BibSonomyburst/user/eswc2008/semanticBibSonomy RSS feed for /user/eswc2008/semantic2012-02-16T18:55:50+01:00http://www.bibsonomy.org/bibtex/26b1ee8e572600c6d2efc47c9f58817ee/eswc2008eswc20082008-05-28T14:50:07+02:00integration semantic uddi universal web sawsdl discovery annotations language description owl service services ontology wsdl semantic-web-services-1 <span class="authorEditorList"><a href="/author/Kourtesis">Dimitrios Kourtesis</a>, and <a href="/author/Paraskakis">Iraklis Paraskakis</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:07 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSCombining SAWSDL, OWL-DL and UDDI for Semantically Enhanced Web Service Discovery2008integration semantic uddi universal web sawsdl discovery annotations language description owl service services ontology wsdl semantic-web-services-1 UDDI registries are included as a standard offering within the product suite of any major SOA vendor, serving as the foundation for establishing design-time and run-time SOA governance. Despite the success of the UDDI specification and its rapid uptake by the industry, the capabilities of its offered service discovery facilities are rather limited. The lack of machine-understandable semantics in the technical specifications and classification schemes used for retrieving services, prevent UDDI registries from supporting fully automated and thus truly effective service discovery. This paper presents the implementation of a semantically-enhanced registry that builds on the UDDI specification and augments its service publication and discovery facilities to overcome the aforementioned limitations. The proposed solution combines the use of SAWSDL for creating semantically annotated descriptions of service interfaces and the use of OWL-DL for modelling service capabilities and for performing matchmaking via DL reasoning.http://www.bibsonomy.org/bibtex/2771947296490ffa6cd01ada59cb6c1ec/eswc2008eswc20082008-05-28T14:50:06+02:00ontology end-to-end cultural retrieval evaluation semantic alignment heritage methods distance ontology-alignment <span class="authorEditorList"><a href="/author/Hollink">Laura Hollink</a>, <a href="/author/van Assem">Mark van Assem</a>, <a href="/author/Isaac">Antoine Isaac</a>, <a href="/author/Wang">Shenghui Wang</a>, and <a href="/author/Schreiber">Guus Schreiber</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:06 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSTwo Variations on Ontology Alignment Evaluation: Methodological Issues2008ontology end-to-end cultural retrieval evaluation semantic alignment heritage methods distance ontology-alignment Evaluation of ontology alignments is in practice done in two ways: (1) assessing individual correspondences and (2) comparing the alignment to a reference alignment. However, this type of evaluation does not guarantee that an application which uses the alignment will perform well. In this paper, we contribute to the current ontology alignment evaluation practices by proposing two alternative evaluation methods that take into account some characteristics of a usage scenario without doing a full-fledged end-to-end evaluation. We compare different evaluation approaches in three case studies, focussing on methodological issues. Each case study considers an alignment between a different pair of ontologies, ranging from rich and well-structured to small and poorly structured. This enables us to conclude on the use of different evaluation approaches in different settings.http://www.bibsonomy.org/bibtex/20702addea22ce6b1b90eccffef1b9397/eswc2008eswc20082008-05-28T14:50:05+02:00email social act speech workflow information desktop semantic management theory personal patterns applications-1 <span class="authorEditorList"><a href="/author/Scerri">Simon Scerri</a>, <a href="/author/Handschuh">Siegfried Handschuh</a>, and <a href="/author/Decker">Stefan Decker</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:05 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSSemantic Email as a communication medium for the Social Semantic Desktop2008email social act speech workflow information desktop semantic management theory personal patterns applications-1 In this paper, we introduce a formal email workflow model based on traditional email, which enables the user to define and execute ad-hoc workflows in an intuitive way. This model paves the way for semantic annotation of implicit, well-defined workflows, thus making them explicit and exposing the missing information in a machine processable way. Grounding this work within the Social Semantic Desktop [1] via appropriate ontologies means that this information can be exploited for the benefit of the user. This will have a direct impact on their personal information management - given email is not just a major channel of data exchange between desktops, but it also serves as a virtual working environment where people collaborate. Thus the presented workflow model will have a concrete manifestation in the creation, organization and exchange of semantic desktop data.http://www.bibsonomy.org/bibtex/27d5bef571852a9d6c49d409d25ba7f5f/eswc2008eswc20082008-05-28T14:50:03+02:00web semantic ontology services service wsmo-lite modelling <span class="authorEditorList"><a href="/author/Vitvar">Tomas Vitvar</a>, <a href="/author/Kopecky">Jacek Kopecky</a>, <a href="/author/Viskova">Jana Viskova</a>, and <a href="/author/Fensel">Dieter Fensel</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:03 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSWSMO-Lite Annotations for Web Services2008web semantic ontology services service wsmo-lite modelling Current efforts in Semantic Web Services do not sufficiently address the industrial developments of SOA technology in regards to bottom-up modeling of services, that is, building incremental layers on top of existing service descriptions. An important step in this direction has been made in the W3C by the SAWSDL WG proposing a framework for annotating WSDL services with arbitrary semantic descriptions. We build on the SAWSDL layer and define WSMO-Lite service ontology, narrowing down the use of SAWSDL as an annotation mechanism for WSMO-Lite. Ultimately, our goal is to allow incremental steps on top of existing service descriptions, enhancing existing SOA capabilities with intelligent and automated integration.http://www.bibsonomy.org/bibtex/22f250404994a287160f00ef1e8a631ac/eswc2008eswc20082008-05-28T14:50:02+02:00clustering drift conceptual similarity semantic concept setection novelty learning <span class="authorEditorList"><a href="/author/Fanizzi">Nicola Fanizzi</a>, <a href="/author/d&#039;Amato">Claudia d&#039;Amato</a>, and <a href="/author/Esposito">Floriana Esposito</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:02 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSConceptual Clustering and its Application to Concept Drift and Novelty Detection2008clustering drift conceptual similarity semantic concept setection novelty learning We present a method based on clustering techniques to detect concept drift or novelty in a knowledge based expressed in Description Logics. The method exploits an effective and language-independent semi-distance measure defined for the space of individuals, that is based on a finite number of dimensions corresponding to a committee of discriminating features (represented by concept descriptions). A maximally discriminating group of features can be obtained with the randomized optimization methods described in the paper. An experimentation with some ontologies proves the feasibility of our method and its effectiveness in terms of clustering validity indices. Then, with a supervised learning phase, each cluster can be assigned with a refined or newly constructed intensional definition expressed in the adopted language. We propose a method for exploiting the clustering results for concept drift and novelty detectionhttp://www.bibsonomy.org/bibtex/2d972de0a0bd5ae9067c390046fc34c7d/eswc2008eswc20082008-05-28T14:50:02+02:00query interpretation interoperability semantic vectors expansion query-processing-2 <span class="authorEditorList"><a href="/author/Ventresque">Anthony Ventresque</a>, <a href="/author/Cazalens">Sylvie Cazalens</a>, <a href="/author/Lamarre">Philippe Lamarre</a>, and <a href="/author/Valduriez">Patrick Valduriez</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:02 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSImproving interoperability using query interpretation in semantic vector spaces2008query interpretation interoperability semantic vectors expansion query-processing-2 In semantic web applications where query initiators and information providers do not necessarily share the same ontology, semantic interoperability typically relies on ontology matching or schema mappings. Information exchange is then not only enabled by the established correspondences (the ``shared'' parts of the ontologies) but, in some sense, limited to them. Then, an important question which has not received attention is how the ``unshared'' parts can also contribute to and improve information exchange. In this paper, we address this question by considering a system where documents and queries are represented by semantic vectors. We propose a specific query expansion step at the query initiator's side and a query interpretation step at the document provider's. Through these steps, unshared concepts contribute to evaluate the relevance of documents wrt. a given query. Our experiments show an important improvement of retrieval relevance when concepts of documents and queries are not shared. Even if the concepts of the initial query are not shared by the document provider, our method still ensures 90% of the precision and recall obtained when the concepts are shared.http://www.bibsonomy.org/bibtex/2fc7f36c61174d07ed9bdb4608c250284/eswc2008eswc20082008-05-28T14:50:00+02:00processing data mediator integration distributed sparql query semantic web query-processing-2 <span class="authorEditorList"><a href="/author/Langegger">Andreas Langegger</a>, <a href="/author/Wöß">Wolfram Wöß</a>, and <a href="/author/Blöchl">Martin Blöchl</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:00 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSA Semantic Web Middleware for Virtual Data Integration on the Web2008processing data mediator integration distributed sparql query semantic web query-processing-2 In this contribution a system is presented, which provides access to distributed data sources using Semantic Web technology. While it was primarily designed for data sharing and scientific collaboration, it is regarded as a base technology useful for many other Semantic Web applications. The proposed system allows to retrieve data using SPARQL queries, data sources can register and abandon freely, and all RDF Schema or OWL vocabularies can be used to describe their data, as long as they are accessible on the Web. Data heterogeneity is addressed by RDF-wrappers like D2R-Server placed on top of local information systems. A query does not directly refer to actual endpoints, instead it contains graph patterns adhering to a virtual data set. A mediator finally pulls and joins RDF data from different endpoints providing a transparent on-the-fly view to the end-user. The SPARQL protocol has been defined to enable systematic data access to remote endpoints. However, remote SPARQL queries require the explicit notion of endpoint URIs. The presented system allows users to execute queries without the need to specify target endpoints. Additionally, it is possible to execute join and union operations across different remote endpoints. The optimization of such distributed operations is a key factor concerning the performance of the overall system. Therefore, proven concepts from database research can be applied.http://www.bibsonomy.org/bibtex/2e18420bd48a40bb0cf79265cb071c2b6/eswc2008eswc20082008-05-28T14:50:00+02:00contracting web services wsmo semantic choreography service semantic-web-services-2 <span class="authorEditorList"><a href="/author/Roman">Dumitru Roman</a>, <a href="/author/Kifer">Michael Kifer</a>, and <a href="/author/Fensel">Dieter Fensel</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:00 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSWSMO Choreography: From Abstract State Machines to Concurrent Transaction Logic2008contracting web services wsmo semantic choreography service semantic-web-services-2 Several approaches to semantic Web services, including OWL-S, SWSF, and WSMO, have been proposed in the literature with the aim to enable automation of various tasks related to Web services, such as discovery, contracting, enactment, monitoring, and mediation. The ability to specify processes and to reason about them is central to these initiatives. In this paper we analyze the WSMO choreography model, which is based on Abstract State Machines (ASMs), and propose a methodology for generating WSMO choreography from visual specifications. We point out the limitations of the current WSMO model and propose a faithful extension that is based on Concurrent Transaction Logic (CTR). The advantage of a CTR-based model is that it uniformly captures a number of aspects that previously required separate mechanisms or were not captured at all. These include process specification, contracting for services, service enactment, and reasoning.http://www.bibsonomy.org/bibtex/27e0e8278793cb68e516ee4a564445bd9/eswc2008eswc20082008-05-28T14:50:00+02:00semantic claim linked open authoring web federation data applications-1 <span class="authorEditorList"><a href="/author/Groza">Tudor Groza</a>, <a href="/author/Handschuh">Siegfried Handschuh</a>, <a href="/author/Möller">Knud Möller</a>, and <a href="/author/Decker">Stefan Decker</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:00 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSKonneX-SALT: First Steps towards a Semantic Claim Federation Infrastructure2008semantic claim linked open authoring web federation data applications-1 Dissemination, an important phase of scientific research, can be seen as a communication process between scientists. They expose and support their findings, while discussing claims stated in related scientific publications. However, due to the increasing number of publications, finding a starting point for such a discussion represents a real challenge. At same time, browsing can also be difficult since the communication spans across multiple publications on the open web. In this paper we propose a semantic claim federation infrastructure, named KonneX-SALT, as a solution for both issues mentioned above: (i) finding claims in scientific publications, and (ii) building the argumentation discourse network (ADN) for each claim and providing support for browsing it (in our case, by making use of transclusion). In addition, we join the web of "linked open data", by linking the metadata managed by KonneX-SALT with some of the known repositories of scientific publications.http://www.bibsonomy.org/bibtex/2e89c1407d23363623b309b221e2ca1e9/eswc2008eswc20082008-05-28T14:50:00+02:00document semantic search spreading desktop activation retrieval <span class="authorEditorList"><a href="/author/Schumacher">Kinga Schumacher</a>, <a href="/author/Sintek">Michael Sintek</a>, and <a href="/author/Sauermann">Leo Sauermann</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:50:00 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSCombining Meta Data and Document Search with Spreading Activation for Semantic Desktop Search2008document semantic search spreading desktop activation retrieval The Semantic Desktop is a means to support users in Personal Information Management (PIM). It provides an excellent test bed for Semantic Web technology: resources (e. g., persons, projects, messages, documents) are distributed amongst multiple systems, ontologies are used to link and annotate them. Finding information is a core element in PIM. For the end user, the search interface has to be intuitive to use, natural language queries provide a simple mean to express requests. State of the art semantic search engines focus on metadata search or on semantic document retrieval. We combine both approaches to search the Semantic Desktop exploiting all available information, where we build on semantic teleporting and spreading activation. This combination is able to answer queries with instances, subgraphs of the knowledge base, and with relevant documents. We evaluated our approach on ESWC 2007 data in comparison with Google site search.http://www.bibsonomy.org/bibtex/25f00b25ff7b08fd1ddf4b7198ad5933d/eswc2008eswc20082008-05-28T14:49:59+02:00conceptual services web wsmo semantic spaces semantic-web-services-1 <span class="authorEditorList"><a href="/author/Dietze">Stefan Dietze</a>, <a href="/author/Gugliotta">Alessio Gugliotta</a>, and <a href="/author/Domingue">John Domingue</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:49:59 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSConceptual Situation Spaces for Semantic Situation-Driven Processes2008conceptual services web wsmo semantic spaces semantic-web-services-1 Context-awareness is a highly desired feature across several application domains. Semantic Web Services (SWS) technologies address context-adaptation by enabling the automatic discovery of distributed Web services for a given task based on comprehensive semantic representations. Whereas SWS technology supports the allocation of resources based on semantics, it does not entail the discovery of appropriate SWS representations for a given situation. Describing the complex notion of a situation in all its facets through symbolic SWS representation facilities is a costly task which may never lead to semantic completeness and introduces ambiguity issues. Moreover, even though not any real-world situation completely equals another, it has to be matched to a finite set of parameter descriptions within SWS representations to enable context-adaptability. To overcome these issues, we propose Conceptual Situation Spaces (CSS) to facilitate the description of situation characteristics as members in geometrical vector spaces following the idea of Conceptual Spaces. CSS enable fuzzy similarity-based matchmaking between real-world situation characteristics and predefined situation descriptions. Following our vision, the latter are part of semantic Situation-Driven Process (SDP) descriptions, which define a composition of SWS Goals suitable to support the course of an evolving situation. Particularly, we refer to the WSMO approach for SWS. Consequently, our approach extends the expressiveness of WSMO by enabling the automatic discovery, composition and execution of achievable goals for a given situation. To prove the feasibility, we apply our approach to the domain of eLearning and provide a proof-of-concept prototype.http://www.bibsonomy.org/bibtex/26e70f101963dbb1cc14244a34183031f/eswc2008eswc20082008-05-28T14:49:58+02:00exploratory interfaces management visualization ontology social personal semantic desktop user information pimo applications-1 <span class="authorEditorList"><a href="/author/Thai">VinhTuan Thai</a>, <a href="/author/Handschuh">Siegfried Handschuh</a>, and <a href="/author/Decker">Stefan Decker</a> </span><em>Proceedings of the 5th European Semantic Web Conference, </em><em>Berlin, Heidelberg, </em><em>Springer Verlag, </em>(<em>June 2008</em>)Wed May 28 14:49:58 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSIVEA: An Information Visualization Tool for Personalized Exploratory Document Collection Analysis2008exploratory interfaces management visualization ontology social personal semantic desktop user information pimo applications-1 Knowledge work in many fields requires examining several aspects of a collection of documents to attain meaningful understanding that is not explicitly available. Despite recent advances in document corpus visualization research, there is still a lack of principled approaches which enable the users to personalize the exploratory analysis process. In this paper, we present IVEA (Information Visualization for Exploratory Document Collection Analysis), an innovative visualization tool which employs the PIMO (Personal Information Model) ontology to provide the knowledge workers with an interactive interface allowing them to browse for information in a personalized manner. Not only does the tool allow the users to integrate their personal knowledge into the exploration and analysis of a document collection, it also enables them to incrementally enrich their PIMO ontologies with new entities matching their evolving interests in the process, benefiting the users not only in their future experience with IVEA but also with other PIMO-based applications. The usability of the tool was preliminarily evaluated and the results were sufficiently encouraging to make it worthwhile to conduct a larger-scale usability study.