KCAE.Profiles:1.2 - Query variants and contextual representations

Question reformulation can expose aliases, translations and the result a method must provide. In HyDE, a generated hypothetical document supplies text to encode for retrieval. That 2023 mechanism can bridge vocabulary without making the generated document evidence. Keep the original question, reject invented case facts, and test whether expansion helps the receiving population rather than only increasing pool size.

Contextual Retrieval attaches generated document context to chunks before embedding and lexical indexing, then combines retrieval and reranking. Its 2024 account supplies a useful context-preservation construction and reported provider experiments. Here it is a historical comparator: the prefix can make an otherwise ambiguous chunk findable, but it is derived text and has context dependencies to refresh. It cannot replace the source reading or warrant transfer of the reported gains.

For fusion, Cormack, Clarke and Buettcher’s Reciprocal Rank Fusion supplies the rank-based mechanism used in KCAE.INDEX:4.4. It avoids requiring comparable raw score magnitudes. The original constant and results belong to the original experiment. Choose pool depths and fusion behavior with the actual candidate population, and retain source-return and permission checks after fusion.