• SPARQL

  • Referenced in 132 articles [sw07429]
  • Federation and navigation in SPARQL 1.1. SPARQL is now widely used as the standard query ... included in the new version, SPARQL 1.1. These extensions include several interesting and very useful ... paper, we survey two key features of SPARQL 1.1: Federation and navigation capabilities. We first ... introduce the SPARQL standard presenting its syntax and formal semantics. We then focus...
  • Jena

  • Referenced in 53 articles [sw10685]
  • Search RDF data with SPARQL: SPARQL and the Jena Toolkit open up the semantic ... simple way to locate specific information. SPARQL, a powerful new query language fills that space ... haystack. Take a tour of SPARQL’s features and learn how to use SPARQL queries...
  • Ontop

  • Referenced in 16 articles [sw22931]
  • Answering SPARQL Queries over Databases under OWL 2 QL Entailment Regime. We present an extension ... data access platform Ontop that supports answering SPARQL queries under the OWL 2 QL direct ... theoretical side, we show how any input SPARQL query, OWL 2 QL ontology and R2RML...
  • iSPARQL

  • Referenced in 8 articles [sw26525]
  • Semantic Web Tasks. This research explores three SPARQL-based techniques to solve Semantic Web tasks ... integrate customized similarity functions (CSF) into SPARQL to achieve good results for these tasks ... solution modifiers to post-process a SPARQL solution sequence. The semantics of the three approaches...
  • nSPARQL

  • Referenced in 13 articles [sw11895]
  • combination of nested regular expressions and SPARQL operators. Regarding complexity of evaluation, we prove that...
  • C-SPARQL

  • Referenced in 6 articles [sw02088]
  • SPARQL: a continuous query language for RDF data streams. This article defines C-SPARQL ... extension of SPARQL whose distinguishing feature is the support of continuous queries, i.e. queries registered ... urban computing applications, that systematically cover the SPARQL extensions. The expression of meaningful queries over ... availability of aggregation primitives, thus C-SPARQL also includes extensions in this respect...
  • SPARQ2L

  • Referenced in 6 articles [sw26494]
  • current draft of the anticipated recommendation SPARQL, lack the ability to express queries about arbitrary ... query language SPARQ2L which extends SPARQL with path variables and path variable constraint expressions...
  • DLVHEX

  • Referenced in 8 articles [sw03032]
  • looking for the RDF- or SPARQL-plugin, please have a look at the SourceForge dlvhex...
  • Turtle

  • Referenced in 6 articles [sw25696]
  • triple pattern syntax of the SPARQL W3C Proposed Recommendation. This document specifies a language that...
  • Wikibase

  • Referenced in 6 articles [sw28903]
  • contents of a Wikibase installation using SPARQL. Wikibase is also a set of reusable components...
  • ARQ

  • Referenced in 3 articles [sw27414]
  • SPARQL Processor for Jena. ARQ is a query engine for Jena that supports the SPARQL ... Query language. SPARQL is the query language developed by the W3C RDF Data Access Working...
  • ViziQuer

  • Referenced in 2 articles [sw26464]
  • ViziQuer: A Tool to Explore and Query SPARQL Endpoints. The presented tool uses a novel ... approach to explore and query a SPARQL endpoint. The tool is simple ... only to enter an address of a SPARQL endpoint of one’s interest. The tool ... schema and use it to construct a SPARQL query according to the data schema...
  • HiBISCuS

  • Referenced in 2 articles [sw36021]
  • HiBISCuS: Hypergraph-Based Source Selection for SPARQL Endpoint Federation. Efficient federated query processing ... hypergraph-based source selection approach to federated SPARQL querying. Our approach can be directly combined ... with existing SPARQL query federation engines to achieve the same recall while querying fewer data ... sources. We extend three well-known SPARQL query federation engines with HiBISCus and compare...
  • ANAPSID

  • Referenced in 2 articles [sw36023]
  • ANAPSID: An Adaptive Query Processing Engine for SPARQL Endpoints. Following the design rules of Linked ... Data, the number of available SPARQL endpoints that support remote query processing is quickly growing ... present ANAPSID, an adaptive query engine for SPARQL endpoints that adapts query execution schedulers ... time conditions. ANAPSID provides physical SPARQL operators that detect when a source becomes blocked...
  • CDAOstore

  • Referenced in 4 articles [sw06415]
  • reach of standard RDF query languages (e.g., SPARQL). CDAOStore is operational and it already hosts...
  • KAON2

  • Referenced in 4 articles [sw09838]
  • engine for answering conjunctive queries (expressed using SPARQL syntax), A DIG interface, allowing access from...
  • RDFox

  • Referenced in 4 articles [sw33097]
  • supports materialisation-based parallel datalog reasoning and SPARQL query answering. RDFox uses novel and highly...
  • PelletSpatial

  • Referenced in 3 articles [sw11708]
  • RDF/OWL. As such, it can answer mixed SPARQL queries over both relation types. PelletSpatial implements...
  • R2RML

  • Referenced in 3 articles [sw25697]
  • Processors could, for example, offer a virtual SPARQL endpoint over the mapped relational data...
  • D2RQ

  • Referenced in 3 articles [sw26495]
  • query a non-RDF database using SPARQL; access the content of the database as Linked...