ontology

specification of a conceptualization
Thing field_of_study Q324254
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Summary

ontology ranks in the top 10% of field of study entities by monthly Wikipedia readership (8,408 views/month).[1]

Key Facts

  • Subclass of: knowledge base[2], data model[3], data schema[4], specification[5], knowledge organization system[6]
  • Commons category: Ontology[7]
  • Said to be the same as: knowledge graph[8]
  • Has part(s): ABox[9], TBox[10], RBox[11], class[12], relation[13], attribute[14]
  • Topic's main category: Category:Ontology (information science)[15]
  • Described at URL: https://tomgruber.org/writing/onto-design.pdf[16], https://perso.liris.cnrs.fr/alain.mille/enseignements/Ecole_Centrale/What%20is%20an%20ontology%20and%20why%20we%20need%20it.htm[17]
  • Facet of: knowledge representation[18], knowledge base[19], knowledge graph[20]
  • Stack Exchange tag: https://stackoverflow.com/tags/ontology[21]
  • Used by: frame-based expert system[22], Semantic Web[23]
  • Has characteristic: similarity[24]
  • Native label: computational ontology[25]
  • Equivalent class: http://purl.obolibrary.org/obo/OPMI_0000682[26], http://borhan-onto.ir/ontology/juristic#Ontology[27], http://emmo.info/domain-mappings#Ontology[28]
  • NCI Thesaurus ID: C21270[29]
  • Different from: ontology[30], thesaurus[31], taxonomy[32]
  • ACM Classification Code (2012): 10011147[33]
  • Uses: controlled vocabulary[34]
  • Studied by: ontology engineering[35], computer science[36], information science[37], artificial intelligence[38], natural language processing[39], knowledge engineering[40]
  • Exact match: http://w3id.org/nkos/nkostype#ontology[41], http://purl.org/spar/fabio/Ontology[42]
  • Significant person: Tom Gruber[43], Barry Smith[44], Heinrich Herre[45], Nicola Guarino[46]
  • Named by: artificial intelligence researcher[47]

Why It Matters

ontology has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.[48] ontology is known by 49 alternative names across languages and contexts.[49]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . enterprise-knowledge.com. Retrieved . enterprise-knowledge.com. Provenance: wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . tomgruber.org. Retrieved . tomgruber.org. Provenance: wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . tomgruber.org. tomgruber.org. Provenance: wikidata.org.
  12. [13] ↑ . enterprise-knowledge.com. enterprise-knowledge.com. Provenance: wikidata.org.
  13. [14] ↑ . enterprise-knowledge.com. enterprise-knowledge.com. Provenance: wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . wikidata.org.
  18. [19] ↑ . perso.liris.cnrs.fr. Retrieved . perso.liris.cnrs.fr. Provenance: wikidata.org.
  19. [20] ↑ . enterprise-knowledge.com. Retrieved . enterprise-knowledge.com. Provenance: wikidata.org.
  20. [21] ↑ . wikidata.org.
  21. [22] ↑ . wikidata.org.
  22. [23] ↑ . wikidata.org.
  23. [24] ↑ . wikidata.org.
  24. [25] ↑ . diag.uniroma1.it. diag.uniroma1.it. Provenance: wikidata.org.
  25. [26] ↑ . Ontology of Precision Medicine and Investigation. wikidata.org.
  26. [27] ↑ . Q141247525. wikidata.org.
  27. [28] ↑ . wikidata.org.
  28. [29] ↑ . wikidata.org.
  29. [30] ↑ . wikidata.org.
  30. [31] ↑ . books.infotoday.com. books.infotoday.com. Provenance: wikidata.org.
  31. [32] ↑ . wikidata.org.
  32. [33] ↑ . wikidata.org.
  33. [34] ↑ . kuleuven.be. kuleuven.be. Provenance: wikidata.org.
  34. [35] ↑ . wikidata.org.
  35. [36] ↑ . link.springer.com. link.springer.com. Provenance: wikidata.org.
  36. [37] ↑ . web.dfc.unibo.it. web.dfc.unibo.it. Provenance: wikidata.org.
  37. [38] ↑ . artint.info. artint.info. Provenance: wikidata.org.
  38. [39] ↑ . web.fe.up.pt. web.fe.up.pt. Provenance: wikidata.org.
  39. [40] ↑ . web.fe.up.pt. web.fe.up.pt. Provenance: wikidata.org.
  40. [41] ↑ . wikidata.org.
  41. [42] ↑ . wikidata.org.
  42. [43] ↑ . wikidata.org.
  43. [44] ↑ . wikidata.org.
  44. [45] ↑ . wikidata.org.
  45. [46] ↑ . wikidata.org.
  46. [47] ↑ . oa.upm.es. oa.upm.es. Provenance: wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [48] ↑ . Wikidata sitelinks. wikidata.org.
  3. [49] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). ontology. Retrieved October 18, 2026, from https://4ort.xyz/entity/ontology-q324254
MLA “ontology.” 4ort.xyz Knowledge Graph, 4ort.xyz, 18 Oct. 2026, https://4ort.xyz/entity/ontology-q324254.
BibTeX @misc{4ortxyz_ontology-q324254_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ontology}}, year = {2026}, url = {https://4ort.xyz/entity/ontology-q324254}, note = {Accessed: 2026-10-18}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ontology — https://4ort.xyz/entity/ontology-q324254 (retrieved 2026-10-18)

Canonical URL: https://4ort.xyz/entity/ontology-q324254 · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 4d ago · عُثمان · 2026-10-13 view diff on Wikidata ↗
    Isocat id → 4042, 3359
    Claims rich → —
    "/* wbsetclaim-create:1||1 */ Isocat id: 3359, Matched to [[:toollabs:mix-n-match/#/entry/7328596|Ontology (#7328596)]] in [[:toollabs:mix-n-match/#/catalog/125|ISOCAT]] #mix'n'match"
  2. 8d ago · عُثمان · 2026-10-09 view diff on Wikidata ↗
    Equivalent class → http://purl.obolibrary.org/obo/OPMI_0000682, http://borhan-onto.ir/ontology/juristic#Ontology, http://emmo.info/domain-mappings#Ontology
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ Equivalent class: http://emmo.info/domain-mappings#Ontology"
  3. 9d ago · عُثمان · 2026-10-09 view diff on Wikidata ↗
    Instance of → —
    Claims rich → —
    "/* wbremoveclaims-remove:1| */ Instance of: field of study"
  4. 10d ago · عُثمان · 2026-10-08 view diff on Wikidata ↗
    Wikipedia languages → ['ar', 'az', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en', 'es', 'et', 'eu', 'fa', '
    Equivalent class → http://purl.obolibrary.org/obo/OPMI_0000682, http://borhan-onto.ir/ontology/juristic#Ontology, http://emmo.info/domain-mappings#Ontology
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ Equivalent class: http://borhan-onto.ir/ontology/juristic#Ontology"
  5. 28d ago · عُثمان · 2026-09-19 view diff on Wikidata ↗
    Equivalent class → http://purl.obolibrary.org/obo/OPMI_0000682, http://borhan-onto.ir/ontology/juristic#Ontology, http://emmo.info/domain-mappings#Ontology
    P14892 → Ontology
    Nci thesaurus id → C21270
    Umls cui → C1518584
    "/* wbsetclaim-create:2||1 */ P14892: Ontology"
  6. 5w ago · عُثمان · 2026-09-11 view diff on Wikidata ↗
    P14439 → 001391
    "/* wbsetclaim-create:2||1 */ P14439: 001391"
  7. 5w ago · عُثمان · 2026-09-11 view diff on Wikidata ↗
    Has cause → —
    "/* wbremoveclaims-remove:1| */ Has cause: classification"
  8. 9w ago · Susmuffin · 2026-08-13 view diff on Wikidata ↗
    Harper's tag → ontology
    "/* wbsetclaim-create:1||1 */ Harper's tag: ontology, Matched to [[:toollabs:mix-n-match/#/entry/289956713|ontology (#289956713)]] in [[:toollabs:mix-n-match/#/catalog/7915|Harper's tag]] #mix'n"
  9. 10w ago · ~2026-40781-59 · 2026-08-08 view diff on Wikidata ↗
    Instance of → —
    "/* wbeditentity-update-languages-short:0||en-us, en, pt-br, pt */"
  10. 12w ago · AGADZI · 2026-07-25 view diff on Wikidata ↗
    Instance of → —
    "/* wbsetclaim-update:2||1 */ Instance of: resort"
  11. 13w ago · Nyuhn · 2026-07-12 view diff on Wikidata ↗
    P14541 → 3fRr5N
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/41251|batch #41251]]: ZGBK ID"
  12. 18w ago · Jindřich Rubeš · 2026-06-12 view diff on Wikidata ↗
    Svkkl authority id → 0358861-ontologie-informatika
    "/* wbcreateclaim-create:1| */ Svkkl authority id: 0358861-ontologie-informatika, [[:toollabs:quickstatements/#/batch/259494|batch #259494]]"
  13. 21w ago · Twofivesixbot bot · 2026-05-19 view diff on Wikidata ↗
    Significant person → Tom Gruber, Barry Smith, Heinrich Herre +1
    Used by → —
    Different from → ontology, ontology, thesaurus +1
    Facet of → knowledge representation, knowledge base, knowledge graph
    + 18 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|5 */ Yso id: 22929, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.