| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| |
| |
| <title>Apache Jena - ARQ - A SPARQL Processor for Jena</title> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> |
| |
| <link href="/css/bootstrap.min.css" rel="stylesheet" media="screen"> |
| <link href="/css/bootstrap-icons.css" rel="stylesheet" media="screen"><link rel="stylesheet" type="text/css" href="https://jena.apache.org/sass/jena.1b17c39a117e22b46db4c66f6395dc27c134a60377d87d2d5745b8600eb69722.css" integrity="sha256-GxfDmhF+IrRttMZvY5XcJ8E0pgN32H0tV0W4YA62lyI="> |
| <link rel="shortcut icon" href="/images/favicon.ico" /> |
| |
| </head> |
| |
| <body> |
| |
| <nav class="navbar navbar-expand-lg bg-body-tertiary" role="navigation"> |
| <div class="container"> |
| <div class="navbar-header"> |
| <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"> |
| <span class="navbar-toggler-icon"></span> |
| </button> |
| <a class="navbar-brand" href="/index.html"> |
| <img class="logo-menu" src="/images/jena-logo/jena-logo-notext-small.png" alt="jena logo">Apache Jena</a> |
| </div> |
| |
| <div class="collapse navbar-collapse" id="navbarNav"> |
| <ul class="navbar-nav me-auto mb-2 mb-lg-0"> |
| <li id="homepage" class="nav-item"><a class="nav-link" href="/index.html"><span class="bi-house"></span> Home</a></li> |
| <li id="download" class="nav-item"><a class="nav-link" href="/download/index.cgi"><span class="bi-download"></span> Download</a></li> |
| <li class="nav-item dropdown"> |
| <a href="#" class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false"><span class="bi-journal"></span> Learn <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| <li class="dropdown-header">Tutorials</li> |
| <li><a class="dropdown-item" href="/tutorials/index.html">Overview</a></li> |
| <li><a class="dropdown-item" href="/documentation/fuseki2/index.html">Fuseki Triplestore</a></li> |
| <li><a class="dropdown-item" href="/documentation/notes/index.html">How-To's</a></li> |
| <li><a class="dropdown-item" href="/documentation/query/manipulating_sparql_using_arq.html">Manipulating SPARQL using ARQ</a></li> |
| <li><a class="dropdown-item" href="/tutorials/rdf_api.html">RDF core API tutorial</a></li> |
| <li><a class="dropdown-item" href="/tutorials/sparql.html">SPARQL tutorial</a></li> |
| <li><a class="dropdown-item" href="/tutorials/using_jena_with_eclipse.html">Using Jena with Eclipse</a></li> |
| <li class="dropdown-divider"></li> |
| <li class="dropdown-header">References</li> |
| <li><a class="dropdown-item" href="/documentation/index.html">Overview</a></li> |
| <li><a class="dropdown-item" href="/documentation/query/index.html">ARQ (SPARQL)</a></li> |
| <li><a class="dropdown-item" href="/documentation/io/">RDF I/O</a></li> |
| <li><a class="dropdown-item" href="/documentation/assembler/index.html">Assembler</a></li> |
| <li><a class="dropdown-item" href="/documentation/tools/index.html">Command-line tools</a></li> |
| <li><a class="dropdown-item" href="/documentation/rdfs/">Data with RDFS Inferencing</a></li> |
| <li><a class="dropdown-item" href="/documentation/geosparql/index.html">GeoSPARQL</a></li> |
| <li><a class="dropdown-item" href="/documentation/inference/index.html">Inference API</a></li> |
| <li><a class="dropdown-item" href="/documentation/ontology/">Ontology API</a></li> |
| <li><a class="dropdown-item" href="/documentation/permissions/index.html">Permissions</a></li> |
| <li><a class="dropdown-item" href="/documentation/extras/querybuilder/index.html">Query Builder</a></li> |
| <li><a class="dropdown-item" href="/documentation/rdf/index.html">RDF API</a></li> |
| <li><a class="dropdown-item" href="/documentation/rdfconnection/">RDF Connection - SPARQL API</a></li> |
| <li><a class="dropdown-item" href="/documentation/rdfstar/index.html">RDF-star</a></li> |
| <li><a class="dropdown-item" href="/documentation/shacl/index.html">SHACL</a></li> |
| <li><a class="dropdown-item" href="/documentation/shex/index.html">ShEx</a></li> |
| <li><a class="dropdown-item" href="/documentation/tdb/index.html">TDB</a></li> |
| <li><a class="dropdown-item" href="/documentation/tdb2/index.html">TDB2</a></li> |
| <li><a class="dropdown-item" href="/documentation/query/text-query.html">Text Search</a></li> |
| </ul> |
| </li> |
| |
| <li class="nav-item dropdown"> |
| <a href="#" class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false"><span class="bi-journal-code"></span> Javadoc <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| <li><a class="dropdown-item" href="/documentation/javadoc.html">All Javadoc</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/arq/">ARQ</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/fuseki2/">Fuseki</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/geosparql/">GeoSPARQL</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/jena/">Jena Core</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/permissions/">Permissions</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/extras/querybuilder/">Query Builder</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/shacl/">SHACL</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/tdb/">TDB</a></li> |
| <li><a class="dropdown-item" href="/documentation/javadoc/text/">Text Search</a></li> |
| </ul> |
| </li> |
| </ul> |
| <form class="d-flex" role="search" action="/search" method="GET"> |
| <div class="input-group"> |
| <input class="form-control border-end-0 border m-0" type="search" name="q" id="search-query" placeholder="Search...." aria-label="Search" style="width: 10rem;"> |
| <button class="btn btn-outline-secondary border-start-0 border" type="submit"> |
| <i class="bi-search"></i> |
| </button> |
| </div> |
| </form> |
| <ul class="navbar-nav"> |
| <li id="ask" class="nav-item"><a class="nav-link" href="/help_and_support/index.html" title="Ask"><span class="bi-patch-question"></span><span class="text-body d-none d-xxl-inline"> Ask</span></a></li> |
| |
| <li class="nav-item dropdown"> |
| <a href="#" title="Get involved" class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false"><span class="bi-megaphone"></span><span class="text-body d-none d-xxl-inline"> Get involved </span><b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| <li><a class="dropdown-item" href="/getting_involved/index.html">Contribute</a></li> |
| <li><a class="dropdown-item" href="/help_and_support/bugs_and_suggestions.html">Report a bug</a></li> |
| <li class="dropdown-divider"></li> |
| <li class="dropdown-header">Project</li> |
| <li><a class="dropdown-item" href="/about_jena/about.html">About Jena</a></li> |
| <li><a class="dropdown-item" href="/about_jena/architecture.html">Architecture</a></li> |
| <li><a class="dropdown-item" href="/about_jena/citing.html">Citing</a></li> |
| <li><a class="dropdown-item" href="/about_jena/team.html">Project team</a></li> |
| <li><a class="dropdown-item" href="/about_jena/contributions.html">Related projects</a></li> |
| <li><a class="dropdown-item" href="/about_jena/roadmap.html">Roadmap</a></li> |
| <li><a class="dropdown-item" href="/about_jena/security-advisories.html">Security Advisories</a></li> |
| <li class="dropdown-divider"></li> |
| <li class="dropdown-header">ASF</li> |
| <li><a class="dropdown-item" href="https://www.apache.org/">Apache Software Foundation</a></li> |
| <li><a class="dropdown-item" href="https://www.apache.org/foundation/sponsorship.html">Become a Sponsor</a></li> |
| <li><a class="dropdown-item" href="https://www.apache.org/licenses/LICENSE-2.0">License</a></li> |
| <li><a class="dropdown-item" href="https://www.apache.org/security/">Security</a></li> |
| <li><a class="dropdown-item" href="https://www.apache.org/foundation/thanks.html">Thanks</a></li> |
| </ul> |
| </li> |
| |
| |
| |
| |
| <li class="nav-item" id="edit"><a class="nav-link" href="https://github.com/apache/jena-site/edit/main/source/documentation/query/__index.md" title="Edit this page on GitHub"><span class="bi-pencil-square"></span><span class="text-body d-none d-xxl-inline"> Edit this page</span></a></li> |
| </ul> |
| </div> |
| </div> |
| </nav> |
| |
| <div class="container"> |
| <div class="row"> |
| <div class="col-md-12"> |
| |
| <div id="breadcrumbs"> |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| <ol class="breadcrumb mt-4 p-2 bg-body-tertiary">
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| <li class="breadcrumb-item"><a href='/documentation'>DOCUMENTATION</a></li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| <li class="breadcrumb-item active">QUERY</li>
|
|
|
|
|
|
|
|
|
| </ol>
|
|
|
|
|
|
|
| |
| </div> |
| <h1 class="title">ARQ - A SPARQL Processor for Jena</h1> |
| |
| |
| <main class="d-flex flex-xl-row flex-column"> |
| |
| <aside class="text-muted align-self-start mb-3 p-0 d-xl-none d-block"> |
| <h2 class="h6 sticky-top m-0 p-2 bg-body-tertiary">On this page</h2> |
| <nav id="TableOfContents"> |
| <ul> |
| <li><a href="#arq-features">ARQ Features</a></li> |
| <li><a href="#introduction">Introduction</a></li> |
| <li><a href="#extensions">Extensions</a></li> |
| <li><a href="#update">Update</a></li> |
| <li><a href="#see-also">See Also</a></li> |
| <li><a href="#w3c-documents">W3C Documents</a></li> |
| <li><a href="#articles">Articles</a></li> |
| <li><a href="#rdf-syntax-specifications">RDF Syntax Specifications</a></li> |
| </ul> |
| </nav> |
| </aside> |
| <article class="flex-column me-lg-4"> |
| <p>ARQ is a query engine for <a href="https://jena.apache.org/">Jena</a> that |
| supports the |
| <a href="http://www.w3.org/TR/sparql11-query/">SPARQL RDF Query language</a>. |
| SPARQL is the query language developed by the W3C |
| <a href="http://www.w3.org/2001/sw/DataAccess/">RDF Data Access Working Group</a>.</p> |
| <h2 id="arq-features">ARQ Features</h2> |
| <ul> |
| <li>Standard SPARQL</li> |
| <li>Free text search via Lucene</li> |
| <li>SPARQL/Update</li> |
| <li>Access and extension of the SPARQL algebra</li> |
| <li>Support for custom filter functions, including javascript functions</li> |
| <li>Property functions for custom processing of semantic |
| relationships</li> |
| <li>Aggregation, GROUP BY and assignment as SPARQL extensions</li> |
| <li>Support for federated query</li> |
| <li>Support for extension to other storage systems</li> |
| <li>Client-support for remote access to any SPARQL endpoint</li> |
| </ul> |
| <h2 id="introduction">Introduction</h2> |
| <ul> |
| <li><a href="/tutorials/sparql.html">A Brief Tutorial on SPARQL</a></li> |
| <li><a href="app_api.html">Application API</a> - covers the majority of |
| application usages</li> |
| <li><a href="faq.html">Frequently Asked Questions</a></li> |
| <li><a href="support.html">ARQ Support</a></li> |
| <li>Application <a href="/documentation/javadoc/arq/index.html">javadoc</a></li> |
| <li><a href="cmds.html">Command line utilities</a></li> |
| <li><a href="sparql-remote.html">Querying remote SPARQL services</a> |
| <ul> |
| <li><a href="http-auth.html">HTTP Authentication for ARQ</a></li> |
| </ul> |
| </li> |
| <li><a href="logging.html">Logging</a></li> |
| <li><a href="explain.html">Explaining queries</a></li> |
| <li><a href="manipulating_sparql_using_arq.html">Tutorial: manipulating SPARQL using ARQ</a></li> |
| <li><a href="service.html">Basic federated query (<code>SERVICE</code>)</a></li> |
| <li><a href="property_paths.html">Property paths</a></li> |
| <li><a href="group-by.html">GROUP BY and counting</a></li> |
| <li><a href="select_expr.html">SELECT expressions</a></li> |
| <li><a href="sub-select.html">Sub-SELECT</a></li> |
| <li><a href="negation.html">Negation</a></li> |
| </ul> |
| <p>Features of ARQ that are legal SPARQL syntax</p> |
| <ul> |
| <li><a href="function_forms.html">Conditions in FILTERs</a></li> |
| <li><a href="text-query.html">Free text searches</a></li> |
| <li><a href="rdf_lists.html">Accessing lists</a> (RDF collections)</li> |
| <li><a href="extension.html">Extension mechanisms</a> |
| <ul> |
| <li><a href="extension.html#valueFunctions">Custom Expression Functions</a></li> |
| <li><a href="extension.html#property-functions">Property Functions</a></li> |
| </ul> |
| </li> |
| <li>Library |
| <ul> |
| <li><a href="library-function.html">Expression function library</a></li> |
| <li><a href="library-propfunc.html">Property function library</a></li> |
| </ul> |
| </li> |
| <li><a href="writing_functions.html">Writing SPARQL functions</a></li> |
| <li><a href="javascript-functions.html">Writing SPARQL functions in JavaScript</a></li> |
| <li><a href="custom_service_executors.html">Custom execution of <code>SERVICE</code></a></li> |
| <li><a href="programmatic.html">Constructing queries programmatically</a></li> |
| <li><a href="parameterized-sparql-strings.html">Parameterized query strings</a></li> |
| <li><a href="algebra.html">ARQ and the SPARQL algebra</a></li> |
| <li><a href="arq-query-eval.html">Extending ARQ query execution and accessing different storage implementations</a></li> |
| <li><a href="custom_aggregates.html">Custom aggregates</a></li> |
| <li><a href="service_enhancer.html">Caching and bulk-retrieval for SERVICE</a></li> |
| </ul> |
| <h2 id="extensions">Extensions</h2> |
| <p>Feature of ARQ that go beyond SPARQL syntax.</p> |
| <ul> |
| <li><a href="lateral-join.html">LATERAL Join</a></li> |
| <li><a href="https://w3c.github.io/rdf-star/">RDF-star</a></li> |
| <li>Operators and functions |
| <a href="https://www.w3.org/TR/xpath-functions/#func-numeric-mod"><code>MOD</code></a> |
| and <a href="https://www.w3.org/TR/xpath-functions/#func-numeric-integer-divide"><code>IDIV</code></a> for modulus and integer division.</li> |
| <li><a href="assignment.html">LET variable assignment</a></li> |
| <li><a href="collation.html">Order results using a Collation</a></li> |
| <li><a href="construct-quad.html">Construct Quad</a></li> |
| <li><a href="generate-json-from-sparql.html">Generate JSON from SPARQL</a></li> |
| </ul> |
| <h2 id="update">Update</h2> |
| <p>ARQ supports the W3C standard SPARQL Update language.</p> |
| <ul> |
| <li><a href="http://www.w3.org/TR/sparql11-update/">SPARQL Update</a></li> |
| <li><a href="update.html">The ARQ SPARQL/Update API</a></li> |
| </ul> |
| <h2 id="see-also">See Also</h2> |
| <ul> |
| <li><a href="../fuseki2/index.html">Fuseki</a> - Server implementation of the SPARQL protocol.</li> |
| <li><a href="../tdb">TDB - A SPARQL database for Jena</a>, a pure Java persistence layer for large graphs, high performance applications and embedded use.</li> |
| <li><a href="../rdfconnection">RDFConnection</a>, a unified API for SPARQL Query, Update and Graph Store Protocol.</li> |
| </ul> |
| <h2 id="w3c-documents">W3C Documents</h2> |
| <ul> |
| <li><a href="http://www.w3.org/TR/sparql11-query/">SPARQL Query Language specification</a></li> |
| <li><a href="https://www.w3.org/TR/sparql11-results-json/">SPARQL Query Results JSON Format</a></li> |
| <li><a href="http://www.w3.org/TR/rdf-sparql-protocol/">SPARQL Protocol</a></li> |
| </ul> |
| <h2 id="articles">Articles</h2> |
| <p>Articles and documentation elsewhere:</p> |
| <ul> |
| <li><a href="http://xml.com/lpt/a/2005/11/16/introducing-sparql-querying-semantic-web-tutorial.html">Introducing SPARQL: Querying the Semantic Web</a> |
| (<a href="http://www.xml.com/">xml.com</a> article by Leigh Dodds)</li> |
| <li><a href="http://www.ibm.com/developerworks/xml/library/j-sparql/">Search RDF data with SPARQL</a> |
| (by Phil McCarthy) - article published on IBM developer works about |
| SPARQL and Jena.</li> |
| <li><a href="http://www.dajobe.org/2005/04-sparql/">SPARQL reference card</a> |
| (by <a href="http://www.dajobe.org/">Dave Beckett</a>)</li> |
| <li><a href="http://www.ldodds.com/blog/archives/000251.html">Parameterised Queries with SPARQL and ARQ</a> |
| (by Leigh Dodds)</li> |
| <li><a href="http://www.ldodds.com/blog/archives/000252.html">Writing an ARQ Extension Function</a> |
| (by Leigh Dodds)</li> |
| </ul> |
| <h2 id="rdf-syntax-specifications">RDF Syntax Specifications</h2> |
| <ul> |
| <li><a href="https://www.w3.org/TR/turtle/">Turtle</a></li> |
| <li><a href="https://www.w3.org/TR/n-triples">N-Triples</a></li> |
| <li><a href="https://www.w3.org/TR/trig/">TriG</a></li> |
| <li><a href="https://www.w3.org/TR/n-quads/">N-Quads</a></li> |
| </ul> |
| |
| </article> |
| |
| <aside class="text-muted align-self-start mb-3 mb-xl-5 p-0 d-none d-xl-flex flex-column sticky-top"> |
| <h2 class="h6 sticky-top m-0 p-2 bg-body-tertiary">On this page</h2> |
| <nav id="TableOfContents"> |
| <ul> |
| <li><a href="#arq-features">ARQ Features</a></li> |
| <li><a href="#introduction">Introduction</a></li> |
| <li><a href="#extensions">Extensions</a></li> |
| <li><a href="#update">Update</a></li> |
| <li><a href="#see-also">See Also</a></li> |
| <li><a href="#w3c-documents">W3C Documents</a></li> |
| <li><a href="#articles">Articles</a></li> |
| <li><a href="#rdf-syntax-specifications">RDF Syntax Specifications</a></li> |
| </ul> |
| </nav> |
| </aside> |
| </main> |
| |
| </div> |
| </div> |
| </div> |
| |
| <footer class="bd-footer py-4 py-md-5 mt-4 mt-lg-5 bg-body-tertiary"> |
| <div class="container" style="font-size:80%" > |
| <p> |
| Copyright © 2011–2024 The Apache Software Foundation, Licensed under the |
| <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>. |
| </p> |
| <p> |
| Apache Jena, Jena, the Apache Jena project logo, Apache and the Apache feather logos are trademarks of |
| The Apache Software Foundation. |
| <br/> |
| <a href="https://privacy.apache.org/policies/privacy-policy-public.html" |
| >Apache Software Foundation Privacy Policy</a>. |
| </p> |
| </div> |
| </footer> |
| |
| <script src="/js/popper.min.js.js" type="text/javascript"></script> |
| <script src="/js/bootstrap.min.js" type="text/javascript"></script> |
| <script src="/js/improve.js" type="text/javascript"></script> |
| |
| <script type="text/javascript"> |
| (function() { |
| 'use strict' |
| |
| |
| |
| const links = document.querySelectorAll(`a[href="${window.location.pathname}"]`) |
| if (links !== undefined && links !== null) { |
| for (const link of links) { |
| |
| link.classList.add('active') |
| let parentElement = link.parentElement |
| let count = 0 |
| const levelsLimit = 4 |
| |
| |
| |
| |
| |
| while (['UL', 'LI'].includes(parentElement.tagName) && count <= levelsLimit) { |
| if (parentElement.tagName === 'LI') { |
| |
| |
| |
| parentElement.querySelector('a:first-child').classList.add('active') |
| } |
| parentElement = parentElement.parentElement |
| count++ |
| } |
| } |
| } |
| })() |
| </script> |
| |
| </body> |
| </html> |
