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1. 14 3 3 3 Federated API and NeOn Toolkit Plugins May 2009 15 3 3 4 Distributed System end 2009 222r 15 34 Release Plan 2 s ow Eos mex eG EH ow ORD GES ERA ode d od ER RA SE OE eg 15 17 18 5 1 UserManual 2 222 llle le lel sss s s ass 18 5 1 1 Installation lll llle a 18 5 1 2 Getting started Logging in 2 a 18 CC C rTTT 19 5 1 4 Addinganontologyl 2 2 L 19 Bibliography 28 2006 2009 C Copyright lies with the respective authors and their institutions Page 6 of 29 NeOn Integrated Project EU IST 027595 List of Figures 9 JO eee sees eee eoe see eee chameeeuseesene 10 5 1 This welcome screen is currently displayed when surfing to the Cupboard website 18 5 2 The system accepts an OpenID as login credential 19 5 3 he ontology space contains all ontologies added by the user It also displays additional FOPPPEEPPCPTPSEPEPPEFPIOEPMECPEPEMMMER 19 5 4 Using this form ontologies can be added to the ontology space 20 5 5 Here the user can decide to adapt the namespace of the ontology 20 5 6 Metadata can be entered for the ontology 2 2 ll 21 5 7 For certain metadata entries can be selected from a drop down list 22 Pus Rs ee ogee heen eee a ee ee ES 22 5 9 Using this form the Cupboard system can be queried lll2. Review for xcvFirst in xcv Review by Mathieu DAQUIN Property reviewed usability good xk amp dont trust Review by Mathieu DAQUIN Property reviewed domain coverage good oo o Review by Mathieu DAQUIN Praperty reviewed maturity great oco o dont trust Review by Mathieu DAQUIN Property reviewed correctness OK o dont trust Figure 5 14 The reviews are presented broken down into the 5 properties The most relevant review is displayed first By clicking on I trust or I don t trust trust or distrust statements are stored in the databased and the web of trust is updated D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems C board up Reusability o good xxx teest naar Correctness Bnwer x naar Complexity c o naar Las good x teest Domain Coverage kk kkk Salman Page 27 of Review for xcvFirst in xcv By Mathieu DAQUIN By salman ELAHI By Salman NOOR By salman ELAHI By Salman NOOR By Salman NOOR By Mathieu DAQUIN By salman ELAHI By salman ELAHI Figure 5 15 The reviews are presented broken down into the 5 properties The most relevant review is displayed first based on the general opinion of the users 2006 2009 C Copyright lies with the respective authors and their institutions P
3. RDF C oar Details for http ocalhost 8080 cupboard ontology xcv Family Person view as graph o i Comment x Read Ri Cu p JJ m Coverage oitware i o Comment ony covers a imis 70 statements RDF OWL file Users mda99 Des e In http Aocalhost 8080 cupboard ontology xcv Family o Not reviewed yet Write a Review ISWC DAML 1232030 o Class lt T 370 statements RDF L o http Mocalhost 8080 cupboard ontoloay xcv Family hasChild range Modeling x ak lode dede Beal o http localhost 8080 cupboard ontology xcv Family workWith domain 2 Comment wel described an mod Head Hi o http localhost 8080 cupboard ontology xcv Family Child subClassOf o o http localhost 8080 cupboard ontology xcv Family hasChild domain z O n t Oo oO g y S p a Cc e o http ocalhost 8080 cupboard ontology xcv Family workWith range Figure 2 1 Screenshots of some components of the Cupboard Web interface ontology ranking Figure 2 1 shows different parts of the Web interface of Cupboard in particular displaying an ontology space uploading an ontology inspecting and searching the content of a particular ontology reviewing it etc 2 2 Architecture While the different technologies employed and combined in the system have been described and imple mented before this is the first time that they are combined to expose a broader and more comprehensive set of functionalities to ontology engineers and users alike T
4. s functionality is exposed through servlets which are called by the Cupboard core It can be seen as a RES Tike API THe results are provided as HTML XML or JSON based on content negotiation between the Cupboard core and the TS ORS based on the HTTP request header In practice the TS ORS provides the following functionalities e Storing user reviews e Exposing user reviews in a personalized if user is identifiable order e Calculating overall ratings for ontologies based on their reviews and user specific parameters and trust if user is identifiable e Managing the trust and metatrust information 3 2 Availability At the time of writing this deliverable the Cupboard system is being tested locally by the contributors to its development lt is quickly evolving towards a more stable and robust system A test and demonstration version is made available at the following URL http kmi web06 0pen ac uk 8081 cupboard It is not yet possible in this version to register new users see the release plan Section 3 4 but a test user has been created which can simply be used by entering the following ID in the login screen http kmi web06 0pen ac uk 8081 cupboard login Once logged in the interface automatically redirects to the ontology space owned by this test user http kmi web06 open ac uk 8081 cupboard test where ontologies can be added reviewed inspected searched and annotated with metadata The ontology space of another u
5. and APIs for applications to be able to automatically expose ontologies alignments and metadata to ontologies as well as to find select and exploit such elements from Cupboard In particular one of the essential elements of this API will be based on the Watson API which will be adapted so that developers could search and query specific ontology spaces and build new applications directly exploiting the content of Cupboard s ontologies However this API will have to be extended to integrate functionalities provided by the other components of Cupboard giving the ability to applications to share and exploit alignments reviews and ontology metadata as well In addition as part of this development plan we intend to develop a set of NeOn toolkit plugins relying on the Cupboard federated API The goal here is to realize a direct connection between the environment of the NeOn Toolkit and the infrastructure facilities offered by Cupboard allowing ontology engineers to automatically share and store ontologies developed within the toolkit in Cupboard as well as to import exploit and reuse existing ontologies exposed in Cupboard These plugins will rely on previous work related to the development of the Watson plugin dSMO8 the Oyster plugir 3 and the Alignment plugin DdB 08 integrating them in order to fully exploit all the functionalities attached to Cupboard ontology spaces 3 3 4 Distributed System end 2009 Finally in the current implemen
6. eee 23 5 10 A result set for the query for University 2 ee 23 5 11 A result set for the query for University within the specified ontology 24 5 12 After clicking on the the results are extended to display additional information 24 Ge bee a a 25 5 14 The reviews are presented broken down into the 5 properties The most relevant review is displayed first By clicking on I trust or I don t trust trust or distrust statements are stored in the databased and the web of trustisupdated 26 5 15 The reviews are presented broken down into the 5 properties The most relevant review is displayed first based on the general opinion of the users a a rs 27 D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 7 of 29 Chapter 1 Introduction What is Cupboard In the recent years there has been an ever increasing amount of ontologies indexed by ontology search engines such as Watsor Yet even with so many ontologies now available to reuse the tasks of finding assessing and effectively making use of existing ontologies remain difficult We argue that the main factor inhibiting ontology reuse relates to the lack of support for ontology practitioners to find assess and exploit existing ontologies and incidentally to the lack of support for ontology engineers to effectiv
7. semanticweb org 2004 iswcitUniversity of Karlsruhe El Label Comment null 4 hip annotation semanticweb org 2004 iswcitUniversity of Karlsruhe Label Comment null Ghtp annotation semanticweb org 2004 iswcitUniversity E Ghtup annotation semanticweb org 2004 iswcztUniversity E Ghtp annotation semanticweb org 2004 iswcitUniversity El Label Comment null hup annotation semanticweb org 2004 iswc University E Ghup annotation semanticweb org 2004 iswcitUniversity E Figure 5 12 After clicking on the the results are extended to display additional information D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 25 of 29 cupere Reusability Comment Very limited in relation with coverage Correctness Comment Complexity Comment Domain Coverage x Comment restricted to pizza Modelling Lo d i Comment good but hamper reusability Send Figure 5 13 The user can provide star ratings and explanations for these ratings for each of the five ontolog ical properties what most people think is right see fig 5 15 Note that when you are logged in you can also add trust statements to the reviews and thus change the way the reviews are ranked 2006 2009 C Copyright lies with the respective authors and their institutions Page 26 of 29 NeOn Integrated Project EU IST 027595 cupere
8. was chosen It is important to note that not all the properties have to be reviewed it is also possible to review only one or some properties On the other hand when clicking read reviews on the ontology space the reviews for this ontologies are displayed in a personalized order if logged in see fig 5 14 or based on global trust 2006 2009 C Copyright lies with the respective authors and their institutions Page 22 of 29 NeOn Integrated Project EU IST 027595 C upoare Ontology Metadata Form General Metadata l Ontology Name URI m Descriptian Creation Date H Provenance Metadata El Creator Applicability Metadata El Please select the Ontology type iv Please select the Ontology type Ontology Type Format Metadata El Uppler Level Core Domain Ontology Language Task B Applicatian Ontology Syntax Availability Metadata El Resource Location Figure 5 7 For certain metadata entries can be selected from a drop down list Cu boa rd Details for http localhnasta S8 cupboard antolagy selahi selahiThird RDF Code SPARL Size ofthe fle oke o OMV INumber of statements 411 Search labe Comment Employed OL AL Number of classes BB Number of individualis 100 Not reviewed yet i User Reviews Review with Revyu cam imports imported By Figure 5 8 Here the metadata for an ontology is displayed r er NeOn D1 4 3 Cup
9. 5 5 As a next step metadata information is gathered by the system By default only one form is expanded see fig b 6 but by 2006 2009 C Copyright lies with the respective authors and their institutions Page 20 of 29 NeOn Integrated Project EU IST 027595 board up C Add an ontology to the xcv Ontology Space Ontology name Ontology file Browse or ontology source code Figure 5 4 Using this form ontologies can be added to the ontology space cupere There is no declared default namespace far the xcvSixth ontology In order for this ontology to be properly accessible when published in Cupboard it has to be changed inta set to http localhost 8080 cupboard ontoloqy xcvixcv Sixth Do you agree with this change OK do that Hmm prefer not Nate that ifyau chose natta apply this change the ontology will still be added to your Ontology Space but the entities it contains will nat be dereferenceable Figure 5 5 Here the user can decide to adapt the namespace of the ontology D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 21 of 29 cupe2 Ontology Metadata Form General Metadata El Ontology Name URI Descriptian Creation Date Provenance Metadata H Applicability Metadata l Format Metadata Hl Availability Metadata H Statistics Metadata E submit Figure 5 6 Metadata can be entered fo
10. 8 712 Springer 2004 Davide Guidi Vanessa Lopez Silvio Peroni Enrico Motta Mathieu d Aquin Marta Sabou George Anadiotis Paolo Besana and David Dupplaw OpenKnowledge Question Answering System OpenKnowledge Deliverable D8 4 2008 Jens Hartmann Raul Palma York Sure Maria del Carmen Suarez Figueroa Peter Haase Asun ci n G mez P rez and Rudi Studer Ontology metadata vocabulary and applications In OTM Workshops volume 3762 of LNCS pages 906 915 Springer 2005 Holger Lewen Kaustubh Supekar Natalya F Noy and Mark A Musen Topic Specific Trust and Open Rating Systems An Approach for Ontology Evaluation In Proc of the 4th International Workshop on Evaluation of Ontologies for the Web EON2006 at the 15th International World Wide Web Conference WWW MAY 2006 M Musen N Shah N Noy B Dai M Dorf N Griffith JD Buntrock C Jonquet MJ Montegut and DL Rubin BioPortal Ontologies and Data Resources with the Click of a Mouse In Proc of the Annual Symposium proceedings AMIA Symposium AMIA Symposium page 1223 AMIA Annu Symp Proc 2008 R Palma and P Haase Oyster sharing and re using ontologies in a peer to peer community In Proc of International Semantic Web Conference pages 1059 1062 2005 Silvio Peroni Enrico Motta and Mathieu d Aquin Identifying key concepts in an ontology through the integration of cognitive principles with statistical and topological measures In Proc of the third Asian
11. Open Ratings Systems Page 3 of 29 Work package participants The following partners have taken an active part in the work leading to the elaboration of this document even if they might not have directly contributed to the writing of this document or its parts e OU e INRIA e UPM Change Log Version Date Amended by 07 03 2008 Holger Lewen Skeleton of Deliverable created 07 14 2008 Author added 01 25 2009 Holger Lewen Seeded document with ESWC Demo OAA RE Simi s n EONO Doro 02 12 2009 Mathieu d Aquin Added the development plan chapter with details of the integration of Watson and other things Raul Palma oo 0 5 02 14 2009 Raul Palma Added content about Oyster integration 0 1 0 2 0 3 0 4 0 5 0 7 1 0 02 18 2009 J r me Euzenat Added content about Alignment integra COE dm Sarena 02 19 2009 Holger Lewen Added content about TS ORS integration Ce Mertanen auermai o os 02 20 2009 Mathieu d Aquin 02 23 2009 Holger Lewen Compiled final version for internal review E 03 20 2009 Holger Lewen Addressed comments from the internal review 2006 2009 C Copyright lies with the respective authors and their institutions Page 4 of 29 NeOn Integrated Project EU IST 027595 Executive Summary In this deliverable we present the Cupboard system for ontology publishing sharing and reuse This sys tem is intended to support both ontology engineers and ontology users practitioners For the deve
12. Pariente Lobo E mail address tomas parientelobo atosorigin com Universitat Karlsruhe TH UKARL Institut fur Angewandte Informatik und Formale Beschreibungsverfahren AIFB Englerstrasse 11 D 76128 Karlsruhe Germany Contact person Peter Haase E mail address pha aifb uni karlsruhe de Software AG SAG Uhlandstrasse 12 64297 Darmstadt Germany Contact person Walter Waterfeld E mail address walter waterfeld softwareag com Institut Jozef Stefan JSI Jamova 39 SL 1000 Ljubljana Slovenia Contact person Marko Grobelnik E mail address marko grobelnik ijs si University of Sheffield USFD Dept of Computer Science Regent Court 211 Portobello street S14DP Sheffield United Kingdom Contact person Hamish Cunningham E mail address hamish dcs shef ac uk Consiglio Nazionale delle Ricerche CNR Institute of cognitive sciences and technologies Via S Marino della Battaglia 44 00185 Roma Lazio Italy Contact person Aldo Gangemi E mail address aldo gangemi istc cnr it Food and Agriculture Organization of the United Nations FAO Viale delle Terme di Caracalla 00100 Rome Italy Contact person Marta Iglesias E mail address marta iglesias fao org Laboratorios KIN S A KIN C Ciudad de Granada 123 08018 Barcelona opain Contact person Antonio L pez E mail address alopez kin es D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and
13. Semantic Web Conference ASWC 2008 D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 29 of 29 SAd 07 Marta Sabou Sofia Angeletou Mathieu d Aquin Jesus Barrasa Klaas Dellschaft Aldo Gangemi Jos Lehmann Holger Lewen Diana Maynard Dunja Mladenic Malvina Nissim Wim Peters Valentina Presutti and Boris Villazon D2 2 1 methods for selection and integration of reusable components from formal or informal user specifications NeOn Project Deliverable D2 2 1 The Open University MAY 2007 2006 2009 C Copyright lies with the respective authors and their institutions
14. T lh N NeOn NeOn project org NeOn Lifecycle Support for Networked Ontologies Integrated Project IST 2005 027595 Priority IST 2004 2 4 7 Semantic based knowledge and content systems D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Deliverable Co ordinator Holger Lewen Deliverable Co ordinating Institution Universitat Karlsruhe TH Other Authors Mathieu d Aquin OU Jerome Eurenat INRIA Chan Le Duc INRIA Raul Palma UPM In this deliverable we present the Cupboard system for ontology publishing sharing and reuse This system is intended to support both ontology engineers and ontology users practitioners For the developers of ontologies it offers a complete infrastructure to host their ontologies in online ontology spaces providing mechanisms to describe manage and effectively exploit these ontologies through APIs Furthermore these ontologies are then exposed to the community providing users with a complete friendly environment to find assess and reuse ontologies Document Identifier NEON 2009 D1 4 3 v1 0 February 28 2009 Class Deliverable NEON EU IST 2005 027595 Submission date February 28 2009 Project start date March f 2006 Project duration State Final CE L Distribuon 2006 2009 C Copyright lies with the respective authors and their institutions Page 2 of 29 NeOn Consortium NeOn Int
15. age 28 of 29 NeOn Integrated Project EU IST 027595 Bibliography BED04 DdB 08 dMS 08 dSMO8 Dzb09 Euz04 GLP 08 HPS 05 LSNMO6 MSN 08 PHO5 PMd08 P Buitelaar T Eigner and T Declerck OntoSelect A Dynamic Ontology Library with Support for Ontology Selection In Proc of the Demo Session at the International Semantic Web Conference Hiroshima Japan 2004 Chan Le Duc Mathieu d Aquin Jesus Barrasa J r me David J r me Euzenat Raul Palma Rosario Plaza Marta Sabou and Boris Villaz n Terrazas Matching ontologies for context The neon alignment plug in NeOn Deliverable D3 3 2 2008 M d Aquin E Motta M Sabou S Angeletou L Gridinoc V Lopez and D Guidi Toward a new generation of semantic web applications Intelligent Systems IEEE 23 3 20 28 2008 Mathieu dOAquin Marta Sabou and Enrico Motta Reusing Knowledge from the Semantic Web with the Watson Plugin In Proc of the poster and demo session of the International Semantic Web Conference ISWC 2008 Martin Dzbor Neon toolkit plugin for visualization and navigation in ontologies and ontology networks based on concept summarization and categorization NeOn Deliverable D4 5 4 2009 Jerome Euzenat An API for ontology alignment In Sheila A Mcllraith Dimitris Plexousakis and Frank van Harmelen editors nternational Semantic Web Conference volume 3298 of Lecture Notes in Computer Science pages 69
16. board Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 23 of 29 Enter Search Terms Search Options boa ra rrr ert lt i Csi lt lt lt Sst Search Cupboard D Figure 5 9 Using this form the Cupboard system can be queried C boa rd Details for http annotation semanticweb ara 2004 iswcseLIniversity of Karlsruhe view as graph n httplaocalhast8 S cupbaard ontalaqy xcvxcyFifth individual name University of Karlsruhe name University af Karlsruhe name University of Karlsruhe name University of Karlsruhe o o o O name University of Karlsruhe o o o n http Hocalhost8080 cupboard ontologvixevixevFifth 4 individual name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe coocodQ CE o type htt Jlannotation ee or e004iswerUniversi Individual name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe name University of Karlsruhe oO Oe OO ef type http OF O type htt annotation semanticwehb or 2004 iswe Universi O type http Woruiokati n semanticweb orqi2004 swcitUniversity Figure 5 10 A result set for the query for University 2006 2009 C Copyright lies with the respective authors and th
17. ced search and exploration mechanisms Its role in Cupboard is to index the ontologies that are uploaded in order to provide the same search and exploration mechanisms not for automatically crawled ontologies but for ontologies exposed within ontology spaces As such the integration is realized by deploying a dedicated Watson engine within the Cupboard server comprising both the Watson indexer and the Watson services Concretely this means that Cupboard relies on its own local indexes for uploaded ontologies which are produced accessed and exploited through a local i e on the Cupboard server instantiation of the Watson engine In practice the Watson engine is then used to provide the following functionalities e Retrieving all the ontologies contained in a given ontology space one of the core functionality of Cupboard e Analyzing the content of ontologies to automatically extract elementary metadata e g label comment URI imported ontologies etc which are then passed on to Oyster e Exploring the content of ontologies by providing navigation functions to investigate the relations be tween ontological entities e Searching for semantic content exposed through Cupboard to find ontologies or ontological entities to be reused In addition elements of the Watson web interface are also reused within Cupboard e g the search interface and simply re branded to appear as an homogeneous part of the Cupboard GUI 3 1 3 In
18. component Cupboard allows users to populate their ontology spaces not only with ontologies but also with alignments mappings Using the Alignment Format Euz04 alignments can be uploaded for a given pair of ontology ies The Alignment server then offers to Cupboard the necessary features to support the management evaluation and even production of alignments Uploading an ontology into Cupboard is not only a way to build applications but also a way to share this ontology with the community for reuse It is therefore important to provide efficient ways for users to find as sess and select ontologies in Cupboard s ontology spaces The system naturally inherits the powerful search mechanisms implemented in the Watson engine In addition information for example on the provenance of the ontology or the methodology used to build it are essential for ontology selection Cupboard relies on the Oyster system to provide users with the possibility to enter rich metadata about ontologies in the OMV format HPS 05 and to manage these metadata Finally one of the most important issues hampering reuse concerns the evaluation of ontologies In Cup board we intend to exploit the community feature of the system so that users can provide precise reviews on ontologies reviewing separately different characteristics like reusability complexity coverage etc The TS ORS System LSNMO6 used to handle and manage these reviews implements a mechanism to
19. d tology to th Ontology S a a Cup an ontology to the xcv Ontology Space OS SPARQL fo eoo Cupboard xcv Ontology Space Size ofthe file 30 KB li eR 4 H e gdhttp localhost 8080 cupboard xcv INumbenofstalsmbnts 411 Q Ontolo name lt Representation languages RDF OWL ntology ISWC Research Field QA MOAW ThinkGeek ition Slinky CGEIRC We d IRC Client Semantic Bus y Part One Semantic Bus y Part Two Label z Comment Ontology file choose File iswc owl boa rd Employed DL AL Number of classes 66 aiaia J Cup XCV Ontolc Number of properties 70 4 3 EZ a http localhost 8080 cupb N smberof Individuals 100 CI MOAW ThinkGeek ition Slinky CGHRC P d je Notreviewod yet User Reviews Review with Revyu com b d Imports C oa r Add a review fc Imported By up Reusability z x ISWC Research Field Family eoo Look up for an ontological entity Watson Web Interface m Comment wel structure top level 411 statements 7 RDF OWL 70 statements RDF Ol 4 e 2 http localhost 8080 cupboard search entity look up html q http localhost C Q Not reviewed yet Write a Review X k x k Read Ries gt lt LI MOAW ThinkGeek ition Slinky CGEIRC We d IRC Client Semantic Bus y Part One Semantic Bus y Part Two Correctness amp amp Oo Comment Can t find any bug but SWRC 133 statements RDF OWL IT Ontology b d c Complexity wk Read Reviews 411 statements
20. d v uOSIeM o99JIo u uoJeeg uosjeM Page 10 of 29 Figure 2 2 Cupboard s architecture D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 11 of 29 Chapter 3 Development Plan At the current stage a running prototype of the Cupboard system has been developed which provides the essential functionalities for sharing reviewing and annotating ontologies with rich metadata Testing extend ing and finalizing this prototype are ongoing tasks Below we provide details of the current implementation in particular on the integration of Watson Oyster and the TS ORS We also indicate a concrete schedule for extending this prototype with planned features e g through the integration of the Alignment server and for more robustness as well as the release plan for the system towards an open tool to which any web user could register 3 1 Details of the Current Implementation As explain in Section 2 2 the architecture of Cupboard is centered around a core component to which all the other components are plugged In the current implementation three of the planned components have been at least partly integrated Watson Oyster and the TS ORS system 3 1 1 The Cupboard Core The role of the Cupboard Core component is twofold e it provides the necessary interfaces to integrate the other components of the system and to federate them in order to offer a comple
21. egrated Project EU IST 027595 This document is part of the NeOn research project funded by the IST Programme of the Commission of the European Communities by the grant number IST 2005 027595 The following partners are involved in the project Open University OU Coordinator Knowledge Media Institute KMi Berrill Building Walton Hall Milton Keynes MK7 6AA United Kingdom Contact person Martin Dzbor Enrico Motta E mail address m dzbor e motta open ac uk Universidad Polit cnica de Madrid UPM Campus de Montegancedo 28660 Boadilla del Monte opain Contact person Asunci n G mez P rez E mail address asun fi ump es Intelligent Software Components S A ISOCO Calle de Pedro de Valdivia 10 28006 Madrid opain Contact person Jesus Contreras E mail address jcontreras isoco com Institut National de Recherche en Informatique et en Automatique INRIA ZIRST 665 avenue de l Europe Montbonnot Saint Martin 38334 Saint Ismier France Contact person J r me Euzenat E mail address jerome euzenat inrialpes fr Universitat Kolenz Landau UKO LD Universitatsstrasse 1 56070 Koblenz Germany Contact person Steffen Staab E mail address staab uni koblenz de Ontoprise GmbH ONTO Amalienbadstr 36 Raumfabrik 29 76227 Karlsruhe Germany Contact person Jurgen Angele E mail address angele ontoprise de Atos Origin S A ATOS Calle de Albarracin 25 28037 Madrid Spain Contact person Tomas
22. eir institutions Page 24 of 29 NeOn Integrated Project EU IST 027595 Keywords university search Found 10 entities bo a rd Ontology URI http localhost8080 cupboard ontology selahi selahiT C 4 hip iannotation semanticweb org 2004 iswctitUniversity of Karlsruhe 4 h p annotation semanticweb org 2004 iswcitUniversity of Karlsruhe 4 hip annotation semanticweb org 2004 iswc University_of Karlsruhe 4 hip annotation semanticweb org 2004 iswcitUniversity of Karlsruhe 4 hitp annotation semanticweb org 2004 iswcitUniversity of Karlsruhe Gnip annotation semanticweb org 2004 iswcitUniversity Ghitp annotation semanticweb org 2004 iswcitUniversity Gnup iannoration semanticweb org 2004 iswcitUniversity Ghttp annotation semanticweb org 2004 iswcitUniversity pup iannotation semanticweb org 2004 iswc tUniversity Figure 5 11 A result set for the query for University within the specified ontology bo a rd Ontology URI hitp i localhost8080 cupboard ontology selahi selahiT UD e umm ls Found 10 entities C hip annotation semanticweb org 2004 iswcitUniversity of Karlsruhe Label Comment null hip annotation semanticweb org 2004 iswcitUniversity of Karlsruhe Label Comment null hip annotation semanticweb org 2004 iswcitUniversity of Karlsruhe l Label Comment null hi p annotation
23. ely deploy and expose their ontologies for use and reuse Ontology search engines provide a partial answer to this problem as they support users in finding selecting and in some cases using ontologies see e g aMS 08 However they still lack mechanisms for assess ing ontologies for providing rich ontology metadata for providing alignments between ontologies etc In other terms they only focus on providing the ontologies without leaving ontology publishers and users any control or any possibility of interaction among themselves and with the ontologies In addition there have been several initiatives coming up with ontology repositories lately see e g MSN 08 BEDO4 However these systems are either too closed e g not letting users add ontologies or they did not draw a significant number of participants In general the benefits for ontology engineers of exposing ontologies through these repositories is not obvious as there is currently no clear incentive Apart from the Watson ontology search engine already mentioned the NeOn projecf is developing a number of technologies that if put together and integrated in a broader system can provide a more comprehensive answer to the aforementioned problem More specifically Oyster is a peer to peer ontology shar ing system which relies on rich metadata for ontologies using the OMV format HPS 05 The alignment server Euz04 is an open system dedicated to the creation managemen
24. he main challenges during integration were defining the interfaces between components optimizing the performance and generating an easy to use Web inter face So while Cupboard is building on existing systems the user experience is completely different and we believe that users will find it easier to take advantage of all the available techniques As depicted in Figure the central component of Cupboard is a specifically made component called the Cupboard core which is in charge of orchestrating the interaction between all the other components external applications and users It heavily relies on the Watson engine to provide basic functionalities such as storing the ontologies indexing them for search validating them and exposing them to applications The TS ORS open rating system the Oyster ontology metadata sharing system and the Alignment Server each provide specific functionalities to the system that are federated and exposed in an homogeneous way to the Cupboard Web interface and APIs through the Cupboard core 2006 2009 C Copyright lies with the respective authors and their institutions Ansibay e epejoyy OJul IsnJ pue oseg SOXopul jueujuDi v xf JONES SYO SL ISAO jueuluBi y SMoinol Bjoul T AWO SjueuiuDi v boJoiuO NeOn Integrated Project EU IST 027595 SODIAIOS UOS eM Jexepu uosjeM SaIDoJoluO jueuoduio 9814025 pueoqdny idy pueoqdny 928J1J91u q M puJeoqdn Id v uBily
25. ing to run their own local version of Cupboard This package will then come with a dedicated developer and system administrator handbook Our local installation can be found at http kmi web06 open ac uk 8081 cupboard At the moment we display a screen with information on how to become a betatester see fig 5 1 5 1 2 Getting started Logging in You can normally log into the system using your OpenID see fig 5 2 Once logged in the Ontology Space of the logged in user is displayed for more information seelhttp openid net cupoara Welcome to Cupbaard This service is currently in development A Beta version will be available soon If you wantto be among the firsts to possess their own Ontology Space on Cupboard send an e mail ta Mathieu d Aquin with your Gpen d and the name of your Ontology Space You will then be added to the list of Beta Testers of Cupboard and have the chance to have your own space on the Semantic Web very soon Figure 5 1 This welcome screen is currently displayed when surfing to the Cupboard website D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 19 of 29 cupere OpenID Figure 5 2 The system accepts an OpenID as login credential board up C selahi Ontology Space Home Add Ontology Search Logout selahiFourth http swrc ontoware arcg antalaqy 0 7 70 statements ROF OWL 1168 sta
26. lopers of ontologies it offers a complete infrastructure to host their ontologies in online ontology spaces provid ing mechanisms to describe manage and effectively exploit these ontologies through APIs Furthermore these ontologies are then exposed to the community providing users with a complete friendly environment to find assess and reuse ontologies We furthermore describe the current state of implementation and the plan for completing the rest Also a user s guide is provided to guide the users through the application D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 5 of 29 Contents 1 Introduction What is Cupboard 7 8 pee ee ane eh ee nese ee eee ee ee eaten eeeew nee ee hee ee oe 8 t eu E eee S E XE RR nee tae eee ee eee eee ee x 9 11 3 1 Details of the Current Implementation lll 11 3 1 1 The Cupboard Core z icem xo ee we RSP ee ox e XR RO OO 9 e oo m 11 3 1 2 Integration of Watson llle 12 3 1 3 Integration of Oyster a a a elles lass 12 3 1 4 Integration of the TS ORS review system a lll ln 13 3 2 Availability s a ss ta ee ea ee eas eae es ee eee eRe ee owe ew eee eo Be ow Go 13 3 3 Scheduled Developments 2 1 lll a 14 3 3 1 Integration of the Alignment Server March 2009 lll ll ns 14 3 3 2 Integration of advanced visualization mechanism April 2009
27. nisms rich metadata and proper assessment of the ontologies are required To tackle these problems we propose a complete system based on a number of well established technologies allowing ontology engineers to deploy their ontologies providing the necessary infrastruc tures to support their exploitation and ontology users in reusing available knowledge providing essential community based functionalities to facilitate the search selection and exploitation of the available ontologies To the best of our knowledge Cupboard is the first system to put together all these functionalities to create an essential infrastructure component for Semantic Web developers and more generally a useful shared and open environment for the ontology community We have also presented a detailled overview of what is available now and what will be implemented at a later stage Furthermore a user manual provided as an appendix 2006 2009 C Copyright lies with the respective authors and their institutions Page 18 of 29 NeOn Integrated Project EU IST 027595 Chapter 5 Appendix 5 1 User Manual We plan to also have the latest version of the user manual linked from the Cupboard website 5 1 1 Installation Cupboard does not have to be installed by the end user it is accessible by Web Browser currently tested on Firefox and Safari by simply entering the URI We will however at a later point make a complete Cupboard package available for companies want
28. of alignment content correspondences within Cupboard alignment rating through ORS in a latter phase 3 3 2 Integration of advanced visualization mechanism April 2009 NeOn workpackage 4 is currently developing novel tools and techniques to visualize and navigate within ontologies Dzb09 The idea is to rely on a summary of an ontology in the form of key concepts The key concepts provide an general overview of the content of the ontology allowing users to quickly make sense of what it is about and if it could be of particular interest Based on the technique described in to extract key concepts from an ontology new visualization methods are devised that not only provide a preview of an ontology but also allow the user to expand this preview by zooming in to more detailed content and to identify focus points within these detailed views Such visualization techniques are of evident interest for the Cupboard system and will be integrated within the user interface in order to provide the user with a rapid overview of the content of ontologies exposed through an ontology space D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 15 of 29 3 3 3 Federated API and NeOn Toolkit Plugins May 2009 As explained before one of the core aspect of Cupboard is not only to provide user interfaces for sharing finding and using ontologies but also a complete set of services
29. on project org 2006 2009 C Copyright lies with the respective authors and their institutions Page 8 of 29 NeOn Integrated Project EU IST 027595 Chapter 2 The Cupboard System Cupboard is different from classical ontology repository systems as it does not provide one single space where ontologies are exposed On the contrary each user can create his her own ontology space containing the ontologies he she has selected In a sense Cupboard can be seen more as a system to host ontology repositories than as an ontology repository itself 2 1 Overview The main advantage in relying on this notion of ontology spaces is that each ontology space virtually im plements a complete infrastructure for building semantic applications Indeed each uploaded ontology is automatically indexed using the Watson engine Watson is designed to be an ontology search engine but focuses on providing the necessary access mechanisms through services APIs SPARQL etc to enable semantic applications to dynamically exploit ontologies made available online see In Cupboard each ontology space becomes like a little Watson making it possible for developers to easily build applica tions exploiting the exposed ontologies However for ontology and application developers Cupboard s ontology spaces should do more than listing ontologies To be used jointly in applications ontologies have to be related with each other Using the Align ment Server as a core
30. r the ontology clicking on the sign also the other categories can be extended so that metadata can be entered see fig 5 7 Whenever possible we use controlled vocabularies which then are presented as a drop down list see fig 5 7 In the ontology space ontology metadata can be seen when clicking on the URI of the ontology see fig 5 8 Search If Cupboard the user can access the search functionality by either clicking on search in the ontology space see fig 5 3 or search an ontology directly from the metadata view see fig 5 8 The search screen can be seen in fig 5 9 The user can enter a search term and also specify specific search options Once the results are found they are presented see fig 5 10 to the user It is also possible to search within an ontology see fig 5 11 The resultset can be extended by clicking on the signs see fig 5 10 Reviews and Reviewing One of the central ideas of Cupboard is to also allow the community to make use of other users experience We therefore allow for detailled reviews of the ontologies and employ a sophisticated ranking system to provide the results in a user specific order When a user clicks on Write a review a form is displayed see fig b 13 that allows the user to rate each of the ontological properties defined in the system by selecting a 1 5 star rating They can and should also comment on the rating explaining why this star rating
31. rank ontologies according to these evaluations However reviews are subjective evaluations as users might have different views on ontologies When searching for an ontology to reuse not only the review information should be exploited to support the user but also the information about how much he she would trust a particular review or a particular reviewer Such trust information is obtained through the classical Did you find this re view useful question and handled by the TS ORS system to compute trust information used to personalize D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 9 of 29 G e O 6 Cupboard Upload Ontology eoo Ontology Details 3 http u E _check html q ICS 5 4 x http localhost 8080 cupboard upload oma E 6 ah EE 8080 cupboard search onto check html g http localhost 8080 ee i QA MOAW ThinkGeek ition Slinky CGHRC We dIRC Client Semantic Bus y Part One Semantic Bus y Part Two o LI MOAW ThinkGeek ition Slinky CGEIRC We d IRC Client Semantic Bus y Part One Semantic Bus y Part Two Commercial FX Dealers r C u boa rd Details for http localhost 8080 cupboard ontology xcv ISWC Research Field Q gt cupoa d Ad
32. ser is also available to explore http kmi web06 open ac uk 8081 cupboard test2 2006 2009 C Copyright lies with the respective authors and their institutions Page 14 of 29 NeOn Integrated Project EU IST 027595 3 3 Scheduled Developments The current prototype for the Cupboard system constitutes a promising first step towards a more complete and robust system providing users and application developers with the ability to create their own space on the semantic web to share expose and reuse networked ontologies in a efficient and collaborative environment Below we list and detail the next steps in the development of Cupboard to achieve this goal 3 3 1 Integration of the Alignment Server March 2009 Alignment servers are middleware components of the semantic web infrastructure for storing and sharing alignments They enable applications to share high quality and well referenced alignments featuring metadata annotations Alignment servers provide access to libraries of matchers and alignments and offer retrieval manipulation through applying threshold or transformations and export of alignments under the adequate format It is accessible from web browsers integrated development environments web services and agents Thanks to its plug in architecture it can be extended by new matchers renderers communication drivers and directories They can be used by semantic web applications as well as by the infrastructure itself They can be
33. t and evaluation of ontology align ments In addition a topic specific open rating system TS ORS for ontologies is being developed to allow users to review different properties of ontologies and to express trust in reviewers In this deliverable we present Cupboard an online system that relies on these components and integrates them to provide a complete and friendly environment for ontology publishing sharing and reuse One of the most important questions addressed in this development concerns the incentives provided for an ontology engineer to share his her ontology and invest the time to properly add it to a repository For many users setting up their own server infrastructure generating search indexes and setting up SPARQL endpoints was quite a cumbersome task Cupboard does not only allow users to add their ontologies in a personal space but actually indexes them using the Watson engine provides mechanism to link them using the Alignment Server hosts them and exposes them through APIs and SPARQL thus offering the infrastructure for engi neers to deploy their ontologies with minimal efforts Moreover Cupboard is designed to be a community tool helping ontology users and practitioners including ontology developers in finding and reusing ontologies through the use of rich ontology metadata thanks to Oyster and OMV and to advanced ontology review mechanisms using the TS ORS system httpor watson kmy oper ac uk http ne
34. tation Cupboard is intended to be deployed in a unique server providing a central point for sharing and finding ontologies However for various reasons we intend to distribute the system as an open source package that individual organizations can install on their own servers and use locally This could be useful in particular when ontologies cannot be shared externally for privacy reasons This would lead to the deployment of several Cupboard servers that should be linked with each other and communicate thus making Cupboard a distributed access point to shared ontologies rather than a central one his require additional efforts to implement communication and query routing mechanisms between Cupboard servers which will rely on existing mechanisms implemented by the integrated components e g the P2P network of Oyster or the distributed version of Watson relying on the P2P architecture of the Open Knowledge project GLP 08 3 4 Release Plan As explained before Cupboard is currently at the stage of prototype and is being tested by contributors to its development Besides the development plan a release plan has been devised fixing the targets and objectives towards the final launch of Cupboard and its opening to external users for registration This release plan also include testing the system on concrete use cases by supporting experiments and systems developed within NeOn February 2009 now Demonstration and test system including 2
35. te set of functionalities e it provides the interfaces to the external world in particular user interfaces to access the functionalities offered by the other components in an homogeneous way As such the Cupboard Core is the only part of the development of Cupboard which is entirely new and which do not rely on the reuse of previously existing components In the following mentions to the integration of components to Cupboard concretely relate to the implementation within the Cupboard Core of the interaction with specific components Concretely the Cupboard Core is implemented as a Java Web application i e a set of servlet enhanced with Javascript based interface elements It provides on the one hand a set of GUls for the functions provided by Cupboard see Figure 2 1 and on the other hand the back end operations relying on the integrated components to realize these functions It is also intended to provide a complete API to build applications on top of exposed ontology spaces but currently only realizes a very limited sub part of the planned functions see Section 3 3 2006 2009 C Copyright lies with the respective authors and their institutions Page 12 of 29 NeOn Integrated Project EU IST 027595 3 1 2 Integration of Watson The Watson systen can be seen as a search engine for the Semantic Web It supports users and appli cations in finding selecting and re using ontologies that are available online through advan
36. tegration of Oyster Oyster is a distributed registry that exploits semantic web techniques in order to provide a solution for ex changing and re using ontologies and related entities As an ontology registry it provides services for stor age cataloging discovery management and retrieval of ontology and related entities metadata definitions To achieve these goals Oyster implements the proposal for metadata standard OMV as the way to de scribe ontologies and related entities supporting advanced semantic searches of the registered objects and providing services to support the management and evolution of ontologies in distributed environments The role of Oyster in Cupboard is the management of OMV metadata for the ontologies exposed within ontology spaces in order to facilitate their discovery by supporting metadata based searches Hence the integration is realized by deploying an Oyster peer within the Cupboard server that is populated by metadata about every ontology uploaded into the system Concretely a local Oyster peer running in server mode is accessed by the Cupboard system via its API Consequently ontologies exposed within Cupboard also become available to the whole Oyster network In practice it provides the following functionalities e Storing OMV metadata for ontologies exposed within ontology spaces e Retrieving OMV metadata for displaying ontology details e Searching for ontologies using metadata based conditions e E
37. tements RDF OWL Write a Rewiew Write a Review x amp Read Reviews yx w 9 Read Reviews selahiseventh selahiEigth 2332 statements RDF OWL Read Reviews 32 statements RDF OWL Write a Review Write a Review Read Reviews selahiThird 411 statements RDF OWL Write a Review Xt Read Reviews Figure 5 3 The ontology space contains all ontologies added by the user It also displays additional metadata of the ontologies 5 1 3 Ontology Space The ontology space for an example see fig 5 3 contains all the ontologies added by a user If you browse your own ontology space you can find all the ontologies you added It is like the home screen of Cupboard For each ontology the title number of statements format and overall rating are displayed From this screen you have several options Add an ontology search write a review or read reviews We will now explain each of these functionalities 5 1 4 Adding an ontology When you click on Add Ontology in your ontology space you will get a dialog that allows you to upload ontologies You can enter the name and either specify a location on the filesystem where your ontology is located or enter the ontology source code directly see fig 5 4 We will also allow adding ontologies by URI very soon After the ontology has been added the URI has to be adapted to be properly accessible within Cupboard The adaptation can be done by simply clicking the button see fig
38. test users Deployed on a server at the OU and accessible from outside to allow NeOn members to try and test the system April 2009 Working prototype used for the reuse experiment in WP5 Small numbers of ontology spaces populated with existing ontologies and metadata Selected users manually registered to provide re views on these ontologies June 2009 Use of Cupboard for the ontologydesignpatterns org portal A couple of dedicated ontology spaces automatically populated from contributions to the portal The Cupboard API used in the portal to provide search and reuse functionalities 2006 2009 C Copyright lies with the respective authors and their institutions Page 16 of 29 NeOn Integrated Project EU IST 027595 June 2009 Opening of Cupboard as a beta system to external users on invitation September 2009 Opening of Cupboard for any user to register January 2010 Distribution of Cupboard as an installable open source package D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 17 of 29 Chapter 4 Conclusion In this document we presented Cupboard an online ontology publishing and sharing environment that addresses two major problems faced by the Semantic Web community the deployment of inter linked ontologies for exploitation in applications often requiring heavy infrastructures and the reuse of existing ontologies where besides search mecha
39. used at two different moment in applications at design time through invocation by design and engineering environments they can be integrated within development environments where they will be loosely coupled components which may be asked for alignments and for exploiting these alignments like the NeOn toolkit through the NeOn Alignment plug in DdB 08 at run time alignment servers can be invoked directly by the application Cupboard takes advantage of Alignment servers in order to connect ontologies together with alignment Hence an Alignment server will provide on demand alignments between ontologies referred to in Cupboard These alignments remain stored in the Alignment server and Cupboard maintain the references to these alignments This provides a convenient way to store networked ontologies within Cupboard The integration of Alignment servers with Cupboard results from a loose coupling between Cupboard and available remote servers Cupboard uses the extended REST web service interface in order to obtain infor mation from an Alignment server Cupboard will integrate the Alignment API which is the basis of Alignment servers so as to manipulate easily alignments and information about alignments In practice the integration will provide the following functions reference to alignments from the Cupboard ontology descriptions functions to import alignments within Cupboard display of alignment metadata within Cupboard display
40. xtracting metadata information from uploaded ontologies that is then complemented with Watson extracted metadata httpor watson km opern ac uk http omv ontoware org D1 4 3 Cupboard Supporting Ontology Reuse by Combining a Semantic Web Gateway Ontology Registry and Open Ratings Systems Page 13 of 29 3 1 4 Integration of the TS ORS review system The topic specific open rating system provides users the possibility to review ontologies within Cupboard For each of the properties of the ontologies they can provide a 5 star rating and a textual explanation for the rating Other users can specify whether they find the reviews helpful and thereby express trust to the reviewers Based on the web of trust the reviews can be ranked in a user specific way and also overall ratings of the ontologies can be computed according to a users needs and preferences For more technical information see LSNMO6 SAd 07 The role of TS ORS in Cupboard is to add user based evaluation to the ontologies Without quality informa tion available it is hard for users to judge with ontology is good enough to be reused in their applications ontologies Because evaluating the ontologies themselves can take quite some time user like to rely on existing evaluations The quality information provided by the community can then be used to order reviews of the ontologies and also the ontologies themselves based on user specific trust and parameters The TS ORS
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