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</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="theme-doc-markdown markdown"><h1>What is a search document?</h1><p><a href="https://en.wikipedia.org/wiki/Search_engine_indexing" target="_blank" rel="noopener noreferrer">Search documents</a> are also modeled using <a href="https://linkedin.github.io/rest.li/pdl_schema" target="_blank" rel="noopener noreferrer">PDL</a> explicitly.
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In many ways, the model for a Document is very similar to an <a href="/docs/what/entity">Entity</a> and <a href="/docs/what/relationship">Relationship</a> model,
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where each attribute/field contains a value that’s derived from various metadata aspects.
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However, a search document is also allowed to have array type of attribute that contains only primitives or enum items.
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This is because most full-text search engines supports membership testing against an array field, e.g. an array field containing all the terms used in a document.</p><p>One obvious use of the attributes is to perform search filtering, e.g. give me all the <code>User</code> whose first name or last name is similar to “Joe” and reports up to <code>userFoo</code>.
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Since the document is also served as the main interface for the search API, the attributes can also be used to format the search snippet.
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As a result, one may be tempted to add as many attributes as needed. This is acceptable as the underlying search engine is designed to index a large number of fields.</p><p>Below shows an example schema for the <code>User</code> search document. Note that:</p><ol><li>Each search document is required to have a type-specific <code>urn</code> field, generally maps to an entity in the <a href="/docs/what/graph">graph</a>.</li><li>Similar to <code>Entity</code>, each document has an optional <code>removed</code> field for "soft deletion".</li><li>Similar to <code>Entity</code>, all remaining fields are made <code>optional</code> to support partial updates.</li><li><code>management</code> shows an example of a string array field.</li><li><code>ownedDataset</code> shows an example on how a field can be derived from metadata <a href="/docs/what/aspect">aspects</a> associated with other types of entity (in this case, <code>Dataset</code>).</li></ol><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">namespace com.linkedin.metadata.search</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/**</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> * Common fields that may apply to all documents</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">record BaseDocument {</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** Whether the entity has been removed or not */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> removed: optional boolean = false</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">namespace com.linkedin.metadata.search</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">import com.linkedin.common.CorpuserUrn</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">import com.linkedin.common.DatasetUrn</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">/**</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> * Data model for user entity search</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">record UserDocument includes BaseDocument {</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** Urn for the user */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> urn: CorpuserUrn</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** First name of the user */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> firstName: optional string</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** Last name of the user */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> lastName: optional string</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** The chain of management all the way to CEO */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> management: optional array[CorpuserUrn] = []</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** Code for the cost center */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> costCenter: optional int</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> /** The list of dataset the user owns */</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ownedDatasets: optional array[DatasetUrn] = []</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" 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