Applied AI·Embeddings and retrieval
someone searched for an exact error code and semantic search returned five conceptually similar pages that did not contain it.
Lexical search / BM25
Also calledBM25
Draft summary, pending review
Classic keyword search, with BM25 as its standard ranking function: term frequency weighted against document frequency and length. Beats semantic search on exact identifiers, error codes and names, which is precisely what engineers search for.