# AWS::SSM::Association Parameters

Parameter values that the SSM document uses at runtime.

## Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

### JSON

<pre>
{
    "<a href="#.*{1,255}" title=".*{1,255}">.*{1,255}</a>" : <i>[ String, ... ]</i>
}
</pre>

### YAML

<pre>
<a href="#.*{1,255}" title=".*{1,255}">.*{1,255}</a>: <i>
      - String</i>
</pre>

## Properties

#### \.*{1,255}

_Required_: No

_Type_: List of String

_Update requires_: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)