devdocs/html/global_attributes%2Fitemref.html


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<header><h1>itemref</h1></header><div class="section-content">
<p>Properties that are not descendants of an element with the <a href="itemscope"><code>itemscope</code></a> attribute can be associated with an item using the <a href="../global_attributes">global attribute</a> <code>itemref</code>.</p> <p><code>itemref</code> provides a list of element IDs (not <code>itemid</code>s) elsewhere in the document, with additional properties</p> <p>The <code>itemref</code> attribute can only be specified on elements that have an <code>itemscope</code> attribute specified.</p> <div class="notecard note" id="sect1"> <p><strong>Note:</strong> The <code>itemref</code> attribute is not part of the microdata data model. It is merely a syntactic construct to aid authors in adding annotations to pages where the data to be annotated does not follow a convenient tree structure. For example, it allows authors to mark up data in a table so that each column defines a separate item while keeping the properties in the cells.</p> </div>
</div>
<h2 id="examples">Examples</h2>

<h3 id="representing_structured_data_for_a_band">Representing structured data for a band</h3>
<div class="section-content">
<p>This example uses microdata attributes to represent the following structured data (in <a href="https://json-ld.org/" target="_blank">JSON-LD</a> format):</p> <div class="code-example">
<p class="example-header"><span class="language-name">json</span></p>
<pre data-signature="5jNQMtf3O3MRZQx7fZ9yYG5u9+qWyZHWHMU1biaoWz0=" data-language="json"><span class="token punctuation">{</span>
  <span class="token property">"@id"</span><span class="token operator">:</span> <span class="token string">"amanda"</span><span class="token punctuation">,</span>
  <span class="token property">"name"</span><span class="token operator">:</span> <span class="token string">"Amanda"</span><span class="token punctuation">,</span>
  <span class="token property">"band"</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token property">"@id"</span><span class="token operator">:</span> <span class="token string">"b"</span><span class="token punctuation">,</span>
    <span class="token property">"name"</span><span class="token operator">:</span> <span class="token string">"Jazz Band"</span><span class="token punctuation">,</span>
    <span class="token property">"size"</span><span class="token operator">:</span> <span class="token number">12</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</pre>
</div> <h4 id="html">HTML</h4> <div class="code-example">
<p class="example-header"><span class="language-name">html</span></p>
<pre data-signature="EBplAOAbZOTJ5Lh3KSWI2ONHEuuszvP29DjQ2DF8giI=" data-language="html"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">itemscope</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>amanda<span class="token punctuation">"</span></span> <span class="token attr-name">itemref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>a b<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>a<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Name: <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">itemprop</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Amanda<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>b<span class="token punctuation">"</span></span> <span class="token attr-name">itemprop</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>band<span class="token punctuation">"</span></span> <span class="token attr-name">itemscope</span> <span class="token attr-name">itemref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">&gt;</span></span>Band: <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">itemprop</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>Jazz Band<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>p</span><span class="token punctuation">&gt;</span></span>Size: <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>span</span> <span class="token attr-name">itemprop</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>size<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>12<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>span</span><span class="token punctuation">&gt;</span></span> players<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>p</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
</pre>
</div> <h4 id="result">Result</h4>
<div class="code-example" id="sect2">

<iframe class="sample-code-frame" title="Representing structured data for a band sample" id="frame_representing_structured_data_for_a_band" src="https://live.mdnplay.dev/en-US/docs/Web/HTML/Global_attributes/itemref/runner.html?id=representing_structured_data_for_a_band" loading="lazy"></iframe>
</div>
</div>
<h2 id="specifications">Specifications</h2>
<div class="_table"><table class="standard-table">
<thead><tr><th scope="col">Specification</th></tr></thead>
<tbody><tr><td><a href="https://html.spec.whatwg.org/multipage/microdata.html#attr-itemref">HTML Standard <br><small># attr-itemref</small></a></td></tr></tbody>
</table></div>
<h2 id="browser_compatibility">Browser compatibility</h2>
<div class="_table"><table>
<thead>
<tr id="bct-browser-type">
<th></th>
<th colspan="6">Desktop</th>
<th colspan="6">Mobile</th>
</tr>
<tr id="bct-browsers">
<th></th>
<th>Chrome</th>
<th>Edge</th>
<th>Firefox</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
<th>WebView Android</th>
<th>Chrome Android</th>
<th>Firefox for Android</th>
<th>Opera Android</th>
<th>Safari on IOS</th>
<th>Samsung Internet</th>
</tr>
</thead>
<tbody><tr>
<th><code>itemref</code></th>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">12</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
<td class="bc-supports-yes">Yes</td>
</tr></tbody>
</table></div>
<h2 id="see_also">See also</h2>
<div class="section-content"><ul> <li><a href="../global_attributes">Other different global attributes</a></li> <li>Other microdata related global attributes: <ul> <li><a href="itemid"><code>itemid</code></a></li> <li><a href="itemprop"><code>itemprop</code></a></li> <li><a href="itemscope"><code>itemscope</code></a></li> <li><a href="itemtype"><code>itemtype</code></a></li> </ul> </li> </ul></div><div class="_attribution">
  <p class="_attribution-p">
    &copy; 2005&ndash;2023 MDN contributors.<br>Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.<br>
    <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/itemref" class="_attribution-link">https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/itemref</a>
  </p>
</div>