# VectorAttributeDefinition
<a name="API_VectorAttributeDefinition"></a>

The definition of a vector attribute for a vector index.

## Contents
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**Note**  
In the following list, the required parameters are described first.

 ** AttributeName **   <a name="DDB-Type-VectorAttributeDefinition-AttributeName"></a>
The name of the vector attribute.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Required: Yes

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/dynamodb-2012-08-10/VectorAttributeDefinition) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/dynamodb-2012-08-10/VectorAttributeDefinition) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/dynamodb-2012-08-10/VectorAttributeDefinition)