This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::Macie::CustomDataIdentifier Tag
<a name="aws-properties-macie-customdataidentifier-tag"></a>

Specifies a tag (key-value pair) to apply to a custom data identifier. A *tag* is a label that you can define and associate with AWS resources, including certain types of Amazon Macie resources. Each tag consists of a *tag key* and an associated *tag value*. A *tag key* is a general label that acts as a category for a more specific tag value. Each tag key must be unique and it can have only one tag value. A *tag value* acts as a descriptor for a tag key. Tag keys and values are case sensitive. They can contain letters, numbers, spaces, or the following symbols: \$1 . : / = \$1 - @

For more information, see [Tagging Macie resources](https://docs.aws.amazon.com/macie/latest/user/tagging-resources.html) in the *Amazon Macie User Guide*.

## Syntax
<a name="aws-properties-macie-customdataidentifier-tag-syntax"></a>

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

### JSON
<a name="aws-properties-macie-customdataidentifier-tag-syntax.json"></a>

```
{
  "[Key](#cfn-macie-customdataidentifier-tag-key)" : String,
  "[Value](#cfn-macie-customdataidentifier-tag-value)" : String
}
```

### YAML
<a name="aws-properties-macie-customdataidentifier-tag-syntax.yaml"></a>

```
  [Key](#cfn-macie-customdataidentifier-tag-key): String
  [Value](#cfn-macie-customdataidentifier-tag-value): String
```

## Properties
<a name="aws-properties-macie-customdataidentifier-tag-properties"></a>

`Key`  <a name="cfn-macie-customdataidentifier-tag-key"></a>
The name of the tag key. A tag key can contain up to 128 UTF-8 characters.  
*Required*: Yes  
*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`  <a name="cfn-macie-customdataidentifier-tag-value"></a>
The tag value to associate with the specified tag key (`Key`). A tag value can contain up to 256 UTF-8 characters. A tag value cannot be null, but it can be an empty string.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)