{
  "altLabels": [
    "Neural Sparse Retrieval"
  ],
  "definition": "Retrieval using sparse query and document representations whose feature activations or weights are learned from data.",
  "derivedRelations": [
    {
      "target": "splade",
      "type": "realizedBy"
    },
    {
      "target": "dynamic-pruning",
      "type": "related"
    },
    {
      "target": "semantic-search",
      "type": "related"
    },
    {
      "target": "sparse-retrieval",
      "type": "related"
    }
  ],
  "id": "learned-sparse-retrieval",
  "kind": "Representation",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "links": [
    {
      "label": "SPLADE",
      "type": "definingReference",
      "url": "https://doi.org/10.1145/3404835.3463098"
    }
  ],
  "modifiedAt": "2026-09-12T21:39:00Z",
  "prefLabel": "Learned Sparse Retrieval",
  "publisher": {
    "name": "Searchplex",
    "url": "https://searchplex.net/"
  },
  "relations": [
    {
      "target": "sparse-retrieval",
      "type": "broader"
    },
    {
      "note": "Learned sparse retrieval is a representation family; query expansion is a task or transformation applied to a query.",
      "target": "query-expansion",
      "type": "notEquivalentTo"
    },
    {
      "note": "SPLADE is one model family that realizes learned sparse retrieval, not the whole representation family.",
      "target": "splade",
      "type": "notEquivalentTo"
    },
    {
      "note": "Learned sparse models may activate expansion-like vocabulary features, but the representation family is not the query-expansion task.",
      "target": "query-expansion",
      "type": "related"
    }
  ],
  "representations": {
    "html": "https://id.searchplex.net/learned-sparse-retrieval/",
    "json": "https://id.searchplex.net/learned-sparse-retrieval.json",
    "jsonld": "https://id.searchplex.net/learned-sparse-retrieval.jsonld"
  },
  "scheme": "https://id.searchplex.net/scheme/",
  "scopeNote": "Learned sparse systems commonly retain compatibility with inverted-index-style retrieval while learning lexical or vocabulary-space representations. Expansion-like activations may occur, but the representation family is not itself the query-expansion task.",
  "status": "published",
  "terms": [
    {
      "community": "academic",
      "label": "Sparse Neural Retrieval",
      "usage": "nearSynonym"
    }
  ],
  "uri": "https://id.searchplex.net/learned-sparse-retrieval/"
}