# AWS::XRay::SamplingRule SamplingRule Attributes

Matches attributes derived from the request.

## Syntax

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

### JSON

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

### YAML

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

## Properties

#### \.{1,}

_Required_: No

_Type_: String

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