Results 11 to 20 of about 12,237 (214)
Proceedings of the 18th international conference on World wide web, 2009 C-SPARQL is an extension of SPARQL to support continuous queries, registered and continuously executed over RDF data streams, considering windows of such streams. Supporting streams in RDF format guarantees interoperability and opens up important applications, in which reasoners can deal with knowledge that evolves over time.
BARBIERI, DAVIDE FRANCESCO +4 more
openaire +5 more sources
SPARQL-DL: SPARQL Query for OWL-DL.
, 2007 There are many query languages (QLs) that can be used to query RDF and OWL ontologies but neither type is satisfactory for querying OWL-DL ontologies. RDF-based QLs (RDQL, SeRQL, SPARQL) are harder to give a semantics w.r.t. OWL-DL and are more powerful than what OWL-DL reasoners can provide.
Sirin, Evren, Parsia, Bijan
core +12 more sources
Dynamic Provenance for SPARQL Updates [PDF]
, 2014 While the Semantic Web currently can exhibit provenance information by using the W3C PROV standards, there is a "missing link" in connecting PROV to storing and querying for dynamic changes to RDF graphs using SPARQL. Solving this problem would be required for such clear use-cases as the creation of version control systems for RDF.
Harry Halpin, James Cheney
openaire +6 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 +3 more sources
SPARQL-ST: Extending SPARQL to Support Spatiotemporal Queries
, 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
openaire +5 more sources
Toward a Smart Learning Health System: An Ontology-Based Framework. [PDF]
Learn Health SystABSTRACT Background Learning health system (LHS) frameworks have been presented in multiple forms, but there is no standardized representation that captures both their core concepts and the relationships among them. This limits their practical use by health services seeking to design, implement, and evaluate LHS capabilities in changing sociotechnical ...
Ma M, Yu P, Hickman LD.
europepmc +2 more sources
Efficient SPARQL Autocompletion via SPARQL
CoRR, 2021 We show how to achieve fast autocompletion for SPARQL queries on very large knowledge bases. At any position in the body of a SPARQL query, the autocompletion suggests matching subjects, predicates, or objects. The suggestions are context-sensitive in the sense that they lead to a non-empty result and are ranked by their relevance to the part of the ...
Hannah Bast +4 more
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Semantics and Complexity of SPARQL [PDF]
ACM Transactions on Database Systems, 2006 SPARQL is the standard language for querying RDF data. In this article, we address systematically the formal study of the database aspects of SPARQL, concentrating in its graph pattern matching facility. We provide a compositional semantics for the core part of SPARQL, and study the complexity of the evaluation of several fragments of the language ...
Jorge Pérez 0001 +2 more
openaire +9 more sources
sparql-generate/sparql-generate: 2.0.11
, 2021 SPARQL-Generate implementation over Apache ...
KHALFI el mehdi +7 more
core +1 more source
SPARQL Query Rewriting for Implementing Data Integration over Linked Data [PDF]
, 2010 There has been lately an increased activity of publishing structured data in RDF due to the activity of the Linked Data community. The presence on the Web of such a huge information cloud, ranging from academic to geographic to gene related information ...
Gianluca Correndo +9 more
core +2 more sources