This diagram outlines the how keyword scores and semantic scores are combined for a Keyword-and-Semantic search in chunk mode. It shows that first you apply a RIGHT OUTER JOIN on the document identifiers of both search results. Then you specify the SEARCH_FUSION operation. Then final scoring is computed using the defined SEARCH_SCORER algorithm such as Reciprocal Rank Fusion (RRF) or Relative Score Fusion (RSF). Finally, the topN chunk identifiers are returned at most.