(bedrock): bedrock.ChunkingStrategy.SEMANTIC is not implemented

[grrapport]

Describe the feature

Add support for ChunkingStrategy SEMANTIC as described here

Use Case

I want to use the SEMANTIC chunking strategy for a KnowledgeBase

Proposed Solution

Add value for SEMANTIC to relevant files.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

[krokoko]

Hi @grrapport , thank you for this feature request ! I just started testing the 2 new chunking strategies, however when you try to deploy a template with either SEMANTIC or HIERARCHICAL you get an error like: 'HIERARCHICAL is not a valid enum value'. I will verify with the CloudFormation team if this is a bug and update this ticket accordingly.

[grrapport]

Thank you, I was tinkering with it on my side too and having some problems with CFN as well.

[krokoko]

Hi @grrapport , I heard back from the team and this is an error in the documentation. Those new chunking strategies are not supported yet in CloudFormation. I will close this ticket and re-open it when the feature is available to link it to the PR.

[krokoko]

Hi @grrapport , just FYI the support has been added and deployed in cfn (https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-bedrock-datasource-chunkingconfiguration.html)
It should land in the cdk pretty soon, we'll implement it then. Thank you for your patience !

[aws-rafams]

CDK support landed in 2.154.0: https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_bedrock.CfnDataSource.html

[krokoko]

Great timing ! Reopening as available in the CDK now, will work on it

[krokoko]

This new feature requires the library to be updated to cdk v2.154.0, however I just found out that there is a bug in that version (see here: aws/aws-cdk#31183) which currently prevents the upgrade. The library won't build as a property was removed in cfnDataSource. Will need to wait for V2.154.X for the fix

[krokoko]

A new version with the bug fixed was released overnight, will resume work on this asap

[vaughngit]

Thank you for the updates!

[krokoko]

Closed with #668