Matches in ScholarlyData for { ?s ?p ?o. }
- 222 creator michael-kifer.
- 222 type InProceedings.
- 222 label "WSMO Choreography: From Abstract State Machines to Concurrent Transaction Logic".
- 222 sameAs 222.
- 222 abstract "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.".
- 222 hasAuthorList authorList.
- 222 hasTopic Semantic_Web.
- 222 hasTopic Semantic_Web_Services.
- 222 isPartOf proceedings.
- 222 keyword "semantic web services".
- 222 keyword "service choreography".
- 222 keyword "service contracting".
- 222 keyword "wsmo".
- 222 title "WSMO Choreography: From Abstract State Machines to Concurrent Transaction Logic".
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- item-1 hasContent dumitru-roman.
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- item-2 hasContent michael-kifer.
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- item-3 hasContent dieter-fensel.
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- 244 creator andreas-langegger.
- 244 creator martin-bloechl.
- 244 creator wolfram-woess.
- 244 type InProceedings.
- 244 label "A Semantic Web Middleware for Virtual Data Integration on the Web".
- 244 sameAs 244.
- 244 abstract "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.".
- 244 hasAuthorList authorList.
- 244 hasTopic Collaborative_software.
- 244 hasTopic Data_integration.
- 244 hasTopic SPARQL.
- 244 hasTopic Search_engine.
- 244 hasTopic Semantic_Web.
- 244 isPartOf proceedings.
- 244 keyword "data integration".
- 244 keyword "distributed sparql".
- 244 keyword "semantic web mediator".
- 244 keyword "sparql query processing".
- 244 title "A Semantic Web Middleware for Virtual Data Integration on the Web".
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- item-1 hasContent andreas-langegger.
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- item-3 hasContent martin-bloechl.
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- 245 creator barbara-bazzanella.
- 245 creator heiko-stoermer.
- 245 creator paolo-bouquet.
- 245 type InProceedings.
- 245 label "An Entity Naming System for the Semantic Web".
- 245 sameAs 245.
- 245 abstract "Today, as a result of many independent initiatives, research projects and commercial initiatives, relatively large and important content repositories are available which actually are (or can be easily tranformed into) local ``semantic webs'', namely graphs of resources connected through properties which are defined in some schema or vocabulary. The data published as part of the LinkedData initiative are examples of content already insemantic web format (RDF/OWL); however, any social network, digital library metadata collection, commercial catalog and in principle any relational database could be easily (and mostly syntactically) transformed into a local semantic web. So what is missing enabling factor which can support the automatic and smooth integration of these local ``semantic webs'' into something like the envisaged global Semantic Web? In this paper, we argue that the missing factor is a service which, in analogy with what the DNS did for the Web, can make the addressing mechanism of the Semantic Web global. The addressing mechanism of the WWW was made global by building it on top of the pre-existing DNS service; the addressing mechanism of the Semantic Web cannot go global, as no such pre-existing infrastructure is available, and therefore no fast and easy (semantic) integration is readily available. In this paper, we first introduce and describe what we consider to be the cornerstone of such an infrastructure, a service called Entity Naming System (ENS) which is designed to resolve a local URI or even an arbitrary description of a resource (not only, and not mainly, information resources) into a global identifier for that resource. Then we discuss the main issues and challenges associated with the design and implementation of a scalable and sustainable ENS. Third, we report the results of an experiment which we made on integrating the metadata of several Web and Semantic Web conference with or without a ENS. Finally, we present two simple examples of how existing applications can use the ENS for creating semantically integrated knowledge for the Semantic Web.".
- 245 hasAuthorList authorList.
- 245 hasTopic Data_integration.
- 245 hasTopic Semantic_Web.
- 245 isPartOf proceedings.
- 245 keyword "entity naming system".
- 245 keyword "identity and reference".
- 245 keyword "uri".
- 245 title "An Entity Naming System for the Semantic Web".
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- item-1 hasContent paolo-bouquet.
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- item-3 hasContent barbara-bazzanella.
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- 246 creator alun-preece.
- 246 creator gunnar-aastrand-grimnes.
- 246 creator peter-edwards.
- 246 type InProceedings.