{
  "definition": "A field-aware variant of BM25 that combines term evidence from multiple document fields with field-specific weights or normalization.",
  "distinctions": [
    {
      "reason": "BM25F is a field-aware BM25-family method; BM25 usually refers to the standard non-fielded scoring function.",
      "statement": "BM25F is not BM25.",
      "target": "bm25",
      "targetLabel": "BM25",
      "targetUri": "https://id.searchplex.net/bm25/"
    },
    {
      "reason": "BM25F is one field-aware lexical scoring method; lexical retrieval is the broader retrieval family.",
      "statement": "BM25F is not Lexical Retrieval.",
      "target": "lexical-retrieval",
      "targetLabel": "Lexical Retrieval",
      "targetUri": "https://id.searchplex.net/lexical-retrieval/"
    }
  ],
  "id": "bm25f",
  "kind": "Method",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "links": [
    {
      "label": "Microsoft Cambridge at TREC-13: Web and HARD tracks",
      "type": "definingReference",
      "url": "https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/sigir-2004-mapinference.pdf"
    }
  ],
  "modifiedAt": "2026-09-14T06:43:46Z",
  "prefLabel": "BM25F",
  "publisher": {
    "name": "Searchplex",
    "url": "https://searchplex.net/"
  },
  "relations": [
    {
      "note": "BM25F is a field-aware BM25-family method; BM25 usually refers to the standard non-fielded scoring function.",
      "target": "bm25",
      "type": "notEquivalentTo"
    },
    {
      "note": "BM25F is one field-aware lexical scoring method; lexical retrieval is the broader retrieval family.",
      "target": "lexical-retrieval",
      "type": "notEquivalentTo"
    },
    {
      "target": "bm25",
      "type": "related"
    },
    {
      "target": "lexical-retrieval",
      "type": "related"
    },
    {
      "target": "tf-idf",
      "type": "related"
    },
    {
      "target": "ranking",
      "type": "usedFor"
    },
    {
      "target": "retrieval",
      "type": "usedFor"
    }
  ],
  "representations": {
    "html": "https://id.searchplex.net/bm25f/",
    "json": "https://id.searchplex.net/bm25f.json",
    "jsonld": "https://id.searchplex.net/bm25f.jsonld"
  },
  "scheme": "https://id.searchplex.net/scheme/",
  "scopeNote": "BM25F is used for fielded documents such as title, body, metadata, or anchor text. It is a BM25-family method, not a synonym for BM25 generally or for fielded retrieval as a whole.",
  "status": "published",
  "uri": "https://id.searchplex.net/bm25f/"
}