• SPARQL

  • Referenced in 128 articles [sw07429]
  • used as the standard query language for RDF. Since the release of its first version...
  • Jena

  • Referenced in 52 articles [sw10685]
  • Search RDF data with SPARQL: SPARQL and the Jena Toolkit open up the semantic ... more data is being stored in RDF formats like RSS, a need has arisen ... find the data you need in the RDF haystack. Take a tour of SPARQL...
  • DAML+OIL

  • Referenced in 37 articles [sw02445]
  • builds on earlier W3C standards such as RDF and RDF Schema, and extends these languages...
  • swrl

  • Referenced in 48 articles [sw14002]
  • Presentation Syntax as well as an RDF concrete syntax based on the OWL RDF/XML exchange...
  • TRIPLE

  • Referenced in 21 articles [sw02460]
  • especially designed for querying and transforming RDF models. TRIPLE can be viewed as a successor ... SiLRI (Simple Logic-based RDF Interpreter). One of the most important differences to F-Logic ... data models like UML, Topic Maps, or RDF Schema. Description logics extensions of RDF (Schema...
  • nSPARQL

  • Referenced in 13 articles [sw11895]
  • Nsparql: a navigational language for RDF. Navigational features have been largely recognized as fundamental ... fact has motivated several authors to propose RDF query languages with navigational capabilities. In particular ... nested regular expressions are appropriate to navigate RDF data, and we have proposed the nSPARQL ... query language for RDF, that uses nested regular expressions as building blocks. In this paper...
  • N3Logic

  • Referenced in 9 articles [sw02003]
  • knowledge models such as Resource Description Framework (RDF), the Semantic Web provides a unifying representation ... expressed in a Web environment. It extends RDF with syntax for nested graphs and quantified ... minimal extension to the RDF data model such that the same language can be used...
  • SWORD

  • Referenced in 12 articles [sw10584]
  • service-description standards such as WSDL, SOAP, RDF and DAML. We also distinguish SWORD from...
  • BioPortal

  • Referenced in 12 articles [sw22917]
  • browsers to ontologies developed in OWL, RDF, OBO format and Protégé frames. BioPortal functionality includes...
  • Turtle

  • Referenced in 6 articles [sw25696]
  • Turtle - Terse RDF Triple Language. The Resource Description Framework (RDF) is a general-purpose language ... This document defines a textual syntax for RDF called Turtle that allows RDF graphs...
  • SPARQ2L

  • Referenced in 6 articles [sw26494]
  • towards support for subgraph extraction queries in rdf databases. Many applications in analytical domains often ... efficiently evaluated on disk resident RDF graphs. The effectiveness of our proposal is demonstrated...
  • C-SPARQL

  • Referenced in 5 articles [sw02088]
  • SPARQL: a continuous query language for RDF data streams. This article defines C-SPARQL ... continuous queries, i.e. queries registered over RDF data streams and then continuously executed. Queries consider ... data is continuously flowing. Supporting streams in RDF format guarantees interoperability and opens up important...
  • DLVHEX

  • Referenced in 8 articles [sw03032]
  • page. If you are looking for the RDF- or SPARQL-plugin, please have a look...
  • CDAOstore

  • Referenced in 4 articles [sw06415]
  • been implemented on top of an RDF triple store, using a combination of standard ... structure is beyond the reach of standard RDF query languages (e.g., SPARQL). CDAOStore is operational ... already hosts over 90 million RDF triples, imported from TreeBase or submitted by other domain...
  • D2RQ

  • Referenced in 3 articles [sw26495]
  • accessing relational databases as virtual, read-only RDF graphs. It offers RDF-based access ... without having to replicate it into an RDF store. Using D2RQ you can: query ... RDF database using SPARQL; access the content of the database as Linked Data over ... create custom dumps of the database in RDF formats for loading; into an RDF store...
  • RDF123

  • Referenced in 3 articles [sw26493]
  • RDF123: From Spreadsheets to RDF. We describe RDF123, a highly flexible open-source tool ... translating spreadsheet data to RDF. Existing spreadsheet-to-rdf tools typically map only to star ... shaped RDF graphs, i.e. each spreadsheet row is an instance, with each column representing ... mapped with a fairly different RDF scheme. Two interfaces are available. The first...
  • R2RML

  • Referenced in 3 articles [sw25697]
  • R2RML: RDB to RDF Mapping Language. This document describes R2RML, a language for expressing customized ... mappings from relational databases to RDF datasets. Such mappings provide the ability to view existing ... relational data in the RDF data model, expressed in a structure and target vocabulary ... author’s choice. R2RML mappings are themselves RDF graphs and written down in Turtle syntax...
  • HPRD

  • Referenced in 2 articles [sw02834]
  • HPRD: a high performance RDF database. In this paper a high performance storage system ... RDF documents is introduced. The system employs optimized index structures for RDF data and efficient ... RDF query evaluation. The index scheme consists of 3 types of indices. Triple index manages ... basic RDF triples by dividing original RDF graph into several sub-graphs. Path index manages...
  • R2D

  • Referenced in 2 articles [sw26497]
  • framework for the relational transformation of RDF data. The astronomical growth of the World Wide ... automated manner. The Resource Description Framework (RDF) is one such standard proposed ... above need. The ubiquitous acceptance of RDF on the Internet has resulted in the emergence ... data storage paradigm, the RDF Graph Model, which, as with any data storage methodology, requires...
  • ARQ

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