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<li><span class="section-nav-list-main-title">Languages</span></li>

<li>
  <span class="section-nav-list-title">Java</span>
  <ul class="section-nav-list">
    <li><a href="{{ site.baseurl }}/documentation/sdks/java/">Java SDK overview</a></li>
    <li><a href="https://beam.apache.org/releases/javadoc/{{ site.release_latest }}/" target="_blank">Java SDK API reference <img src="{{ site.baseurl }}/images/external-link-icon.png"
                                                                                                                                   width="14" height="14"
                                                                                                                                   alt="External link."></a>
    </li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/java-dependencies/">Java SDK dependencies</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/java-extensions/">Java SDK extensions</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/java-thirdparty/">Java 3rd party extensions</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/java/testing/nexmark/">Nexmark benchmark suite</a></li>
  </ul>
</li>

<li>
  <span class="section-nav-list-title">Python</span>
  <ul class="section-nav-list">
    <li><a href="{{ site.baseurl }}/documentation/sdks/python/">Python SDK overview</a></li>
    <li><a href="https://beam.apache.org/releases/pydoc/{{ site.release_latest }}/" target="_blank">Python SDK API reference <img src="{{ site.baseurl }}/images/external-link-icon.png"
                                                                                                                                   width="14" height="14"
                                                                                                                                   alt="External link."></a>
    </li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/python-dependencies/">Python SDK dependencies</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/python-streaming/">Python streaming pipelines</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/python-type-safety/">Ensuring Python type safety</a></li>
    <li><a href="{{ site.baseurl }}/documentation/sdks/python-pipeline-dependencies/">Managing pipeline dependencies</a></li>
  </ul>
</li>

<li>
  <span class="section-nav-list-title">Go</span>
  <ul class="section-nav-list">
    <li><a href="{{ site.baseurl }}/documentation/sdks/go/">Go SDK overview</a></li>
    <li><a href="https://godoc.org/github.com/apache/beam/sdks/go/pkg/beam" target="_blank">Go SDK API reference <img src="{{ site.baseurl }}/images/external-link-icon.png"
                                                                                                                                   width="14" height="14"
                                                                                                                                   alt="External link."></a>
    </li>
  </ul>
</li>

<li>
  <span class="section-nav-list-title">SQL</span>
  <ul class="section-nav-list">
    <li><a href="{{ site.baseurl }}/documentation/dsls/sql/overview/">Overview</a></li>
    <li><a href="{{ site.baseurl }}/documentation/dsls/sql/walkthrough/">Walkthrough</a></li>
    <li><a href="{{ site.baseurl }}/documentation/dsls/sql/shell/">Shell</a></li>
    <li class="section-nav-item--collapsible">
      <span class="section-nav-list-title">Apache Calcite dialect</span>

      <ul class="section-nav-list">
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/overview/">Calcite support overview</a></li>  
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/query-syntax/">Query syntax</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/lexical/">Lexical structure</a></li>        
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/data-types/">Data types</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/scalar-functions/">Scalar functions</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/calcite/aggregate-functions/">Aggregate functions</a></li>
      </ul>
    </li>
    <li class="section-nav-item--collapsible">
      <span class="section-nav-list-title">ZetaSQL dialect</span>

      <ul class="section-nav-list">
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/overview/">ZetaSQL support overview</a></li>          
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/syntax/">Function call rules</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/conversion-rules/">Conversion rules</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/query-syntax/">Query syntax</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/lexical/">Lexical structure</a></li>        
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/data-types/">Data types</a></li>             
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/operators/">Operators</a></li>

        <li class="section-nav-item--collapsible">
          <span class="section-nav-list-title">Scalar functions</span>
          <ul class="section-nav-list">
            <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/string-functions/">String functions</a></li>
            <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/math-functions/">Mathematical functions</a></li>
            <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/conditional-expressions/">Conditional expressions</a></li>
          </ul>
        </li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/zetasql/aggregate-functions/">Aggregate functions</a></li>
      </ul>
    </li>
    <li class="section-nav-item--collapsible">
      <span class="section-nav-list-title">Beam SQL extensions</span>

      <ul class="section-nav-list">
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/extensions/create-external-table/">CREATE EXTERNAL TABLE</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/extensions/windowing-and-triggering/">Windowing & triggering</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/extensions/joins/">Joins</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/extensions/user-defined-functions/">User-defined functions</a></li>
        <li><a href="{{ site.baseurl }}/documentation/dsls/sql/extensions/set/">SET pipeline options</a></li>
      </ul>
    </li>
  </ul>
</li>
