> For the complete documentation index, see [llms.txt](https://docs.wem.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wem.io/platform/wemreference/keywords/contains.md).

# Contains

{% hint style="info" %}
The `Contains` keyword can be used on either **Texts**, **Concept Sets** or **Lists**. 

It checks if a <mark style="color:blue;">text</mark>, a <mark style="color:blue;">concept set</mark> or a <mark style="color:blue;">list</mark> contains a value (of **corresponding** type).

This function is PARTIALLY SQL compatible:

* the variant `concept_set contains concept_set` is **NOT SQL compatible**

For more information about SQL compatibility, see our [documentation](/platform/wemreference/sql-compatibility.md).
{% endhint %}

{% hint style="success" %}
Returns a <mark style="color:green;">Yes/No</mark> value that indicates if the searched item is indeed part of the source being searched.
{% endhint %}

{% hint style="warning" %}
Text functions are not case-sensitive and ignore diacritics (accents).
{% endhint %}

<details>

<summary><mark style="color:blue;"><code>text</code></mark><code> contains </code><mark style="color:blue;"><code>text</code></mark></summary>

`"With tangerine trees and marmalade skies" Contains "marmalade"`\
\&#xNAN;*=> Yes*

</details>

<details>

<summary><mark style="color:blue;"><code>concept_set</code></mark><code> contains </code><mark style="color:blue;"><code>concept_b</code></mark></summary>

`{ 'PowerUser', 'Administrator' } Contains 'Administrator'`\
\&#xNAN;*=> Yes*

</details>

<details>

<summary><mark style="color:blue;"><code>concept_set</code></mark><code> contains </code><mark style="color:blue;"><code>concept_set</code></mark></summary>

{ `'User', 'PowerUser', 'Admin' } contains { 'User', 'Admin' }`\
\&#xNAN;*=> Yes*

{ `'PowerUser', 'Admin' } contains { 'User', 'PowerUser' }`\
\&#xNAN;*=> No (the second set is not contained entirely within the first set, although there is overlap - which is a different keyword/function)*

*This variant will always have to be executed outside SQL context - it is not SQL compatible.*

</details>

<details>

<summary><mark style="color:blue;"><code>list</code></mark><code> contains </code><mark style="color:blue;"><code>item</code></mark></summary>

`list(1, 2, 3) contains 2`\
\&#xNAN;*=> Yes*

`list("A", "B", "C") contains "B"`\
\&#xNAN;*=> Yes*

</details>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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.wem.io/platform/wemreference/keywords/contains.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.