# HierarchicalChunkingConfiguration
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Settings for hierarchical document chunking for a data source. Hierarchical chunking splits documents into layers of chunks where the first layer contains large chunks, and the second layer contains smaller chunks derived from the first layer.

## Contents
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 ** levelConfigurations **   <a name="connect-Type-amazon-q-connect_HierarchicalChunkingConfiguration-levelConfigurations"></a>
Token settings for each layer.  
Type: Array of [HierarchicalChunkingLevelConfiguration](API_amazon-q-connect_HierarchicalChunkingLevelConfiguration.md) objects  
Array Members: Fixed number of 2 items.  
Required: Yes

 ** overlapTokens **   <a name="connect-Type-amazon-q-connect_HierarchicalChunkingConfiguration-overlapTokens"></a>
The number of tokens to repeat across chunks in the same layer.  
Type: Integer  
Valid Range: Minimum value of 1.  
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/qconnect-2020-10-19/HierarchicalChunkingConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/qconnect-2020-10-19/HierarchicalChunkingConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/qconnect-2020-10-19/HierarchicalChunkingConfiguration)