{
  "altLabels": [
    "Automatic Query Expansion",
    "AQE"
  ],
  "definition": "Enriching a query with additional retrieval evidence intended to improve retrieval effectiveness.",
  "derivedRelations": [
    {
      "target": "query-drift",
      "type": "related"
    },
    {
      "target": "pseudo-relevance-feedback",
      "type": "uses"
    }
  ],
  "id": "query-expansion",
  "kind": "Task",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "links": [
    {
      "label": "Relevance feedback and query expansion",
      "type": "definingReference",
      "url": "https://nlp.stanford.edu/IR-book/html/htmledition/relevance-feedback-and-query-expansion-1.html"
    }
  ],
  "mappings": [
    {
      "relation": "closeMatch",
      "scheme": "wikidata",
      "uri": "https://www.wikidata.org/entity/Q3500136"
    },
    {
      "relation": "relatedMatch",
      "scheme": "acm-ccs-2012",
      "uri": "https://dl.acm.org/ccs/ccs_flat.cfm#10002951.10003317"
    }
  ],
  "modifiedAt": "2026-09-12T21:39:00Z",
  "prefLabel": "Query Expansion",
  "publisher": {
    "name": "Searchplex",
    "url": "https://searchplex.net/"
  },
  "relations": [
    {
      "target": "query-transformation",
      "type": "broader"
    },
    {
      "note": "Learned sparse retrieval may produce expansion-like representations, but it is a retrieval representation family rather than the query-expansion task.",
      "target": "learned-sparse-retrieval",
      "type": "notEquivalentTo"
    },
    {
      "note": "Query understanding is the broader interpretation workflow; query expansion is one possible transformation within that workflow.",
      "target": "query-understanding",
      "type": "notEquivalentTo"
    },
    {
      "note": "SPLADE is a learned sparse model family with expansion-like behavior, not the task of query expansion.",
      "target": "splade",
      "type": "notEquivalentTo"
    },
    {
      "note": "Often implemented as a query-understanding workflow component.",
      "target": "query-understanding",
      "type": "partOf"
    },
    {
      "target": "learned-sparse-retrieval",
      "type": "related"
    },
    {
      "target": "pseudo-relevance-feedback",
      "type": "related"
    },
    {
      "target": "query-reformulation",
      "type": "related"
    },
    {
      "target": "query-rewriting",
      "type": "related"
    },
    {
      "target": "splade",
      "type": "related"
    }
  ],
  "representations": {
    "html": "https://id.searchplex.net/query-expansion/",
    "json": "https://id.searchplex.net/query-expansion.json",
    "jsonld": "https://id.searchplex.net/query-expansion.jsonld"
  },
  "scheme": "https://id.searchplex.net/scheme/",
  "scopeNote": "Covers expansion of the query representation rather than ranking-stage relevance estimation.",
  "slugAliases": [
    "aqe"
  ],
  "status": "published",
  "uri": "https://id.searchplex.net/query-expansion/"
}