# MetadataConfiguration
<a name="API_S3VectorBuckets_MetadataConfiguration"></a>

The metadata configuration for a vector index.

## Contents
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 ** nonFilterableMetadataKeys **   <a name="AmazonS3-Type-S3VectorBuckets_MetadataConfiguration-nonFilterableMetadataKeys"></a>
Non-filterable metadata keys allow you to enrich vectors with additional context during storage and retrieval. Unlike default metadata keys, these keys can’t be used as query filters. Non-filterable metadata keys can be retrieved but can’t be searched, queried, or filtered. You can access non-filterable metadata keys of your vectors after finding the vectors. For more information about non-filterable metadata keys, see [Vectors](https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-vectors-vectors.html) and [Limitations and restrictions](https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-vectors-limitations.html) in the *Amazon S3 User Guide*.   
Type: Array of strings  
Array Members: Minimum number of 1 item. Maximum number of 10 items.  
Length Constraints: Minimum length of 1. Maximum length of 63.  
Required: Yes

## See Also
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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/s3vectors-2025-07-15/MetadataConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3vectors-2025-07-15/MetadataConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/s3vectors-2025-07-15/MetadataConfiguration)