https://comunica.dev/

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1</head><body><nav><div><a href="/"><img src="/img/comunica_white.svg" class="nav-icon" alt="Comunica logo"/></a><a href="#" class="toggle-nav"><img src="/img/navigation-toggle.svg" alt="Toggle navigation bar"/></a><pagefind-modal-trigger compact=""></pagefind-modal-trigger></div><ul><li><a href="https://query.comunica.dev/">Try live</a></li><li><a href="/docs/">Docs</a></li><li><a href="/blog/">Blog</a></li><li><a href="/about/">About</a></li><li><a href="/ask/">Ask</a></li><li><a href="/research/">Research</a></li><li><a href="/events/">Events</a></li><li><a href="/association/">Association</a></li><li><a href="https://github.com/comunica/comunica">GitHub</a></li><li class="nav-search-desktop"><pagefind-modal-trigger placeholder="Search…"></pagefind-modal-trigger></li></ul></nav><div class="nav-pusher"></div><pagefind-modal reset-on-close=""></pagefind-modal><div id="__next"><div class="container"><main id="software"><div class="intro"><img src="/img/comunica_red_no_fill.svg" alt="Comunica" class="comunica-logo"/><h1 class="title">A knowledge graph querying framework</h1></div><p class="description">Flexible SPARQL and GraphQL over decentralized RDF on the Web.</p><div class="grid-wide live-demo-row"><div class="live-demo"><div class="live-demo-header"><label class="live-demo-presets">Example<select><option value="acquaintances" selected="">Mutual acquaintances of three people</option><option value="interests">Common interests of two people</option><option value="bradpitt">Directors of movies starring Brad Pitt</option></select></label><span class="live-demo-links"><a href="https://query.comunica.dev/#query=PREFIX%20foaf%3A%20%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0APREFIX%20schema%3A%20%3Chttps%3A%2F%2Fschema.org%2F%3E%0ASELECT%20DISTINCT%20%3Fperson%20%3Fname%20WHERE%20%7B%0A%20%20%3Chttps%3A%2F%2Fwww.rubensworks.net%2F%23me%3E%20foaf%3Aknows%20%3Fperson.%0A%20%20%3Chttps%3A%2F%2Fpietercolpaert.be%2F%23me%3E%20%28foaf%3Aknows%7Cschema%3Acolleague%29%20%3Fperson.%0A%20%20%3Chttps%3A%2F%2Fruben.verborgh.org%2Fprofile%2F%23me%3E%20foaf%3Aknows%20%3Fperson.%0A%20%20%3Fperson%20foaf%3Aname%20%3Fname.%0A%20%20FILTER%28LANG%28%3Fname%29%20%3D%20%22%22%29%0A%7D&amp;datasources=https%3A%2F%2Fwww.rubensworks.net%2F;https%3A%2F%2Fpietercolpaert.be%2F;https%3A%2F%2Fdata.verborgh.org%2Fruben">Try more live queries →</a></span></div><div class="live-demo-editor"><pre class="live-demo-highlight" aria-hidden="true"><span class="sparql-keyword">PREFIX</span> <span class="sparql-prefixed">foaf:</span> <span class="sparql-iri">&lt;http://xmlns.com/foaf/0.1/&gt;</span>
2<span class="sparql-keyword">PREFIX</span> <span class="sparql-prefixed">schema:</span> <span class="sparql-iri">&lt;https://schema.org/&gt;</span>
3<span class="sparql-keyword">SELECT</span> <span class="sparql-keyword">DISTINCT</span> <span class="sparql-variable">?person</span> <span class="sparql-variable">?name</span> <span class="sparql-keyword">WHERE</span> {
4  <span class="sparql-iri">&lt;https://www.rubensworks.net/#me&gt;</span> <span class="sparql-prefixed">foaf:knows</span> <span class="sparql-variable">?person</span>.
5  <span class="sparql-iri">&lt;https://pietercolpaert.be/#me&gt;</span> (<span class="sparql-prefixed">foaf:knows</span>|<span class="sparql-prefixed">schema:colleague</span>) <span class="sparql-variable">?person</span>.
6  <span class="sparql-iri">&lt;https://ruben.verborgh.org/profile/#me&gt;</span> <span class="sparql-prefixed">foaf:knows</span> <span class="sparql-variable">?person</span>.
7  <span class="sparql-variable">?person</span> <span class="sparql-prefixed">foaf:name</span> <span class="sparql-variable">?name</span>.
8  <span class="sparql-keyword">FILTER</span>(<span class="sparql-keyword">LANG</span>(<span class="sparql-variable">?name</span>) = <span class="sparql-string">&quot;&quot;</span>)
9}<!-- -->
10</pre><textarea class="live-demo-query" aria-label="SPARQL query" spellcheck="false">PREFIX foaf: &lt;http://xmlns.com/foaf/0.1/&gt;
11PREFIX schema: &lt;https://schema.org/&gt;
12SELECT DISTINCT ?person ?name WHERE {
13  &lt;https://www.rubensworks.net/#me&gt; foaf:knows ?person.
14  &lt;https://pietercolpaert.be/#me&gt; (foaf:knows|schema:colleague) ?person.
15  &lt;https://ruben.verborgh.org/profile/#me&gt; foaf:knows ?person.
16  ?person foaf:name ?name.
17  FILTER(LANG(?name) = &quot;&quot;)
18}</textarea></div><div class="live-demo-sources"><span class="live-demo-sources-label">Sources</span><span class="live-demo-source"><span class="live-demo-source-type">RDFa</span>https://www.rubensworks.net/<button type="button" title="Remove this source">×</button></span><span class="live-demo-source"><span class="live-demo-source-type">JSON-LD</span>https://pietercolpaert.be/<button type="button" title="Remove this source">×</button></span><span class="live-demo-source"><span class="live-demo-source-type">TPF</span>https://data.verborgh.org/ruben<button type="button" title="Remove this source">×</button></span><form><input type="text" class="live-demo-source-add" placeholder="+ Add a source URL" spellcheck="false" value=""/></form></div><div class="live-demo-actions"><button class="live-demo-run">▶ Run query</button><span class="live-demo-status">Loading the query engine…</span></div></div></div><section class="home-section features"><p class="home-overline">Why Comunica</p><div class="features-grid"><a href="/docs/query/getting_started/query_app/" class="feature"><span class="feature-badge"><span class="feature-glyph" style="--icon:url(/img/web.svg)"></span></span><h3>For the Web</h3><p>Powered by Web technologies, execute queries via JavaScript on server or client.</p><span class="feature-link">Learn more →</span></a><a href="docs/query/advanced/federation/" class="feature"><span class="feature-badge"><span class="feature-glyph" style="--icon:url(/img/sources.svg)"></span></span><h3>Decentralized</h3><p>Execute federated queries over multiple heterogeneous data sources across the Web.</p><span class="feature-link">Learn more →</span></a><a href="docs/modify/" class="feature"><span class="feature-badge"><span class="feature-glyph" style="--icon:url(/img/modular.svg)"></span></span><h3>Modular</h3><p>A collection of modules that can be combined to achieve a certain task.</p><span class="feature-link">Learn more →</span></a></div></section><section class="home-section"><p class="home-overline">Get started</p><div class="tiles"><a href="docs/query/" class="tile"><h3>Query with Comunica →</h3><p>Execute your first query</p></a><a href="docs/modify/" class="tile"><h3>Modify Comunica →</h3><p>Configure or extend it</p></a><a href="docs/query/advanced/solid" class="tile"><h3>Query Solid pods →</h3><p>Query data in Solid pods</p></a><a href="docs/query/advanced/mcp/" class="tile"><h3>Comunica MCP →</h3><p>Use it from AI agents</p></a><a href="https://opencollective.com/comunica-association" class="tile"><h3>Donate →</h3><p>Sponsor on Open Collective</p></a><a href="contribute/" class="tile"><h3>Contribute →</h3><p>Help with development</p></a></div></section><section class="home-section"><p class="home-overline">Used by</p><p class="home-lead">Production-ready, and <a href="/docs/query/usage/">widely used in commercial, governmental, and academic contexts</a>.</p><div class="stats"><a href="https://github.com/comunica/comunica/network/dependents" class="stat"><strong>1.600<!-- -->+</strong><span>dependents on GitHub</span></a><a href="https://www.npmjs.com/package/@comunica/core" class="stat"><strong>400.000<!-- -->+</strong><span>monthly npm downloads</span></a><a href="/docs/modify/advanced/buses/" class="stat"><strong>300<!-- -->+</strong><span>core framework modules</span></a></div></section><section class="home-section"><p class="home-overline">Supported by</p><p class="home-lead">Comunica is a community-driven project, sustained by the <a href="/association/">Comunica Association</a>. If you are using Comunica, <a href="https://opencollective.com/comunica-association">becoming a sponsor or member</a> is a way to make Comunica sustainable in the long-term.</p><div class="sponsor-panel"><div class="sponsor-tier"><h3>Board members</h3><p>Directly contributing, or donating € 2500 / month</p><div class="sponsor-logos sponsor-logos-member"><a href="https://www.ugent.be/ea/idlab/en"><img src="img/members/idlab.png" alt="IDLab - Internet Technology and Data Science Lab"/></a></div></div><div class="sponsor-tier"><h3>Bronze sponsors</h3><p>Donating € 250 / month</p><div class="sponsor-logos sponsor-logos-bronze"><a href="https://netwerkdigitaalerfgoed.nl/"><img src="https://user-images.githubusercontent.com/440384/134636829-f730230c-bfec-4d40-86d1-67f28479cdcc.png" alt="Netwerk Digitaal Erfgoed"/></a></div></div></div></section></main></div></div><footer>©2018 – <!-- -->2026<!-- --> <a href="http://www.ugent.be/">Ghent University</a> – <a href="http://www.imec.be/">imec</a>, Belgium<br/><a href="https://github.com/comunica/website">Source of this website</a></footer>

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