BibSonomyburst/user/eswc2008/webBibSonomy RSS feed for /user/eswc2008/web2012-02-16T08:41:44+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/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/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/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/2ad4c19146cf99a09b1ba69d9256dfe62/eswc2008eswc20082008-05-28T14:49:58+02:00architecture software system engineering web semantic foundational-issues-storage-and-retrieval <span class="authorEditorList"><a href="/author/Gerber">Aurona Gerber</a>, <a href="/author/der Merwe">Alta Van der Merwe</a>, and <a href="/author/Barnard">Andries Barnard</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 ConferenceJuneLNCSThe usefulness of an abstracted Semantic Web architecture2008architecture software system engineering web semantic foundational-issues-storage-and-retrieval The establishment of the architecture of any information system is one of the crucial activities during the design and implementation thereof. There is general consensus in literature that an architecture (at least) depicts the structure of a system within a specific context. This depicted structure should portray the components that a system comprises of, as well as the relationships between the identified components. One of the main purposes of a system architecture is the provision of an agreed-upon functional description of system structure, components and component interactions. It is thus plausible to state that an architecture for the Semantic Web is crucial to its eventual realisation and that it is therefore necessary to attach undisputable meaning to the specification of the architecture for the languages of the Semantic Web. The most well-known versions of the layered architecture that exist within literature have been proposed by Berners-Lee, and the literature offers no description or specification of meaning for any of these. Furthermore, it is possible to indicate inconsistencies and discrepancies in the different versions of the architecture, leading to confusion, as well as conflicting proposals and adoptions by the Semantic Web community. In addition, none of the current formal initiatives by the W3C address the Semantic Web architecture specifically, which could be regarded as an omission. A layered architecture for the Semantic Web that adheres to Software Engineering principles and the fundamental aspects of layered architectures will assist in the development of Semantic Web specifications and applications. Furthermore, several of the current research and implementation issues associated with the implementation of the Semantic Web could potentially be resolved. A more recent version of a Semantic Web layered architecture, namely the CFL architecture, was proposed by Gerber, van der Merwe and Barnard [1]. They claim that their abstracted CFL architecture of the Semantic Web adheres to Software Engineering principles and addresses several of the concerns evident from previous versions of the architecture. In this paper we evaluate this recent architecture, both by scrutinising the shortcomings of previous architectures and evaluating the approach used for the development of the latest architecture. A similar approach was used in the construction of one of the most significant layered architectures in popular use today, notably the ISO/OSI reference model for network protocols. Furthermore, the CFL architecture is applied to usage scenarios to evaluate the usefulness thereof. We reach the conclusion that the approach indeed has merit in resolving current issues with regards to the architecture of the languages of the Semantic Web. However, the proposed version needs to be refined through consensus by all role players, including the W3C. Reference: [1] Gerber A.J., Van der Merwe A.J. and Barnard A., Towards a Semantic Web Layered Architecture. In Proceedings of the International Conference on Software Engineering (IASTED SE2007), Innsbruck, Austria, February 2007, pp.353-362.http://www.bibsonomy.org/bibtex/26065000208a26bb29e5eaeaff96fd035/eswc2008eswc20082008-05-28T14:49:58+02:00web games incentives online engineering semantic ontology user-interfaces-and-personalization <span class="authorEditorList"><a href="/author/Siorpaes">Katharina Siorpaes</a>, and <a href="/author/Hepp">Martin Hepp</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 ConferenceJuneLNCSOntoGame: Weaving the Semantic Web by Online Gaming2008web games incentives online engineering semantic ontology user-interfaces-and-personalization Most of the challenges faced when building the Semantic Web require a substantial amount of human labor and intelligence. Despite significant advancement in ontology learning and human language technology, building ontologies, annotating data, and establishing alignments between multiple ontologies remain tasks that highly depend on human intelligence, both as a source of domain expertise and for specifying the results. This means that individuals need to contribute time, and sometimes other resources. Now, we can observe a sharp contrast in user interest in two branches of Web activity: While the “Web 2.0” movement lives from an unprecedented amount of contributions from Web users, we witness a substantial lack of user involvement in the aforementioned tasks . We assume that one cause of the latter is a lack of proper incentive structures, i.e., settings in which the perceived benefits outweigh the efforts for people to contribute. As a novel solution, we (1) propose to masquerade the core tasks of weaving the Semantic Web behind on-line, multi-player game scenarios, in order to create proper incentives for humans to get involved. Doing so, we adopt the findings from the already famous “games with a purpose” by von Ahn, who has shown that presenting a useful task, which requires human intelligence, in the form of an on-line game can motivate a large amount of people to work heavily on this task, and this for free. Then, we (2) describe our OntoGame prototypes, (3) provide preliminary evidence that users are willing to invest a lot of time into those games, (4) show that the users’ input creates reliable results, and (5) discuss how, by doing so, they unknowingly weave the Semantic Web.http://www.bibsonomy.org/bibtex/254b3e29ce6a6f65fd0cd595a0904f919/eswc2008eswc20082008-05-28T14:49:57+02:00rdf semantic h-subsumption web entailment complexity formal-languages-2 <span class="authorEditorList"><a href="/author/Pichler">Reinhard Pichler</a>, <a href="/author/Polleres">Axel Polleres</a>, <a href="/author/Wei">Fang Wei</a>, and <a href="/author/Woltran">Stefan Woltran</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 14:49:57 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSEntailment for Domain-restricted RDF2008rdf semantic h-subsumption web entailment complexity formal-languages-2 We introduce domain-restricted RDF (dRDF) which allows to associate an RDF graph with a fixed, finite domain that interpretations for it may range over. We show that dRDF is a real extension of RDF and discuss impacts on the complexity of entailment in dRDF. The entailment problem represents the key reasoning task for RDF and is well known to be NP-complete. Remarkably, we show that the restriction of domains in dRDF raises the complexity of entailment from NP- to $\Pi^P_2$-completeness. In order to lower complexity of entailment for both domain-restricted and unrestricted graphs, we take a closer look at the graph structure. For cases where the structure of RDF graphs is restricted via the concept of bounded treewidth, we manage to prove tractability of entailment. We also present a polynomial entailment checking algorithm for such graphs.http://www.bibsonomy.org/bibtex/23e82aaa551afc06bde6aa5cb3b3bdcb3/eswc2008eswc20082008-05-28T14:49:56+02:00semantic htn web service composition planning semantic-web-services-2 <span class="authorEditorList"><a href="/author/Lin">Naiwen Lin</a>, <a href="/author/Kuter">Ugur Kuter</a>, and <a href="/author/Sirin">Evren Sirin</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 14:49:56 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSWeb Service Composition with User Preferences2008semantic htn web service composition planning semantic-web-services-2 In Web Service Composition (WSC) problems, the composition process generates a solution, i.e., a composition (or a plan) of atomic services, whose execution achieves some objectives on the Web. Existing research on Web service composition generally assumed that these objectives are absolute; i.e., the service-composition algorithms must achieve all of them in order to generate successful outcomes; otherwise, the composition process fails altogether. The most straightforward example is the use of OWL-S process models that specifically tell a composition algorithm how to achieve a functionality on the Web. However, in many WSC problems, it is also desirable to achieve users' preferences that are not absolute objectives, but a solution composition generated by a WSC algorithm must satisfy those preferences as much as possible. In this paper, we first describe a way to augment OWL-S process models by qualitative user preferences. We achieve this by mapping a given set of process models and preferences into a planning language for representing Hierarchical Task Networks (HTNs). We then present SCUP, our new WSC algorithm that performs a best-first search over the possible HTN-style task decompositions by heuristically scoring those decompositions based on ontological reasoning over the input preferences. Finally, we discuss our theoretical and experimental results on the SCUP algorithm.http://www.bibsonomy.org/bibtex/21adb4b2e579baebf8472f1ab8160098e/eswc2008eswc20082008-05-28T14:49:56+02:00web semantic search <span class="authorEditorList"><a href="/author/Bhagdev">Ravish Bhagdev</a>, <a href="/author/Chapman">Sam Chapman</a>, <a href="/author/Ciravegna">Fabio Ciravegna</a>, <a href="/author/Lanfranchi">Vitaveska Lanfranchi</a>, and <a href="/author/Petrelli">Daniela Petrelli</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 14:49:56 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSHybrid Search: Effectively Combining Keywords and Ontology-based Searches2008web semantic search This paper describes hybrid search, a semantic methodology supporting both document and knowledge retrieval via the flexible combination of ontology-based search and keyword-matching. Hybrid search aims to smoothly cope with lack of semantic coverage of document content, which is one of the main limitations of current semantic search methods. In this paper we define hybrid search formally, discuss its compatibility with the current semantic trends and present a reference implementation: K-Search. We then show how the methodology outperforms both keyword-based search and pure semantic search in terms of precision and recall in a set of experiments performed on a very large collection of documents. Experiments carried out with professional users show that users understand the paradigm and consider it very powerful and reliable. K-Search has been ported to 2 applications released at Rolls-Royce plc for searching technical documentation about jet engines.http://www.bibsonomy.org/bibtex/2dc85f0d776078a6b46419598834afa09/eswc2008eswc20082008-05-28T14:49:54+02:00adaptation applications data internet language mining modeling ontologies rich rule semantic user user-interfaces-and-personalization web <span class="authorEditorList"><a href="/author/Schmidt">Kay-Uwe Schmidt</a>, <a href="/author/Dörflinger">Jörg Dörflinger</a>, <a href="/author/Rahmani">Tirdad Rahmani</a>, <a href="/author/Sahbi">Mehdi Sahbi</a>, <a href="/author/Thomas">Susan Thomas</a>, and <a href="/author/Stojanovic">Ljiljana Stojanovic</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 14:49:54 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSAn User Interface Adaptation Architecture for \\Rich Internet Applications2008adaptation applications data internet language mining modeling ontologies rich rule semantic user user-interfaces-and-personalization web The need for adaptive and personalized Rich Internet Application puts a new dimension to already existing approaches of Adaptive Hypermedia Systems. Instead of computing the adaptation steps at the server, Rich Internet Applications need a client-side approach that can react immediately on user input. In this paper we present a novel approach that holistically combines page annotations, semantic Web usage mining, user modeling, ontologies and rules to adapt AJAX pages. The focus of our pater is the conceptual introduction of the autonomous client. An autonomous client directly executes all necessary adaptation steps based on a user model, without requesting any logic on the server. In order to realize this, we use ontologies to annotate Rich Internet Applications and to describe the user model as well as semantic Web usage mining for detecting adaptation rules. Additionally, we provide a detailed overview and evaluation of how we moved resource-intensive ontology processing and rules execution from the server to the client.http://www.bibsonomy.org/bibtex/2695b9700f725c1ceac87066e69883793/eswc2008eswc20082008-05-28T14:49:52+02:00semantic web images faceted sparql application browsing applications-2 <span class="authorEditorList"><a href="/author/Zhao">Jun Zhao</a>, <a href="/author/Klyne">Graham Klyne</a>, and <a href="/author/Shotton">David Shotton</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 14:49:52 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSBuilding a Semantic Web Image Repository for Biological Research Images2008semantic web images faceted sparql application browsing applications-2 Images play a vital role in scientific studies. An image repository would become a costly and meaningless data graveyard without descriptive metadata. We adapted EPrints, a conventional repository software system, to create a biological research image repository for a local research group, in order to publish images with structured metadata with a minimum of development effort. However, in its native installation, this repository cannot easily be linked with information from third parties, and the user interface has limited flexibility. We address these two limitations by providing Semantic Web access to the contents of this image repository, causing the image metadata to become programmatically accessible through a SPARQL endpoint and enabling the images and their metadata to be presented in more flexible faceted browsers, jSpace and Exhibit. We show the feasibility of publishing image metadata on the Semantic Web using existing tools, and examine the inadequacies of the Semantic Web browsers in providing effective user interfaces. We highlight the importance of a loosely coupled software framework that provides a lightweight solution and enables us to switch between alternative components.http://www.bibsonomy.org/bibtex/23186161593481e5e2006b7e64f23d2c7/eswc2008eswc20082008-05-28T14:49:50+02:00techniques activation associations web personalization semantic reasoning spreading user-interfaces-and-personalization <span class="authorEditorList"><a href="/author/Blanco-Fernandez">Yolanda Blanco-Fernandez</a>, <a href="/author/Pazos-Arias">José J. Pazos-Arias</a>, <a href="/author/Gil-Solla">Alberto Gil-Solla</a>, <a href="/author/Ramos-Cabrer">Manuel Ramos-Cabrer</a>, and <a href="/author/Lopez-Nores">Martin Lopez-Nores</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 14:49:50 CEST 2008Berlin, HeidelbergProceedings of the 5th European Semantic Web ConferenceJuneLNCSSemantic Reasoning: A Path To New Possibilities of Personalization2008techniques activation associations web personalization semantic reasoning spreading user-interfaces-and-personalization Recommender systems face up to current information overload by selecting automatically items that match the personal preferences of each user. The so-called content-based recommenders suggest items similar to those the user liked in the past, by resorting to syntactic matching mechanisms. The rigid nature of such mechanisms leads to recommend only items that bear a strong resemblance to those the user already knows. In this paper, we propose a novel content-based strategy that diversifies the offered recommendations by employing reasoning mechanisms borrowed from the Semantic Web. These mechanisms discover extra knowledge about the user's preferences, thus favoring more accurate and flexible personalization processes. Our approach is generic enough to be used in a wide variety of personalization applications and services, in diverse domains and recommender systems. The proposed reasoning-based strategy has been empirically evaluated with a set of real users. The obtained results evidence computational feasibility and significant increases of recommendation accuracy in relation to existing approaches where our reasoning capabilities are disregarded.