Results 11 to 20 of about 11,868 (248)
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.
Jorge Pérez +2 more
semanticscholar +12 more sources
Flexible Querying for SPARQL [PDF]
, 2014 Flexible querying techniques can be used to enhance users' access to heterogeneous data sets, such as Linked Open Data. This paper extends SPARQL 1.1 with approximation and relaxation operators that can be applied to regular expressions for querying property paths in order to find more answers than would be returned by the exact form of a user query ...
Andrea Calı̀ +3 more
openalex +3 more sources
A survey of RDF stores & SPARQL engines for querying knowledge graphs [PDF]
The VLDB journal, 2021 RDF has seen increased adoption in recent years, prompting the standardization of the SPARQL query language for RDF, and the development of local and distributed engines for processing SPARQL queries.
Waqas Ali +4 more
semanticscholar +1 more source
Facade-X: an opinionated approach to SPARQL anything [PDF]
Studies on the Semantic Web, 2021 The Semantic Web research community understood since its beginning how crucial it is to equip practitioners with methods to transform non-RDF resources into RDF. Proposals focus on either engineering content transformations or accessing non-RDF resources
E. Daga +3 more
semanticscholar +1 more source
Consultas Skyline en SPARQL: Una Visión General
Revista Técnica de la Facultad de Ingeniería, 2022 El crecimiento de los conjuntos de datos RDF (Resource Description Framework) y la expansión de su uso junto con la definición de SPARQL, un lenguaje de consulta declarativo, han convertido la gestión de datos RDF en un área activa de investigación y ...
Marlene Goncalves Da Silva +1 more
doaj +1 more source
Semantic Web Recommender System over Different Operating Platforms
UHD Journal of Science and Technology, 2022 Semantic-Web Recommender System (SWRS) evaluation over different operating systems (OSs) used to facilitate and improve human electronic recommendation management (HERM).
Halo Khalil Sharif +1 more
doaj +1 more source
SPARQL beyond Subgraph Matching [PDF]
, 2010 We extend the Semantic Web query language SPARQL by defining the semantics of SPARQL queries under the entailment regimes of RDF, RDFS, and OWL. The proposed extensions are part of the SPARQL 1.1 Entailment Regimes working draft which is currently being developed as part of the W3C standardization process of SPARQL 1.1.
Birte Glimm, Markus Krötzsch
openalex +5 more sources
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 +4 more sources
LSQ 2.0: A linked dataset of SPARQL query logs
Semantic Web, 2022 We present the Linked SPARQL Queries (LSQ) dataset, which currently describes 43.95 million executions of 11.56 million unique SPARQL queries extracted from the logs of 27 different endpoints. The LSQ dataset provides RDF descriptions of each such query,
Claus Stadler +6 more
semanticscholar +1 more source
Applying the knowledge base of CWE weaknesses in software design
Вестник КазНУ. Серия математика, механика, информатика, 2020 The article deals with the issues of organizing software weaknesses by the software architect at the stage of its design using the developed ontological knowledge base of CWE weaknesses.
Zh. E. Sartabanova +2 more
doaj +1 more source