Results 1 to 10 of about 25,678 (255)
, 2016 This paper presents a thorough study of negation in SPARQL. The types of negation supported in SPARQL are identified and their main features discussed. Then, we study the expressive power of the corresponding negation operators. At this point, we identify a core SPARQL algebra which could be used instead of the W3C SPARQL algebra.
Renzo Angles, Claudio Gutiérrez
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Medieval Manuscripts and Their Migrations: Using SPARQL to Investigate the Research Potential of an Aggregated Knowledge Graph [PDF]
Digital Medievalist, 2022 Although the RDF query language SPARQL has a reputation for being opaque and difficult for traditional humanists to learn, it holds great potential for opening up vast amounts of Linked Open Data to researchers willing to take on its challenges.
Doug Emery +7 more
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On the formulation of performant SPARQL queries [PDF]
SSRN Electronic Journal, 2014 The combination of the flexibility of RDF and the expressiveness of SPARQL provides a powerful mechanism to model, integrate and query data. However, these properties also mean that it is nontrivial to write performant SPARQL queries. Indeed, it is quite easy to create queries that tax even the most optimised triple stores.
Antonis Loizou, Renzo Angles, Paul Groth
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A survey of RDF stores & SPARQL engines for querying knowledge graphs [PDF]
VLDB Journal, 2021 Waqas Ali, Aidan Hogan
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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
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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
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Preliminary results of a conceptual graph query language
Proceedings of the International Florida Artificial Intelligence Research Society Conference, 2023 The contribution of this article is to bring the interesting features of SPARQL to the conceptual graph model while preserving its distinctive features and especially the graphical ones.
David Genest +2 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 ...
Perez, Jorge +2 more
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VP-RDF: An RDF Based Framework to Introduce the Viewpoint in the Description of Resources
Applied Computer Systems, 2021 The description of resources and their relationships is an essential task on the web. Generally, the web users do not share the same interests and viewpoints.
Djama Ouahiba
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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
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