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<h2 class="title"><a id="agg-metadata"></a>Aggregation Metadata<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.2/docs/reference/aggregations/misc.asciidoc">edit</a></h2>
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<p>You can associate a piece of metadata with individual aggregations at request time that will be returned in place
at response time.</p>
<p>Consider this example where we want to associate the color blue with our <code class="literal">terms</code> aggregation.</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">GET /twitter/_search
{
"size": 0,
"aggs": {
"titles": {
"terms": {
"field": "title"
},
"meta": {
"color": "blue"
}
}
}
}</pre>
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<div class="console_widget" data-snippet="snippets/583.console"></div>
<p>Then that piece of metadata will be returned in place for our <code class="literal">titles</code> terms aggregation</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">{
"aggregations": {
"titles": {
"meta": {
"color" : "blue"
},
"doc_count_error_upper_bound" : 0,
"sum_other_doc_count" : 0,
"buckets": [
]
}
},
...
}</pre>
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