BM25
BM25 is a ranking function for sparse bag-of-words retrieval. It saturates term frequency and length-normalizes documents, usually beating plain TF-IDF in practice.
Still a default first-stage retriever and a strong complement to embeddings.
BM25 is a ranking function for sparse bag-of-words retrieval. It saturates term frequency and length-normalizes documents, usually beating plain TF-IDF in practice.
Still a default first-stage retriever and a strong complement to embeddings.