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SPARQLGX : Une Solution Distribuée pour RDF Traduisant SPARQL vers Spark
, 2016 Damien Graux +3 more
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Proceedings of the 30th ACM International Conference on Information & Knowledge Management, 2021
The wide adaptation of the Semantic Web and the Resource Description Framework (RDF) has made available many important datasets. The SPARQL query language facilitates the exploration of this information, which is available in a semi-structured way that does not comply with relational data models, deviating from exploration techniques that most ...
Maria Krommyda, Verena Kantere
openaire +2 more sources
The wide adaptation of the Semantic Web and the Resource Description Framework (RDF) has made available many important datasets. The SPARQL query language facilitates the exploration of this information, which is available in a semi-structured way that does not comply with relational data models, deviating from exploration techniques that most ...
Maria Krommyda, Verena Kantere
openaire +2 more sources
International Journal on Semantic Web and Information Systems, 2009
The SPARQL Query Language for RDF and the SPARQL Protocol for RDF are implemented by a growing number of storage systems and are used within enterprise and open Web settings. As SPARQL is taken up by the community, there is a growing need for benchmarks to compare the performance of storage systems that expose SPARQL endpoints via the SPARQL protocol ...
Bizer, Christian, Schultz, Andreas
openaire +2 more sources
The SPARQL Query Language for RDF and the SPARQL Protocol for RDF are implemented by a growing number of storage systems and are used within enterprise and open Web settings. As SPARQL is taken up by the community, there is a growing need for benchmarks to compare the performance of storage systems that expose SPARQL endpoints via the SPARQL protocol ...
Bizer, Christian, Schultz, Andreas
openaire +2 more sources
SPARQL-ST: Extending SPARQL to Support Spatiotemporal Queries [PDF]
, 2011 Spatial and temporal data is plentiful on the Web, and Semantic Web technologies have the potential to make this data more accessible and more useful. Semantic Web researchers have consequently made progress towards better handling of spatial and temporal data.SPARQL, the W3C-recommended query language for RDF, does not adequately support complex ...
Perry, Matthew +2 more
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2009
The Resource Description Framework (RDF) is the standard data model for representing information about World Wide Web resources. In January 2008, it was released the recommendation of the W3C for querying RDF data, a query language called SPARQL. In this chapter, we give a detailed description of the semantics of this language.
Arenas Saavedra, Marcelo Alejandro +2 more
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The Resource Description Framework (RDF) is the standard data model for representing information about World Wide Web resources. In January 2008, it was released the recommendation of the W3C for querying RDF data, a query language called SPARQL. In this chapter, we give a detailed description of the semantics of this language.
Arenas Saavedra, Marcelo Alejandro +2 more
openaire +3 more sources
f-SPARQL: A Flexible Extension of SPARQL
2010We propose an flexible extension of SPARQL by introducing fuzzy set theory and the α-cut operation of fuzzy numbers into SPARQL. We show how to efficiently compute the top-k answers of flexible SPARQL queries with regard to membership degrees and user-defined weights.
Zongmin Ma, Li Yan, Jingwei Cheng
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Information Systems, 2022
Abstract Although the amount of RDF data has been steadily increasing over the years, the majority of information on the Web is still residing in other formats, and is often not accessible to Semantic Web services. A lot of this data is available through APIs serving JSON documents. In this work we propose a way of extending SPARQL with the option to
Juan L. Reutter +7 more
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Abstract Although the amount of RDF data has been steadily increasing over the years, the majority of information on the Web is still residing in other formats, and is often not accessible to Semantic Web services. A lot of this data is available through APIs serving JSON documents. In this work we propose a way of extending SPARQL with the option to
Juan L. Reutter +7 more
openaire +3 more sources
SPARQL-MM - Extending SPARQL to Media Fragments
2014Interconnecting machine readable data with multimedia assets and fragments has recently become a common practice. But specific retrieval techniques for the so called Semantic Multimedia data are still lacking. On our poster we present SPARQL-MM, a function set that extends SPARQL to Media Fragment facilities by introducing spatio-temporal filter and ...
Kai Schlegel +4 more
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On the Selection of SPARQL Endpoints to Efficiently Execute Federated SPARQL Queries
2016We consider the problem of source selection and query decomposition in federations of SPARQL endpoints, where query decompositions of a SPARQL query should reduce execution time and maximize answer completeness. This problem is in general intractable, and performance and answer completeness of SPARQL queries can be considerably affected when the number
Vidal, María Esther +4 more
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