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Retrieval & EmbeddingsEasy· BM25· Vocabulary Mismatch· Doc2Query
How do you resolve a search failure where BM25 returns...
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See plansWhen a document is absent from posting lists due to missing keywords, it is not a ranking issue but a coverage issue. Rather than jumping to a full architectural change like a vector database, which is a more expensive lever, you should expand the document’s indexed text at build time. This allows the existing BM25 infrastructure to find the document by matching the expanded terms.