# AWS::EC2::TransitGatewayPeeringAttachment Tag

## Syntax

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

### JSON

<pre>
{
    "<a href="#key" title="Key">Key</a>" : <i>String</i>,
    "<a href="#value" title="Value">Value</a>" : <i>String</i>
}
</pre>

### YAML

<pre>
<a href="#key" title="Key">Key</a>: <i>String</i>
<a href="#value" title="Value">Value</a>: <i>String</i>
</pre>

## Properties

#### Key

The key of the tag. Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws:.

_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)

#### Value

The value of the tag. Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.

_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)