# Search for concepts with concrete domain values by ECL query

{% hint style="success" %}
**Finding concepts with concrete domain values**<br>

Existing concepts containing attributes with concrete domain values can be found by searching with an ECL query containing a concrete domain value refinement:<br>

For instance, this ECL query returns all concepts that have an attribute with the concrete value 12.5:\
`* : * = #12.5`<br>

This query returns all concepts that have an attribute with a concrete value greater than zero:\
`* : * > #0`
{% endhint %}

| Steps                                                                                                                                                                                                                                                                                                                       | References                                                                                                                                                                                             |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| In the *Task - Search - ECL Search* context panel tab, enter an ECL expression which includes a concrete value reference into the `Search Query` box.                                                                                                                                                                       | <div><figure><img src="/files/4GjdsAZ1eq5SFtDQjgIC" alt=""><figcaption></figcaption></figure></div>                                                                                                    |
| <p>Press the blue <code>Search</code> <i class="fa-magnifying-glass">:magnifying-glass:</i> action button to the right of the<code>Search Query</code> box.<br></p><p>The <em>Search Results Panel</em> shows a <code>Searching...</code> notification until the results are collated.</p>                                  | <div><figure><img src="/files/HrhJnUt3HUjBSISbiY8C" alt=""><figcaption></figcaption></figure></div><div><figure><img src="/files/WGlzIalEF6THETVxRdfI" alt=""><figcaption></figcaption></figure></div> |
| <p>The <em>Search Results Panel</em> lists the concepts matching the ECL query.<br></p><p>Follow up actions can include:<br></p><ul><li><a href="/pages/XvrhZN43IJ31c6Pzj65m">Act on concept search results</a></li><li><a href="/pages/vkWlg5cBea7WEshoMoPz">Work with large concept search results sets</a><br></li></ul> | <div><figure><img src="/files/jc4kgIb07IqxYz6cX5qF" alt=""><figcaption></figcaption></figure></div><div><figure><img src="/files/RM4msabIfso6cBquJkB7" alt=""><figcaption></figcaption></figure></div> |

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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.snomed.org/snomed-ct-user-guides/authoring-user-guide/how-to/task-taxonomy-and-concept-search/search-for-concepts-with-concrete-domain-values-by-ecl-query.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.