Can MMR be applied only to the semantic part of a hybrid query?

OpenSearch
1

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser): 3.3

Describe the issue:Can MMR be applied only to the semantic part of a hybrid query?

  • Execute the semantic subquery (kNN/neural) first.

  • Produce a top-K semantic candidate list (vectors + similarity scores).

  • Run MMR on that semantic-only candidate list to produce a diversified semantic list.

  • Feed the diversified semantic list as the semantic channel into the hybrid fusion step (lexical + diversified semantic scores combined).

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@rajanimaski I’m just adding this for traceability.