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

# AWS::CUR::ReportDefinition Tag
<a name="aws-properties-cur-reportdefinition-tag"></a>

Describes a tag. A tag is a key-value pair. You can add up to 50 tags to a report definition.

## Syntax
<a name="aws-properties-cur-reportdefinition-tag-syntax"></a>

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

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

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

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

```
  [Key](#cfn-cur-reportdefinition-tag-key): {{String}}
  [Value](#cfn-cur-reportdefinition-tag-value): {{String}}
```

## Properties
<a name="aws-properties-cur-reportdefinition-tag-properties"></a>

`Key`  <a name="cfn-cur-reportdefinition-tag-key"></a>
The key of the tag. Tag keys are case sensitive. Each report definition can only have up to one tag with the same key. If you try to add an existing tag with the same key, the existing tag value will be updated to the new value.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `128`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-cur-reportdefinition-tag-value"></a>
The value of the tag. Tag values are case-sensitive. This can be an empty string.  
*Required*: Yes  
*Type*: String  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)