Matches in ScholarlyData for { ?s ?p ?o. }
- 152 creator alta-van-der-merwe.
- 152 creator andries-barnard.
- 152 creator aurona-gerber.
- 152 type InProceedings.
- 152 label "A Functional Semantic Web Architecture".
- 152 sameAs 152.
- 152 abstract "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.".
- 152 hasAuthorList authorList.
- 152 hasTopic Collaborative_software.
- 152 hasTopic Semantic_Web.
- 152 hasTopic Web_2.0.
- 152 isPartOf proceedings.
- 152 keyword "semantic web architecture".
- 152 keyword "software engineering".
- 152 keyword "system architecture".
- 152 title "A Functional Semantic Web Architecture".
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- item-1 hasContent aurona-gerber.
- item-1 next item-2.
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- item-2 hasContent alta-van-der-merwe.
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- item-3 hasContent andries-barnard.
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- 159 creator siegfried-handschuh.
- 159 creator stefan-decker.
- 159 creator vinhtuan-thai.
- 159 type InProceedings.
- 159 label "IVEA: An Information Visualization Tool for Personalized Exploratory Document Collection Analysis".
- 159 sameAs 159.
- 159 abstract "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.".
- 159 hasAuthorList authorList.
- 159 hasTopic Ontology_%28computer_science%29.
- 159 hasTopic Personalization.
- 159 hasTopic Semantic_Web.
- 159 hasTopic User_interface.
- 159 hasTopic Web_Ontology_Language.
- 159 isPartOf proceedings.
- 159 keyword "exploratory visualization".
- 159 keyword "personal information management".
- 159 keyword "pimo ontology".
- 159 keyword "social semantic desktop".
- 159 keyword "user interfaces".
- 159 title "IVEA: An Information Visualization Tool for Personalized Exploratory Document Collection Analysis".
- authorList type List.
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- item-1 hasContent vinhtuan-thai.
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- item-2 hasContent siegfried-handschuh.
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- item-3 hasContent stefan-decker.
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- 168 creator bastian-quilitz.
- 168 creator ulf-leser.
- 168 type InProceedings.
- 168 label "Querying Distributed RDF Data Sources with SPARQL".
- 168 sameAs 168.
- 168 abstract "Integrated access to multiple distributed and autonomous RDF data sources is a key challenge for many semantic web applications. As a reaction to this challenge, SPARQL, the current W3C Proposed Recommendation for an RDF query language, supports querying of multiple RDF graphs. However, the current standard does not provide transparent query federation, which makes query formulation hard and lengthy. Furthermore, current implementations of SPARQL load all RDF graphs mentioned in a query to the local machine. This usually incurs a large overhead in network traffic, and sometimes is simply impossible for technical or legal reasons. To overcome these problems we present DARQ, an engine for federated SPARQL queries. DARQ provides transparent query access to multiple SPARQL services, i.e., it gives the user the impression to query one single RDF graph despite the real data being distributed on the web. A service description language enables the query engine to decompose a query into sub-queries, each of which can be answered by an individual service. DARQ also uses query rewriting and cost-based query optimization to speed-up query execution. Experiments show that these optimizations significantly improve query performance even when only a very limited amount of statistical information is available. DARQ is available under GPL License at http://darq.sf.net/.".
- 168 hasAuthorList authorList.
- 168 hasTopic Benchmark_%28computing%29.
- 168 hasTopic Data_integration.
- 168 hasTopic Database_management_system.
- 168 hasTopic SPARQL.
- 168 hasTopic Scalability.
- 168 hasTopic Semantic_Web.
- 168 isPartOf proceedings.
- 168 keyword "federated queries".
- 168 keyword "query optimization".
- 168 keyword "query processing".
- 168 keyword "sparql".
- 168 title "Querying Distributed RDF Data Sources with SPARQL".
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- item-1 type ListItem.
- item-1 hasContent bastian-quilitz.
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- item-2 hasContent ulf-leser.
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- 186 creator alessio-gugliotta.
- 186 creator john-domingue.