# ChunkingConfiguration
<a name="API_agent_ChunkingConfiguration"></a>

Details about how to chunk the documents in the data source. A *chunk* refers to an excerpt from a data source that is returned when the knowledge base that it belongs to is queried.

## Contents
<a name="API_agent_ChunkingConfiguration_Contents"></a>

 ** chunkingStrategy **   <a name="bedrock-Type-agent_ChunkingConfiguration-chunkingStrategy"></a>
Knowledge base can split your source data into chunks. A *chunk* refers to an excerpt from a data source that is returned when the knowledge base that it belongs to is queried. You have the following options for chunking your data. If you opt for `NONE`, then you may want to pre-process your files by splitting them up such that each file corresponds to a chunk.  
+  `FIXED_SIZE` – Amazon Bedrock splits your source data into chunks of the approximate size that you set in the `fixedSizeChunkingConfiguration`.
+  `HIERARCHICAL` – Split documents into layers of chunks where the first layer contains large chunks, and the second layer contains smaller chunks derived from the first layer.
+  `SEMANTIC` – Split documents into chunks based on groups of similar content derived with natural language processing.
+  `NONE` – Amazon Bedrock treats each file as one chunk. If you choose this option, you may want to pre-process your documents by splitting them into separate files.
Type: String  
Valid Values: `FIXED_SIZE | NONE | HIERARCHICAL | SEMANTIC`   
Required: Yes

 ** fixedSizeChunkingConfiguration **   <a name="bedrock-Type-agent_ChunkingConfiguration-fixedSizeChunkingConfiguration"></a>
Configurations for when you choose fixed-size chunking. If you set the `chunkingStrategy` as `NONE`, exclude this field.  
Type: [FixedSizeChunkingConfiguration](API_agent_FixedSizeChunkingConfiguration.md) object  
Required: No

 ** hierarchicalChunkingConfiguration **   <a name="bedrock-Type-agent_ChunkingConfiguration-hierarchicalChunkingConfiguration"></a>
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.  
Type: [HierarchicalChunkingConfiguration](API_agent_HierarchicalChunkingConfiguration.md) object  
Required: No

 ** semanticChunkingConfiguration **   <a name="bedrock-Type-agent_ChunkingConfiguration-semanticChunkingConfiguration"></a>
Settings for semantic document chunking for a data source. Semantic chunking splits a document into into smaller documents based on groups of similar content derived from the text with natural language processing.  
Type: [SemanticChunkingConfiguration](API_agent_SemanticChunkingConfiguration.md) object  
Required: No

## See Also
<a name="API_agent_ChunkingConfiguration_SeeAlso"></a>

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/bedrock-agent-2023-06-05/ChunkingConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-agent-2023-06-05/ChunkingConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-agent-2023-06-05/ChunkingConfiguration)