generative-ai-cdk-constructs

@cdklabs/generative-ai-cdk-constructs • Docs

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@cdklabs/generative-ai-cdk-constructs / bedrock / ChunkingStrategy

Class: abstract ChunkingStrategy

Properties

configuration

abstract configuration: ChunkingConfigurationProperty

The CloudFormation property representation of this configuration

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DEFAULT

readonly static DEFAULT: ChunkingStrategy

Fixed Sized Chunking with the default chunk size of 300 tokens and 20% overlap.

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FIXED_SIZE

readonly static FIXED_SIZE: ChunkingStrategy

Fixed Sized Chunking with the default chunk size of 300 tokens and 20% overlap. You can adjust these values based on your specific requirements using the ChunkingStrategy.fixedSize(params) method.

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HIERARCHICAL_COHERE

readonly static HIERARCHICAL_COHERE: ChunkingStrategy

Hierarchical Chunking with the default for Cohere Models.

• Overlap tokens: 30
• Max parent token size: 500
• Max child token size: 100

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HIERARCHICAL_TITAN

readonly static HIERARCHICAL_TITAN: ChunkingStrategy

Hierarchical Chunking with the default for Titan Models.

• Overlap tokens: 60
• Max parent token size: 1500
• Max child token size: 300

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NONE

readonly static NONE: ChunkingStrategy

Amazon Bedrock treats each file as one chunk. Suitable for documents that are already pre-processed or text split.

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SEMANTIC

readonly static SEMANTIC: ChunkingStrategy

Semantic Chunking with the default of bufferSize: 0, breakpointPercentileThreshold: 95, and maxTokens: 300. You can adjust these values based on your specific requirements using the ChunkingStrategy.semantic(params) method.

Methods

fixedSize()

static fixedSize(props): ChunkingStrategy

Method for customizing a fixed sized chunking strategy.

Parameters

• props: FixedSizeChunkingConfigurationProperty

Returns

ChunkingStrategy

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hierarchical()

static hierarchical(props): ChunkingStrategy

Method for customizing a hierarchical chunking strategy. For custom chunking, the maximum token chunk size depends on the model.

• Amazon Titan Text Embeddings: 8192
• Cohere Embed models: 512

Parameters

• props: HierarchicalChunkingProps

Returns

ChunkingStrategy

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semantic()

static semantic(props): ChunkingStrategy

Method for customizing a semantic chunking strategy. For custom chunking, the maximum token chunk size depends on the model.

• Amazon Titan Text Embeddings: 8192
• Cohere Embed models: 512

Parameters

• props: SemanticChunkingConfigurationProperty

Returns

ChunkingStrategy

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