{
  "altLabels": [
    "Document Expansion by Query Prediction"
  ],
  "definition": "Enriching a document representation with additional generated or selected text, terms, queries, or signals intended to improve retrieval matching.",
  "distinctions": [
    {
      "reason": "Document expansion enriches the indexed document representation; query expansion enriches the query representation.",
      "statement": "Document Expansion is not Query Expansion.",
      "target": "query-expansion",
      "targetLabel": "Query Expansion",
      "targetUri": "https://id.searchplex.net/query-expansion/"
    }
  ],
  "id": "document-expansion",
  "kind": "Task",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "links": [
    {
      "label": "Document Expansion by Query Prediction",
      "type": "definingReference",
      "url": "https://arxiv.org/abs/1904.08375"
    },
    {
      "label": "docTTTTTquery",
      "type": "officialRepository",
      "url": "https://github.com/castorini/docTTTTTquery"
    }
  ],
  "modifiedAt": "2026-09-14T06:43:46Z",
  "prefLabel": "Document Expansion",
  "publisher": {
    "name": "Searchplex",
    "url": "https://searchplex.net/"
  },
  "relations": [
    {
      "note": "Document expansion enriches the indexed document representation; query expansion enriches the query representation.",
      "target": "query-expansion",
      "type": "notEquivalentTo"
    },
    {
      "target": "lexical-retrieval",
      "type": "related"
    },
    {
      "target": "query-expansion",
      "type": "related"
    },
    {
      "target": "retrieval",
      "type": "related"
    },
    {
      "target": "vocabulary-mismatch",
      "type": "related"
    }
  ],
  "representations": {
    "html": "https://id.searchplex.net/document-expansion/",
    "json": "https://id.searchplex.net/document-expansion.json",
    "jsonld": "https://id.searchplex.net/document-expansion.jsonld"
  },
  "scheme": "https://id.searchplex.net/scheme/",
  "scopeNote": "Document expansion modifies or augments the document side, often before indexing. It is distinct from query expansion, which modifies or augments the query side at search time or query-processing time.",
  "status": "published",
  "terms": [
    {
      "community": "academic",
      "label": "Doc2Query",
      "usage": "nearSynonym"
    },
    {
      "community": "academic",
      "label": "docT5query",
      "usage": "nearSynonym"
    }
  ],
  "uri": "https://id.searchplex.net/document-expansion/"
}