Amazon Cloud Directory will no longer be open to new customers starting on November 7, 2025. For alternatives to Cloud Directory, explore [Amazon DynamoDB](https://aws.amazon.com/dynamodb/) and [Amazon Neptune](https://aws.amazon.com/neptune/). If you need help choosing the right alternative for your use case, or for any other questions, contact [AWS Support](https://aws.amazon.com/support/).

# AttributeKey


A unique identifier for an attribute.

## Contents


 ** FacetName **   <a name="amazoncds-Type-AttributeKey-FacetName"></a>
The name of the facet that the attribute exists within.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `^[a-zA-Z0-9._-]*$`   
Required: Yes

 ** Name **   <a name="amazoncds-Type-AttributeKey-Name"></a>
The name of the attribute.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 230.  
Pattern: `^[a-zA-Z0-9._:-]*$`   
Required: Yes

 ** SchemaArn **   <a name="amazoncds-Type-AttributeKey-SchemaArn"></a>
The Amazon Resource Name (ARN) of the schema that contains the facet and attribute.  
Type: String  
Required: Yes

## See Also


For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/clouddirectory-2017-01-11/AttributeKey) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/clouddirectory-2017-01-11/AttributeKey) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/clouddirectory-2017-01-11/AttributeKey)