# MappingRule
<a name="API_MappingRule"></a>

A single mapping entry for each supported specifier or sub-field.

## Contents
<a name="API_MappingRule_Contents"></a>

 ** specifier **   <a name="rolesanywhere-Type-MappingRule-specifier"></a>
Specifier within a certificate field, such as CN, OU, or UID from the Subject field.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 60.  
Required: Yes

## See Also
<a name="API_MappingRule_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/rolesanywhere-2018-05-10/MappingRule) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/rolesanywhere-2018-05-10/MappingRule) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/rolesanywhere-2018-05-10/MappingRule) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for IAM Roles Anywhere. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query rolesanywhere` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).