http://test.websemanticsjournal.org/openacademia/ http://test.websemanticsjournal.org/openacademia/ http://test.websemanticsjournal.org/openacademia/papers/2007119/JWS-D-07-00092[1].pdf This paper presents a novel, knowledge-based method for measuring semantic similarity in support of applications aimed at organizing and retrieving relevant textual information. We show how a quantitative context may be established for what is essentially qualitative in nature by effecting a topological transformation of the lexicon into a metric space where distance is well-defined. We illustrate the technique with a simple example and report on promising experimental results with a significant word similarity problem. Del Jensen, Christophe Giraud-Carrier, Nathan Purser. A Method for Computing Lexical Semantic. Journal of Web Semantics, 2008 This paper presents a novel, knowledge-based method for measuring semantic similarity in support of applications aimed at organizing and retrieving relevant textual information. We show how a quantitative context may be established for what is essentially qualitative in nature by effecting a topological transformation of the lexicon into a metric space where distance is well-defined. We illustrate the technique with a simple example and report on promising experimental results with a significant word similarity problem. Del Jensen Del Jensen Del Jensen -1550328532 Christophe Giraud-Carrier Christophe Giraud-Carrier Christophe Giraud-Carrier 1528760704 Nathan Purser Nathan Purser Nathan Purser 1215360783 Journal of Web Semantics Semantic Distance and Knowledge-based Semantics A Method for Computing Lexical Semantic 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/UsingSemWebforLinkingBojarsV6I1.pdf Large volumes of content (bookmarks, reviews, videos, etc.) are currently being created on the "Social Web", i.e. on Web 2.0 community sites, and this content is being annotated and commented upon. The ability to view an individual's entire contribution to the Social Web would be an interesting and valuable service, particularly important as social networks are often being formed through created content and things that people have in common ("objectcentred sociality"). SIOC is a Semantic Web research project that aims to describe online communities on the Social Web. This paper describes how SIOC and the Semantic Web can enable linking and reuse scenarios of data from Web 2.0 community sites, and introduces a SIOC Types module to further specify the type of content items and act as a "glue" between user posts and the content items created and annotated by users. Uldis Bojars, John G Breslin, Aidan Finn. Using the Semantic Web for Linking and Reusing Data Across Web 2.0 Communities. Journal of Web Semantics 6(1), 2008 Large volumes of content (bookmarks, reviews, videos, etc.) are currently being created on the "Social Web", i.e. on Web 2.0 community sites, and this content is being annotated and commented upon. The ability to view an individual's entire contribution to the Social Web would be an interesting and valuable service, particularly important as social networks are often being formed through created content and things that people have in common ("objectcentred sociality"). SIOC is a Semantic Web research project that aims to describe online communities on the Social Web. This paper describes how SIOC and the Semantic Web can enable linking and reuse scenarios of data from Web 2.0 community sites, and introduces a SIOC Types module to further specify the type of content items and act as a "glue" between user posts and the content items created and annotated by users. Uldis Bojars Uldis Bojars Uldis Bojars 794278908 John G Breslin John G Breslin John G Breslin -1987457834 Aidan Finn Aidan Finn Aidan Finn 1225483112 Journal of Web Semantics RDF, Semantic Web, SIOC, Social Software, Web 2.0 1 Using the Semantic Web for Linking and Reusing Data Across Web 2.0 Communities 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/TheTwoCulturesV6I1.pdf A common perception is that there are two competing visions for the future evolution of the Web: the Semantic Web and Web 2.0. A closer look, though, reveals that the core technologies and concerns of these two approaches are complementary and that each field can and must draw from the other's strengths. We believe that future Web applications will retain the Web 2.0 focus on community and usability, while drawing on Semantic Web infrastructure to facilitate mashup-like information sharing. However, there are several open issues that must be addressed before such applications can become commonplace. In this paper, we outline a semantic weblogs scenario that illustrates the potential for combining Web 2.0 and Semantic Web technologies, while highlighting the unresolved issues that impede its realization. Nevertheless, we believe that the scenario can be realized in the short-term. We point to recent progress made in resolving each of the issues as well as future research directions for each of the communities. Anupriya Ankolekar, Markus Krozsch, Thanh Tran, Denny Vrandecic. The Two Cultures: Mashing up Web 2.0 and the Semantic Web. Journal of Web Semantics 6(1), 2008 A common perception is that there are two competing visions for the future evolution of the Web: the Semantic Web and Web 2.0. A closer look, though, reveals that the core technologies and concerns of these two approaches are complementary and that each field can and must draw from the other's strengths. We believe that future Web applications will retain the Web 2.0 focus on community and usability, while drawing on Semantic Web infrastructure to facilitate mashup-like information sharing. However, there are several open issues that must be addressed before such applications can become commonplace. In this paper, we outline a semantic weblogs scenario that illustrates the potential for combining Web 2.0 and Semantic Web technologies, while highlighting the unresolved issues that impede its realization. Nevertheless, we believe that the scenario can be realized in the short-term. We point to recent progress made in resolving each of the issues as well as future research directions for each of the communities. Ankolekar, Anupriya Anupriya Ankolekar Anupriya Ankolekar Anupriya Ankolekar -1020830646 Markus Krozsch Markus Krozsch Markus Krozsch -2140643007 Thanh Tran Thanh Tran Thanh Tran 1141980946 Denny Vrandecic Denny Vrandecic Denny Vrandecic 693503293 Journal of Web Semantics Web 2.0, Semantic Web, Blog, RDF, Vision 1 The Two Cultures: Mashing up Web 2.0 and the Semantic Web 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/SweetWikiBuffaV6I1.pdf Everyone agrees that user interactions and social networks are among the cornerstones of "Web 2.0". Web 2.0 applications generally run in a web browser, propose dynamic content with rich user interfaces, offer means to easily add or edit content of the web site they belong to and present social network aspects. Well-known applications that have helped spread Web 2.0 are blogs, wikis, and image/video sharing sites; they have dramatically increased sharing and participation among web users. It is possible to build knowledge using tools that can help analyze users' behavior behind the scenes: what they do, what they know, what they want. Tools that help share this knowledge across a network, and that can reason on that knowledge, will lead to users who can better use the knowledge available, i.e., to smarter users. Wikipedia, a wildly successful example of web technology, has helped knowledge-sharing between people by letting individuals freely create and modify its content. But Wikipedia is designed for people - today's software cannot understand and reason on Wikipedia's content. In parallel, the "semantic web", a set of technologies that help knowledge-sharing across the web between different applications, is starting to gain attraction. Researchers have only recently started working on the concept of a "semantic wiki", mixing the advantages of the wiki and the technologies of the semantic web. In this paper we will present a state-of- the-art of semantic wikis, and we will introduce SweetWiki, an example of an application reconciling two trends of the future web: a semantically-augmented web and a web of social applications where every user is an active provider as well as a consumer of information. SweetWiki makes heavy use of semantic web concepts and languages, and demonstrates how the use of such paradigms can improve navigation, search, and usability. Michel Buffa, Fabien Gandon, Peter Sander, Catherine Faron, Guillaume Ereteo. SweetWiki: a semantic wiki. Journal of Web Semantics 6(1), 2008 Everyone agrees that user interactions and social networks are among the cornerstones of "Web 2.0". Web 2.0 applications generally run in a web browser, propose dynamic content with rich user interfaces, offer means to easily add or edit content of the web site they belong to and present social network aspects. Well-known applications that have helped spread Web 2.0 are blogs, wikis, and image/video sharing sites; they have dramatically increased sharing and participation among web users. It is possible to build knowledge using tools that can help analyze users' behavior behind the scenes: what they do, what they know, what they want. Tools that help share this knowledge across a network, and that can reason on that knowledge, will lead to users who can better use the knowledge available, i.e., to smarter users. Wikipedia, a wildly successful example of web technology, has helped knowledge-sharing between people by letting individuals freely create and modify its content. But Wikipedia is designed for people - today's software cannot understand and reason on Wikipedia's content. In parallel, the "semantic web", a set of technologies that help knowledge-sharing across the web between different applications, is starting to gain attraction. Researchers have only recently started working on the concept of a "semantic wiki", mixing the advantages of the wiki and the technologies of the semantic web. In this paper we will present a state-of- the-art of semantic wikis, and we will introduce SweetWiki, an example of an application reconciling two trends of the future web: a semantically-augmented web and a web of social applications where every user is an active provider as well as a consumer of information. SweetWiki makes heavy use of semantic web concepts and languages, and demonstrates how the use of such paradigms can improve navigation, search, and usability. Michel Buffa Michel Buffa Michel Buffa -1507951450 Gandon, Fabien L. Fabien Gandon Fabien L. Gandon Fabien L. Gandon 231765485 Peter Sander Peter Sander Peter Sander -1635665005 Catherine Faron Catherine Faron Catherine Faron -1013078711 Guillaume Ereteo Guillaume Ereteo Guillaume Ereteo 1913953805 Journal of Web Semantics Wiki, Semantic Web, Social Tagging, Ontology, Web 2.0, acquaintance networks 1 SweetWiki: a semantic wiki 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/MetcalfsLawGolbeckV6I1.pdf The power of the Web is enhanced through the network effect produced as resources link to each other with the value determined by Metcalfe's law. In Web 2.0 applications, much of that effect is delivered through social linkages realized via social networks online. Unfortunately, the associated semantics for Web 2.0 applications, delivered through tagging, is generally minimally hierarchical and sparsely linked. The Semantic Web suffers from the opposite problem. Semantic information, delivered through ontologies of varying amounts of expressivity, is linked to other terms (within or between documents) creating a link space in the semantic realm. However, the use of the Semantic Web has yet to fully realize the social schemes that provide the network of users. In this article, we discuss putting these together, with linked semantics coupled to linked social networks, to deliver a much greater effect. James Hendler, Jennifer Golbeck. Metcalfe's Law Applies to Web 2.0 and the Semantic Web. Journal of Web Semantics 6(1), 2008 The power of the Web is enhanced through the network effect produced as resources link to each other with the value determined by Metcalfe's law. In Web 2.0 applications, much of that effect is delivered through social linkages realized via social networks online. Unfortunately, the associated semantics for Web 2.0 applications, delivered through tagging, is generally minimally hierarchical and sparsely linked. The Semantic Web suffers from the opposite problem. Semantic information, delivered through ontologies of varying amounts of expressivity, is linked to other terms (within or between documents) creating a link space in the semantic realm. However, the use of the Semantic Web has yet to fully realize the social schemes that provide the network of users. In this article, we discuss putting these together, with linked semantics coupled to linked social networks, to deliver a much greater effect. Hendler, James James Hendler James Hendler James Hendler -1210729408 Golbeck, Jennifer Jennifer Golbeck Jennifer Golbeck Jennifer Golbeck 916056224 Journal of Web Semantics Semantic Web, Web 2.0, Social networks, tagging, Metcalfe's Law 1 Metcalfe's Law Applies to Web 2.0 and the Semantic Web 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/MassArgumentationRahwanV6I1.pdf The World Wide Web (WWW) can be seen as an ideal platform for enhancing argumentative expression and communication, due to its ubiquity and openness. Much argumentation takes place on personal blogs and on unstructured or semi- structured discussion forums. Recently, an increasing number of Web 2.0 applications provide specific support for large-scale socially-contributed argumentative content. When compared with traditional methods of Web discourse, these tools enable better visualisation, navigation and analysis of the `state of the debate' by participants and, potentially, by automated tools. In this paper, I outline some potential benefits of Semantic Web techniques in supporting mass- scale, sociallycontributed argument tagging. I also present some recent research in this direction. Iyad Rahwan. Mass Argumentation and the Semantic Web. Journal of Web Semantics 6(1), 2008 The World Wide Web (WWW) can be seen as an ideal platform for enhancing argumentative expression and communication, due to its ubiquity and openness. Much argumentation takes place on personal blogs and on unstructured or semi- structured discussion forums. Recently, an increasing number of Web 2.0 applications provide specific support for large-scale socially-contributed argumentative content. When compared with traditional methods of Web discourse, these tools enable better visualisation, navigation and analysis of the `state of the debate' by participants and, potentially, by automated tools. In this paper, I outline some potential benefits of Semantic Web techniques in supporting mass- scale, sociallycontributed argument tagging. I also present some recent research in this direction. Iyad Rahwan Iyad Rahwan Iyad Rahwan 1167834344 Journal of Web Semantics Argumentation, Web 2.0, Semantic Web 1 Mass Argumentation and the Semantic Web 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/hGRDDLAdidaV6I1.pdf We propose hGRDDL (pronounced "h-griddle"), a simple mechanism for transforming ad-hoc HTML-embedded structured data, such as microformats, into RDFa. This technique preserves the advantages of the original syntax, notably the correspondence between the rendered HTML and the related structured data, and requires little change on the publisher end. RDFa tool developers can leverage the existing deployments of microformats, while focusing new deployments on RDFa for greater extensibility and consistency, all using the same client-side toolset. We provide a prototype implementation of the hGRDDL processor and of transformations for hCard and hCal, two popular microformats. Ben Adida. hGRDDL: Bridging Microformats and RDFa. Journal of Web Semantics 6(1), 2008 We propose hGRDDL (pronounced "h-griddle"), a simple mechanism for transforming ad-hoc HTML-embedded structured data, such as microformats, into RDFa. This technique preserves the advantages of the original syntax, notably the correspondence between the rendered HTML and the related structured data, and requires little change on the publisher end. RDFa tool developers can leverage the existing deployments of microformats, while focusing new deployments on RDFa for greater extensibility and consistency, all using the same client-side toolset. We provide a prototype implementation of the hGRDDL processor and of transformations for hCard and hCal, two popular microformats. Ben Adida Ben Adida Ben Adida 343854976 Journal of Web Semantics RDFa, GRDDL, microformats, web 2.0 1 hGRDDL: Bridging Microformats and RDFa 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/EaseofInteractionHeathV6I1.pdf Web2.0 has enabled contributions to the Web on an unprecedented scale, through simple interfaces that provide engaging interactions. This wealth of data has spawned countless mashups that integrate heterogenous information, but using techniques that will not scale beyond a handful of sources. In contrast, the Semantic Web provides the key to large-scale data integration, yet still lacks approachable interfaces allowing contributions from non- specialists. In this paper we present Revyu, a reviewing and rating site in the Web2.0 mould that is built on Semantic Web infrastructure and both publishes and consumes linked RDF data. This combination of approaches affords ease of interaction for regular users and ease of integration with external data sources. Tom Heath, Enrico Motta. Ease of Interaction plus Ease of Integration: Combining Web2.0 and the Semantic Web in a Reviewing Site. Journal of Web Semantics 6(1), 2008 Web2.0 has enabled contributions to the Web on an unprecedented scale, through simple interfaces that provide engaging interactions. This wealth of data has spawned countless mashups that integrate heterogenous information, but using techniques that will not scale beyond a handful of sources. In contrast, the Semantic Web provides the key to large-scale data integration, yet still lacks approachable interfaces allowing contributions from non- specialists. In this paper we present Revyu, a reviewing and rating site in the Web2.0 mould that is built on Semantic Web infrastructure and both publishes and consumes linked RDF data. This combination of approaches affords ease of interaction for regular users and ease of integration with external data sources. Tom Heath Tom Heath Tom Heath 1536630748 Enrico Motta Enrico Motta Enrico Motta 86226395 Journal of Web Semantics user interaction, data integration, reviews, semantic web, web2.0 1 Ease of Interaction plus Ease of Integration: Combining Web2.0 and the Semantic Web in a Reviewing Site 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/DiscoveringSharedConceptualizationsStummeV6I1.pdf Social bookmark tools are rapidly emerging on the Web. In such systems users are setting up lightweight conceptual structures called folksonomies. Unlike ontologies, shared conceptualisations are not formalised, but rather implicit. We present a new data mining task, the emphmining of all frequent tri-concepts, together with an efficient algorithm, for discovering these implicit shared conceptualisations. Our approach extends the data mining task of discovering all closed itemsets to three- dimensional data structures to allow for mining folksonomies. We provide a formal definition of the problem, and present an efficient algorithm for its solution. Finally, we show the applicability of our approach on three large real-world examples. Robert Jaschke, Andreas Hotho, Christoph Schmitz, Bernhard Ganter, Gerd Stumme. Discovering Shared Conceptualizations in Folksonomies. Journal of Web Semantics 6(1), 2008 Social bookmark tools are rapidly emerging on the Web. In such systems users are setting up lightweight conceptual structures called folksonomies. Unlike ontologies, shared conceptualisations are not formalised, but rather implicit. We present a new data mining task, the emphmining of all frequent tri-concepts, together with an efficient algorithm, for discovering these implicit shared conceptualisations. Our approach extends the data mining task of discovering all closed itemsets to three- dimensional data structures to allow for mining folksonomies. We provide a formal definition of the problem, and present an efficient algorithm for its solution. Finally, we show the applicability of our approach on three large real-world examples. Robert Jaschke Robert Jaschke Robert Jaschke 1646159085 Andreas Hotho Andreas Hotho Andreas Hotho -616142814 Schmitz, Christoph Christoph Schmitz Christoph Schmitz Christoph Schmitz 755500480 Bernhard Ganter Bernhard Ganter Bernhard Ganter -1077425325 Gerd Stumme Gerd Stumme Gerd Stumme -513328143 Journal of Web Semantics folksonomies, social bookmarking, formal concept analysis, closed itemset mining, ontology learning 1 Discovering Shared Conceptualizations in Folksonomies 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/CollectiveKnowledgeSystemsGruberV6I1.pdf What can happen if we combine the best ideas from the Social Web and Semantic Web? The Social Web is an ecosystem of participation, where value is created by the aggregation of many individual user contributions. The Semantic Web is an ecosystem of data, where value is created by the integration of structured data from many sources. What applications can best synthesize the strengths of these two approaches, to create a new level of value that is both rich with human participation and powered by wellstructured information? This paper proposes a class of applications called collective knowledge systems, which unlock the "collective intelligence" of the Social Web with knowledge representation and reasoning techniques of the Semantic Web. Thomas Gruber. Collective Knowledge Systems: Where the Social Web meets the Semantic Web. Journal of Web Semantics 6(1), 2008 What can happen if we combine the best ideas from the Social Web and Semantic Web? The Social Web is an ecosystem of participation, where value is created by the aggregation of many individual user contributions. The Semantic Web is an ecosystem of data, where value is created by the integration of structured data from many sources. What applications can best synthesize the strengths of these two approaches, to create a new level of value that is both rich with human participation and powered by wellstructured information? This paper proposes a class of applications called collective knowledge systems, which unlock the "collective intelligence" of the Social Web with knowledge representation and reasoning techniques of the Semantic Web. Thomas Gruber Thomas Gruber Thomas Gruber -365466351 Journal of Web Semantics Collective intelligence, human-machine systems, Collective Knowledge Systems, Snap-to-grid, Web 3.0, Learning from Semistructured DataTagCommons, RealTravel, structured and unstructured data, Collected Intelligence 1 Collective Knowledge Systems: Where the Social Web meets the Semantic Web 6 2008 http://test.websemanticsjournal.org/openacademia/papers/2007119/BridgingSemanticWebRESTBattleV6I1.pdf Semantic Web technologies must integrate with Web 2.0 services for both to leverage each others strengths. We argue that the REST-based design methodologies [1] of the web present the ideal mechanism through which to align the publication of semantic data with the existing web architecture. We present the design and implementation of two solutions that combine REST-based design and RDF [2] data access: one solution for integrating existing web services and one server-side solution for creating RDF REST services. Both of these solutions enable SPARQL [13] to be a unifying data access layer for aligning the Semantic Web and Web 2.0. Robert Battle, Edward Benson. Bridging the Semantic Web and Web 2.0 with Representational State Transfer (REST). Journal of Web Semantics 6(1), 2008 Semantic Web technologies must integrate with Web 2.0 services for both to leverage each others strengths. We argue that the REST-based design methodologies [1] of the web present the ideal mechanism through which to align the publication of semantic data with the existing web architecture. We present the design and implementation of two solutions that combine REST-based design and RDF [2] data access: one solution for integrating existing web services and one server-side solution for creating RDF REST services. Both of these solutions enable SPARQL [13] to be a unifying data access layer for aligning the Semantic Web and Web 2.0. Robert Battle Robert Battle Robert Battle 1209588262 Edward Benson Edward Benson Edward Benson -1097915812 Journal of Web Semantics Semantic Web, Web 2.0, Representational State Transfer;,Web Services 1 Bridging the Semantic Web and Web 2.0 with Representational State Transfer (REST) 6 2008 http://test.websemanticsjournal.org/openacademia/papers/20071025/WebAuthoringHarperV5I3.pdf Conventional thought from the SemanticWeb community equates the use of ontologies with the representation of the meaning of content. Here, we skew this viewpoint by describing our ontology,Web Authoring for Accessibility (WAfA), which investigates the way ontologies can describe the semantic structure of documents. By understanding the way heterogeneous XHTML (Extensible Hypertext Mark-up Language) documents are structured we can better transform documents, currently inaccessible to visually impaired users. WAfA performs two tasks: (1) it allows us to flexibly model an XHTML document within the context of navigation and orientation through the Web resource; (2) it enables non-expert users to quickly annotate a Web document by providing a ?lingua franca? between author and Web Accessibility Domain Experts. Here we describe our ontology, its use, novelty, and importance. Simon Harper, Yeliz Yesilada. Web Authoring for Accessibility (WAfA). Journal of Web Semantics 5(3), 2007 Conventional thought from the SemanticWeb community equates the use of ontologies with the representation of the meaning of content. Here, we skew this viewpoint by describing our ontology,Web Authoring for Accessibility (WAfA), which investigates the way ontologies can describe the semantic structure of documents. By understanding the way heterogeneous XHTML (Extensible Hypertext Mark-up Language) documents are structured we can better transform documents, currently inaccessible to visually impaired users. WAfA performs two tasks: (1) it allows us to flexibly model an XHTML document within the context of navigation and orientation through the Web resource; (2) it enables non-expert users to quickly annotate a Web document by providing a ?lingua franca? between author and Web Accessibility Domain Experts. Here we describe our ontology, its use, novelty, and importance. Simon Harper Simon Harper Simon Harper 1938534684 Yeliz Yesilada Yeliz Yesilada Yeliz Yesilada -103806831 Journal of Web Semantics Web accessibility, Ontologies, XHTML, Semantics of document structures 3 Web Authoring for Accessibility (WAfA) 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/VerifyingfeaturemodelsusingOWLWangV5I2.pdf Feature models are widely used in domain engineering to capture common and variant features among systems in a particular domain. However, the lack of a formal semantics and reasoning support of feature models has hindered the development of this area. Industrial experiences also show that methods and tools that can support feature model analysis are badly appreciated. Such reasoning tool should be fully automated and efficient. At the same time, the reasoning tool should scale up well since it may need to handle hundreds or even thousands of features a that modern software systems may have. This paper presents an approach to modeling and verifying feature diagrams using Semantic Web OWL ontologies. We use OWL DL ontologies to precisely capture the inter-relationships among the features in a feature diagram. OWL reasoning engines such as FaCT++ are deployed to check for the inconsistencies of feature configurations fully automatically. Furthermore, a general OWL debugger has been developed to tackle the disadvantage of lacking debugging aids for the current OWL reasoner and to complement our verification approach. We also developed a CASE tool to facilitate visual development, interchange and reasoning of feature diagrams in the SemanticWeb environment Hai H. Wang, Yuan Fang Li, Jing Sunc, Hongyu Zhang andJeff Pan. Verifying feature models using OWL. Journal of Web Semantics 5(2), 2007 Feature models are widely used in domain engineering to capture common and variant features among systems in a particular domain. However, the lack of a formal semantics and reasoning support of feature models has hindered the development of this area. Industrial experiences also show that methods and tools that can support feature model analysis are badly appreciated. Such reasoning tool should be fully automated and efficient. At the same time, the reasoning tool should scale up well since it may need to handle hundreds or even thousands of features a that modern software systems may have. This paper presents an approach to modeling and verifying feature diagrams using Semantic Web OWL ontologies. We use OWL DL ontologies to precisely capture the inter-relationships among the features in a feature diagram. OWL reasoning engines such as FaCT++ are deployed to check for the inconsistencies of feature configurations fully automatically. Furthermore, a general OWL debugger has been developed to tackle the disadvantage of lacking debugging aids for the current OWL reasoner and to complement our verification approach. We also developed a CASE tool to facilitate visual development, interchange and reasoning of feature diagrams in the SemanticWeb environment Hai H. Wang Hai H. Wang Hai H. Wang -397544040 Yuan Fang Li Yuan Fang Li Yuan Fang Li -443401791 Jing Sunc Jing Sunc Jing Sunc 1673040079 Hongyu Zhang andJeff Pan Hongyu Zhang andJeff Pan Hongyu Zhang andJeff Pan 657014409 Journal of Web Semantics Semantic Web, OWL, Ontologies, Feature modeling 2 Verifying feature models using OWL 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/VariablestrengthconditionalpreferencesforrankingobjectsinOntologiesLukasiewiczV5I3.pdf We introduce conditional preference bases as a means for ranking objects in ontologies. Conditional preference bases consist of a description logic knowledge base and a finite set of conditional preferences, which are statements of the form ?generally, in the context &#966;, property &#945; is preferred over property ?#945; with strength s?. They are inspired by variable-strength defaults in conditional knowledge bases. We define the notion of consistency for conditional preference bases, and we show how consistent conditional preference bases can be used for ranking objects in ontologies, where every object represents essentially a set of individuals that are sharing the same ranking-relevant properties. More concretely, we define two object rankings, denoted &#954;sum and &#954;lex, which evaluate the strengths of conditional preferences in an additive and a lexicographic way, respectively. Furthermore, we provide algorithms for the main computational tasks for ranking objects under conditional preference bases, we analyze the complexity of these tasks, and we delineate a tractable special case. To give evidence of the usefulness of this approach in practice, we describe two applications in the areas of product and literature search, where it allows especially for a flexible user-defined ranking of the query results reflecting personal preferences. Thomas Lukasiewicz, Jorg Schellhase. Variable-strength conditional preferences for ranking objects in ontologies. Journal of Web Semantics 5(3), 2007 We introduce conditional preference bases as a means for ranking objects in ontologies. Conditional preference bases consist of a description logic knowledge base and a finite set of conditional preferences, which are statements of the form ?generally, in the context &#966;, property &#945; is preferred over property ?#945; with strength s?. They are inspired by variable-strength defaults in conditional knowledge bases. We define the notion of consistency for conditional preference bases, and we show how consistent conditional preference bases can be used for ranking objects in ontologies, where every object represents essentially a set of individuals that are sharing the same ranking-relevant properties. More concretely, we define two object rankings, denoted &#954;sum and &#954;lex, which evaluate the strengths of conditional preferences in an additive and a lexicographic way, respectively. Furthermore, we provide algorithms for the main computational tasks for ranking objects under conditional preference bases, we analyze the complexity of these tasks, and we delineate a tractable special case. To give evidence of the usefulness of this approach in practice, we describe two applications in the areas of product and literature search, where it allows especially for a flexible user-defined ranking of the query results reflecting personal preferences. Thomas Lukasiewicz Thomas Lukasiewicz Thomas Lukasiewicz 1798305901 Jorg Schellhase Jorg Schellhase Jorg Schellhase 1385756430 Journal of Web Semantics Variable-strength conditional preference, Ranking, Ontology, Description logic, Semantic Web, Literature search, Algorithms and complexity 3 Variable-strength conditional preferences for ranking objects in ontologies 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/UnderstandingontologyevolutionPlessersV5I1pdf.pdf In this article, we propose a change detection approach in the context of an ontology evolution framework forOWLDL ontologies. The framework allows ontology engineers to request and apply changes to the ontology they manage. Furthermore, the framework assures that the ontology and its depending artifacts remain consistent after changes have been applied. Innovative is that the framework includes a change detection mechanism that allows generating automatically a detailed overview of changes that have occurred based on a set of change definitions. In addition, different users (such as maintainers of depending artifacts) may have their own set of change definitions, which results into different overviews of the changes, each providing a different view on how the ontology has been changed. Using these change definitions, also different levels of abstraction are supported. Both features will enhance the understanding of the evolution of an ontology for different users. Peter Plessers, Olga De Troyer, Sven Casteleyn. Understanding ontology evolution: A change detection approach. Journal of Web Semantics 5(1), 2007 In this article, we propose a change detection approach in the context of an ontology evolution framework forOWLDL ontologies. The framework allows ontology engineers to request and apply changes to the ontology they manage. Furthermore, the framework assures that the ontology and its depending artifacts remain consistent after changes have been applied. Innovative is that the framework includes a change detection mechanism that allows generating automatically a detailed overview of changes that have occurred based on a set of change definitions. In addition, different users (such as maintainers of depending artifacts) may have their own set of change definitions, which results into different overviews of the changes, each providing a different view on how the ontology has been changed. Using these change definitions, also different levels of abstraction are supported. Both features will enhance the understanding of the evolution of an ontology for different users. Peter Plessers Peter Plessers Peter Plessers 79701407 Olga De Troyer Olga De Troyer Olga De Troyer -1477623718 Sven Casteleyn Sven Casteleyn Sven Casteleyn -298379216 Journal of Web Semantics Ontology evolution, Change management, Semantic Web 1 Understanding ontology evolution: A change detection approach 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/TowardssemanticallyenhancedwebsvcrepositoriesV5I2.pdf The success of theWeb services technology has brought topics as software reuse and discovery once again on the agenda of software engineers. While there are several efforts towards automating Web service discovery and composition, many developers still search for services via online Web service repositories and then combine them manually. However, from our analysis of these online repositories, it yields that, unlike traditional software libraries, they rely on little metadata to support service discovery.We believe that the major cause is the difficulty of automatically deriving metadata that would describe rapidly changing Web service collections. In this paper, we discuss the major shortcomings of state of the art Web service repositories and as a solution, we report on ongoing work and ideas on how to use techniques developed in the context of the Semantic Web (ontology learning, matching, metadata based presentation) to improve the current situation. Marta Sabou, Jeff Pan. Towards semantically enhanced Web service repositories. Journal of Web Semantics 5(2), 2007 The success of theWeb services technology has brought topics as software reuse and discovery once again on the agenda of software engineers. While there are several efforts towards automating Web service discovery and composition, many developers still search for services via online Web service repositories and then combine them manually. However, from our analysis of these online repositories, it yields that, unlike traditional software libraries, they rely on little metadata to support service discovery.We believe that the major cause is the difficulty of automatically deriving metadata that would describe rapidly changing Web service collections. In this paper, we discuss the major shortcomings of state of the art Web service repositories and as a solution, we report on ongoing work and ideas on how to use techniques developed in the context of the Semantic Web (ontology learning, matching, metadata based presentation) to improve the current situation. Sabou, Marta Marta Sabou Marta Sabou Marta Sabou -170331968 Jeff Pan Jeff Pan Jeff Pan 984603368 Journal of Web Semantics Web services repositories; Semantic Web; Ontology learning, Ontology mapping, Reasoning, Metadata presentation 2 Towards semantically enhanced Web service repositories 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/TowardsContentTrustofWebResourcesV5I4.pdf Yolanda Gil, Donovan Artz. Towards Content Trust of Web Resources. Journal of Web Semantics 5(4), 2007 Yolanda Gil, Donovan Artz. Towards Content Trust of Web Resources. Journal of Web Semantics 5(4), 2007 Gil, Yolanda Yolanda Gil Yolanda Gil Yolanda Gil -1203085696 Donovan Artz Donovan Artz Donovan Artz 616018798 Journal of Web Semantics web resources 4 Towards Content Trust of Web Resources 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/TowardsawebofPatternsDietrichV5I2.pdf Design patterns have been used successfully in recent years in the software engineering community in order to share knowledge about the structural and behavioural properties of software. There is a growing body of research in the area of design pattern detection and design recovery, requiring a formal description of patterns which can be matched by tools against the software that is to be analysed. We propose a novel approach to the formal definition of design patterns that is based on the idea that design patterns are knowledge that is shared across a community and that is by nature distributed and inconsistent. By using the web ontology language (OWL) we are able to formally define design patterns and some related concepts such as pattern participant, pattern refinement, and pattern instance.We discuss the respective ontology and give examples of how patterns can be defined using this ontology.We present the prototype of a Java client that accesses the pattern definitions and detects patterns in Java software, and analyse some scan results. This leads to the discussion on design pattern instantiation. Jens Dietrich, Chris Elgar. Towards a web of patterns. Journal of Web Semantics 5(2), 2007 Design patterns have been used successfully in recent years in the software engineering community in order to share knowledge about the structural and behavioural properties of software. There is a growing body of research in the area of design pattern detection and design recovery, requiring a formal description of patterns which can be matched by tools against the software that is to be analysed. We propose a novel approach to the formal definition of design patterns that is based on the idea that design patterns are knowledge that is shared across a community and that is by nature distributed and inconsistent. By using the web ontology language (OWL) we are able to formally define design patterns and some related concepts such as pattern participant, pattern refinement, and pattern instance.We discuss the respective ontology and give examples of how patterns can be defined using this ontology.We present the prototype of a Java client that accesses the pattern definitions and detects patterns in Java software, and analyse some scan results. This leads to the discussion on design pattern instantiation. Jens Dietrich Jens Dietrich Jens Dietrich 1976384512 Chris Elgar Chris Elgar Chris Elgar 1897580922 Journal of Web Semantics Semantic web, Software design patterns, Collaborative software engineering 2 Towards a web of patterns 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/SwetoDblpMezaV5I3.pdf SwetoDblp is a large populated ontology with a shallow schema yet a large number of real-world instance data.We describe how such ontology is built from an XML source and how it can be maintained. Instead of a one-to-one mapping from XML to RDF, the creation of the ontology emphasizes the addition of relationships and the value of URIs. SwetoDblp is publicly available online. We also summarize research efforts that have used or are using this freely available community resource. Boanerges Aleman-Meza, Farshad Hakimpour, Budak Arpinar, Amit P. Sheth. SwetoDblp ontology of Computer Science publications. Journal of Web Semantics 5(3), 2007 SwetoDblp is a large populated ontology with a shallow schema yet a large number of real-world instance data.We describe how such ontology is built from an XML source and how it can be maintained. Instead of a one-to-one mapping from XML to RDF, the creation of the ontology emphasizes the addition of relationships and the value of URIs. SwetoDblp is publicly available online. We also summarize research efforts that have used or are using this freely available community resource. Boanerges Aleman-Meza Boanerges Aleman-Meza Boanerges Aleman-Meza -24594996 Farshad Hakimpour Farshad Hakimpour Farshad Hakimpour -134249165 Budak Arpinar Budak Arpinar Budak Arpinar -649689822 Sheth, Amit Amit P. Sheth Amit P. Sheth Amit P. Sheth -2094016931 Journal of Web Semantics Ontology, Semantic analytics, RDF, XML, Ontology population 3 SwetoDblp ontology of Computer Science publications 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/SurveyofTrustArtzV5I2.pdf Trust is an integral component in many kinds of human interaction, allowing people to act under uncertainty and with the risk of negative consequences. For example, exchanging money for a service, giving access to your property, and choosing between conflicting sources of information all may utilize some form of trust. In computer science, trust is a widely used term whose definition differs among researchers and application areas. Trust is an essential component of the vision for the SemanticWeb, where both new problems and new applications of trust are being studied. This paper gives an overview of existing trust research in computer science and the Semantic Web. Yolanda Gil, Donovan Artz. A survey of trust in computer science and the Semantic Web. Journal of Web Semantics 5(2), 2007 Trust is an integral component in many kinds of human interaction, allowing people to act under uncertainty and with the risk of negative consequences. For example, exchanging money for a service, giving access to your property, and choosing between conflicting sources of information all may utilize some form of trust. In computer science, trust is a widely used term whose definition differs among researchers and application areas. Trust is an essential component of the vision for the SemanticWeb, where both new problems and new applications of trust are being studied. This paper gives an overview of existing trust research in computer science and the Semantic Web. Gil, Yolanda Yolanda Gil Yolanda Gil Yolanda Gil -1203085696 Donovan Artz Donovan Artz Donovan Artz 616018798 Journal of Web Semantics Trust, Web of trust, Policies, Reputation 2 A survey of trust in computer science and the Semantic Web 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/SemanticWikiKrotzschV5I4.pdf Wikipedia is the world?s largest collaboratively edited source of encyclopaedic knowledge. But in spite of its utility, its content is barely machine-interpretable and only weakly structured. With Semantic MediaWiki we provide an extension that enables wiki-users to semantically annotate wiki pages, based on which the wiki contents can be browsed, searched, and reused in novel ways. In this paper, we give an extended overview of Semantic MediaWiki and discuss experiences regarding performance and current applications Markus Krotzsch, Denny Vrandecic, Max Volkel, Heiko Haller, Rudi Studer. SemanticWikipedia. Journal of Web Semantics 5(4), 2007 Wikipedia is the world?s largest collaboratively edited source of encyclopaedic knowledge. But in spite of its utility, its content is barely machine-interpretable and only weakly structured. With Semantic MediaWiki we provide an extension that enables wiki-users to semantically annotate wiki pages, based on which the wiki contents can be browsed, searched, and reused in novel ways. In this paper, we give an extended overview of Semantic MediaWiki and discuss experiences regarding performance and current applications Markus Krotzsch Markus Krotzsch Markus Krotzsch -1940741041 Denny Vrandecic Denny Vrandecic Denny Vrandecic 693503293 Max Volkel Max Volkel Max Volkel -592494231 Heiko Haller Heiko Haller Heiko Haller 285060644 Studer, Rudi Rudi Studer Rudi Studer Rudi Studer 1421361214 Journal of Web Semantics Semantic Web, Wikis, Wikipedia, Collaborative content editing 4 SemanticWikipedia 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/ProvenancebasedvalidationofescienceexperimentsMilesV5I1.pdf E-science experiments typically involve many distributed services maintained by different organisations. After an experiment has been executed, it is useful for a scientist to verify that the execution was performed correctly or is compatible with some existing experimental criteria or standards, not necessarily anticipated prior to execution. Scientists may also want to review and verify experiments performed by their colleagues. There are no existing frameworks for validating such experiments in today?s e-science systems. Users therefore have to rely on error checking performed by the services, or adopt other ad hoc methods. This paper introduces a platform-independent framework for validating workflow executions. The validation relies on reasoning over the documented provenance of experiment results and semantic descriptions of services advertised in a registry. This validation process ensures experiments are performed correctly, and thus results generated are meaningful. The framework is tested in a bioinformatics application that performs protein compressibility analysis. Simon Miles, Sylvia C. Wong, Weijian Fang, Paul Groth, Klaus-Peter Zauner, Luc Moreau. Provenance-based validation of e-science experiments. Journal of Web Semantics 5(1), 2007 E-science experiments typically involve many distributed services maintained by different organisations. After an experiment has been executed, it is useful for a scientist to verify that the execution was performed correctly or is compatible with some existing experimental criteria or standards, not necessarily anticipated prior to execution. Scientists may also want to review and verify experiments performed by their colleagues. There are no existing frameworks for validating such experiments in today?s e-science systems. Users therefore have to rely on error checking performed by the services, or adopt other ad hoc methods. This paper introduces a platform-independent framework for validating workflow executions. The validation relies on reasoning over the documented provenance of experiment results and semantic descriptions of services advertised in a registry. This validation process ensures experiments are performed correctly, and thus results generated are meaningful. The framework is tested in a bioinformatics application that performs protein compressibility analysis. Simon Miles Simon Miles Simon Miles 898667206 Sylvia C. Wong Sylvia C. Wong Sylvia C. Wong -1562931819 Weijian Fang Weijian Fang Weijian Fang -188392645 Paul Groth Paul Groth Paul Groth 166439216 Klaus-Peter Zauner Klaus-Peter Zauner Klaus-Peter Zauner -893147010 Luc Moreau Luc Moreau Luc Moreau -387132483 Journal of Web Semantics Provenance, E-science, Process validation, Semantic service description 1 Provenance-based validation of e-science experiments 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/PolyphonetMatsuoV5I4.pdf Yutaka Matsuo, Junichiro Mori andMasahiro Hamasaki, Takuichi Nishimura, Hideaki Takeda, Koiti Hasida, Mitsuru Ishizuka. POLYPHONET: An Advanced Social Network Extraction System from the Web. Journal of Web Semantics 5(4), 2007 Yutaka Matsuo, Junichiro Mori andMasahiro Hamasaki, Takuichi Nishimura, Hideaki Takeda, Koiti Hasida, Mitsuru Ishizuka. POLYPHONET: An Advanced Social Network Extraction System from the Web. Journal of Web Semantics 5(4), 2007 Yutaka Matsuo Yutaka Matsuo Yutaka Matsuo -235494498 Junichiro Mori andMasahiro Hamasaki Junichiro Mori andMasahiro Hamasaki Junichiro Mori andMasahiro Hamasaki 2010538516 Takuichi Nishimura Takuichi Nishimura Takuichi Nishimura 678658482 Hideaki Takeda Hideaki Takeda Hideaki Takeda -2133428523 Koiti Hasida Koiti Hasida Koiti Hasida -1071278400 Mitsuru Ishizuka Mitsuru Ishizuka Mitsuru Ishizuka -1842420275 Journal of Web Semantics Social network, search engine 4 POLYPHONET: An Advanced Social Network Extraction System from the Web 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/PiggyBankHuynhV5I1.pdf The SemanticWeb Initiative envisions aWeb wherein information is offered free of presentation, allowing more effective exchange and mixing across web sites and across web pages. But without substantial SemanticWeb content, few tools will be written to consume it; without many such tools, there is little appeal to publish Semantic Web content. To break this chicken-and-egg problem, thus enabling more flexible information access, we have created a web browser extension called Piggy Bank that lets users make use of Semantic Web content within Web content as users browse the Web. Wherever Semantic Web content is not available, Piggy Bank can invoke screenscrapers to re-structure information within web pages into Semantic Web format. Through the use of Semantic Web technologies, Piggy Bank provides direct, immediate benefits to users in their use of the existing Web. Thus, the existence of even just a few Semantic Web-enabled sites or a few scrapers already benefits users. Piggy Bank thereby offers an easy, incremental upgrade path to users without requiring a wholesale adoption of the Semantic Web?s vision. To further improve this Semantic Web experience, we have created Semantic Bank, a web server application that lets Piggy Bank users share the Semantic Web information they have collected, enabling collaborative efforts to build sophisticated Semantic Web information repositories through simple, everyday?s use of Piggy Bank. David Huynha, Stefano Mazzocchi, David Karger. Piggy Bank: Experience the Semantic Web inside your web browser. Journal of Web Semantics 5(1), 2007 The SemanticWeb Initiative envisions aWeb wherein information is offered free of presentation, allowing more effective exchange and mixing across web sites and across web pages. But without substantial SemanticWeb content, few tools will be written to consume it; without many such tools, there is little appeal to publish Semantic Web content. To break this chicken-and-egg problem, thus enabling more flexible information access, we have created a web browser extension called Piggy Bank that lets users make use of Semantic Web content within Web content as users browse the Web. Wherever Semantic Web content is not available, Piggy Bank can invoke screenscrapers to re-structure information within web pages into Semantic Web format. Through the use of Semantic Web technologies, Piggy Bank provides direct, immediate benefits to users in their use of the existing Web. Thus, the existence of even just a few Semantic Web-enabled sites or a few scrapers already benefits users. Piggy Bank thereby offers an easy, incremental upgrade path to users without requiring a wholesale adoption of the Semantic Web?s vision. To further improve this Semantic Web experience, we have created Semantic Bank, a web server application that lets Piggy Bank users share the Semantic Web information they have collected, enabling collaborative efforts to build sophisticated Semantic Web information repositories through simple, everyday?s use of Piggy Bank. David Huynha David Huynha David Huynha 1749616469 Stefano Mazzocchi Stefano Mazzocchi Stefano Mazzocchi 641443054 Karger, David R. David Karger David R. Karger David R. Karger 1828799453 Journal of Web Semantics Semantic Web, Screen scraping, Browsing, Sharing, Tagging, Annotation, Collaboration 1 Piggy Bank: Experience the Semantic Web inside your web browser 5 2007 http://test.websemanticsjournal.org/openacademia/papers/20071025/PelletSirinV5I2.pdf In this paper, we present a brief overview of Pellet: a complete OWL-DL reasoner with acceptable to very good performance, extensive middleware, and a number of unique features. Pellet is the first sound and complete OWL-DL reasoner with extensive support for reasoning with individuals (including nominal support and conjunctive query), user-defined datatypes, and debugging support for ontologies. It implements several extensions to OWL-DL including a combination formalism for OWL-DL ontologies, a non-monotonic operator, and preliminary support for OWL/Rule hybrid reasoning. Pellet is written in Java and is open source. Evren Sirin, Bijan Parsia, Bernardo Cuenca Grau, Aditya Kalyanpur, Yarden Katz. Pellet: A practical OWL-DL reasoner. Journal of Web Semantics 5(2), 2007 In this paper, we present a brief overview of Pellet: a complete OWL-DL reasoner with acceptable to very good performance, extensive middleware, and a number of unique features. Pellet is the first sound and complete OWL-DL reasoner with extensive support for reasoning with individuals (including nominal support and conjunctive query), user-defined datatypes, and debugging support for ontologies. It implements several extensions to OWL-DL including a combination formalism for OWL-DL ontologies, a non-monotonic operator, and preliminary support for OWL/Rule hybrid reasoning. Pellet is written in Java and is open source. Sirin, Evren Evren Sirin</