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<!DOCTYPE html>
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<title> Policies service • Eclipse Ditto™ • a digital twin framework</title>
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<li><a href="release_notes_362.html">3.6.2</a></li>
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<li><a href="release_notes_3512.html">3.5.12</a></li>
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<li><a href="release_notes_357.html">3.5.7</a></li>
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<li><a href="release_notes_345.html">3.4.5</a></li>
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<li><a href="release_notes_340.html">3.4.0</a></li>
<li><a href="release_notes_337.html">3.3.7</a></li>
<li><a href="release_notes_336.html">3.3.6</a></li>
<li><a href="release_notes_335.html">3.3.5</a></li>
<li><a href="release_notes_334.html">3.3.4</a></li>
<li><a href="release_notes_333.html">3.3.3</a></li>
<li><a href="release_notes_332.html">3.3.2</a></li>
<li><a href="release_notes_330.html">3.3.0</a></li>
<li><a href="release_notes_321.html">3.2.1</a></li>
<li><a href="release_notes_320.html">3.2.0</a></li>
<li><a href="release_notes_312.html">3.1.2</a></li>
<li><a href="release_notes_311.html">3.1.1</a></li>
<li><a href="release_notes_310.html">3.1.0</a></li>
<li><a href="release_notes_300.html">3.0.0</a></li>
<li><a href="release_notes_242.html">2.4.2</a></li>
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<a href="#"><span></span>Basic concepts</a>
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<a href="#"><span></span>Model entities</a>
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<li><a href="basic-policy.html">Policy</a></li>
<li><a href="basic-namespaces-and-names.html">Namespaces and Names</a></li>
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<a href="#"><span></span>Checking Permissions for Resources</a>
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<a href="#"><span></span>Signal types</a>
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<li><a href="basic-signals-announcement.html">Announcement</a></li>
<li><a href="basic-enrichment.html">Signal enrichment</a></li>
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<li><a href="basic-apis.html">APIs</a></li>
<li><a href="basic-connections.html">Connections</a></li>
<li><a href="basic-placeholders.html">Placeholders</a></li>
<li><a href="basic-changenotifications.html">Change notifications</a></li>
<li><a href="basic-rql.html">RQL expressions</a></li>
<li><a href="basic-conditional-requests.html">Conditional requests</a></li>
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