps mk group pulp nb 0O string if pulp title 0 then pulp title 0 amp start command footnote maps mk group Bookkapos s title of pulp pulp nb O string title processed else title processed eol separator gt xsl template lt xsl template match title as xsd string xsl apply templates xsl template xsl function name maps mk group as xsd string lt xsl param name string seq as xsd string gt lt xsl sequence select amp start group string seq kend group gt lt xsl function gt lt xsl stylesheet gt Figure 4 Getting a source text for Plain TEX by means of an XSLT stylesheet 72 MAPS 41 fo root x
180. ypeset texts even during shipout The code below results in typing the it is never too late text with a 10bp offset from the page origin lateluna local this luna this local text luna text it is never too late font current 10bp 10bp local next this next this next text text prev if next then text node tail text text next next next prev end this text Note that when mixing shipout time typesetting man ually generated lists and graphic state setups using pdf print calls one has to ensure that the placement of things is in the correct order Once a list of glyphs is inserted after a late_lua whatsit the embedded Lua code should not print literals into the output All literals will effectively be placed before the text anyway Here is a funny mechanism to cope with that lateluna luna thread coroutine create function local this next text tail for i 0 360 10 do graphic setup pdf fillcolor pdf color hsb i 100 100 pdf rotate 10 glyphs list this luna this next text luna text font current 0 this next text text prev this text node tail text luna tail this next NAJAAR 2010 29 tail luna node coroutine resume luna thread text next tail tail prev text if next then tail next next next prev tail end coroutine yield end end coroutine resume luna thread end This is the output Once the page

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NUMMER 41 • NAJAAR 2010