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itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/docs/3.0.x/functions-develop/"><span itemprop="name">How-to: Develop</span></a><meta itemprop="position" content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Use schema registry</span><meta itemprop="position" content="3"></li></ul></nav><div class="theme-doc-markdown markdown"><header><h1>Use schema registry</h1></header><p>Pulsar has a built-in <a href="/docs/3.0.x/schema-overview/">schema registry</a> and is bundled with popular <a href="/docs/3.0.x/schema-understand/#schema-type">schema types</a>. Pulsar Functions can leverage the existing schema information from input topics and derive the input type. The schema registry applies to output topics as well.</p><p>The following table outlines the supportability of schema types in Pulsar Functions.</p><table><thead><tr><th>Schema Type</th><th>Java Function</th><th>Python Function</th><th>Go Function</th></tr></thead><tbody><tr><td>String</td><td>✅</td><td>✅</td><td></td></tr><tr><td>Avro</td><td>✅</td><td>✅</td><td></td></tr><tr><td>JSON</td><td>✅</td><td>✅</td><td></td></tr><tr><td>Protobuf</td><td>✅</td><td></td><td></td></tr><tr><td>ProtobufNative</td><td>✅</td><td></td><td></td></tr><tr><td>Key/Value</td><td>✅</td><td></td><td></td></tr><tr><td>AUTO_PRODUCE</td><td>✅</td><td></td><td></td></tr><tr><td>AUTO_CONSUME</td><td>✅</td><td></td><td></td></tr></tbody></table><p>For more code examples, see <a href="https://github.com/apache/pulsar/blob/master/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/AutoSchemaFunction.java" target="_blank" rel="noopener noreferrer">Java Functions</a> and <a 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