missingAttributeKeyStrategy

Specifies the behavior for documents without a value for the collapse attribute.

Amazon Kendra offers three customization options:

• Choose to COLLAPSE all documents with null or missing values in one group. This is the default configuration.

• Choose to IGNORE documents with null or missing values. Ignored documents will not appear in query results.

• Choose to EXPAND each document with a null or missing value into a group of its own.