# DocumentAttribute


A document attribute or metadata field. To create custom document attributes, see [Custom attributes](https://docs.aws.amazon.com/kendra/latest/dg/custom-attributes.html).

## Contents


 ** Key **   <a name="kendra-Type-DocumentAttribute-Key"></a>
The identifier for the attribute.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 200.  
Pattern: `[a-zA-Z0-9_][a-zA-Z0-9_-]*`   
Required: Yes

 ** Value **   <a name="kendra-Type-DocumentAttribute-Value"></a>
The value of the attribute.  
Type: [DocumentAttributeValue](API_DocumentAttributeValue.md) object  
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/kendra-2019-02-03/DocumentAttribute) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/kendra-2019-02-03/DocumentAttribute) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/kendra-2019-02-03/DocumentAttribute)