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Semantic Types Ontology
Last uploaded:
March 22, 2026
| Acronym | STY |
| Visibility | Public |
| Description | UMLS Semantic Network The Semantic Network consists of (1) a set of broad subject categories, or Semantic Types, that provide a consistent categorization of all concepts represented in the UMLS Metathesaurus, and (2) a set of useful and important relationships, or Semantic Relations, that exist between Semantic Types. This section of the documentation provides an overview of the Semantic Network, and describes the files of the Semantic Network. Sample records illustrate structure and content of these files. The Semantic Network is distributed as one of the UMLS Knowledge Sources and as an open source resource available on the Semantic Network Web site, subject to these terms and conditions. |
| Status | Production |
| Format | UMLS |
| Groups |
| Contact | Bioportal ([email protected]) |
| Creation date | November 3, 2025
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| Deprecated |
false
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| Documentation |
https://www.nlm.nih.gov/
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|
| Homepage |
https://semanticnetwork.nlm.nih.gov/
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| Object creation date property |
http://purl.org/dc/elements/1.1/created
http://purl.org/dc/elements/1.1/created
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| Object modification date property |
http://purl.org/dc/elements/1.1/modified
http://purl.org/dc/elements/1.1/modified
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| Submission date | March 22, 2026
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| Syntax |
http://www.w3.org/ns/formats/Turtle
http://www.w3.org/ns/formats/Turtle
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| Version information |
2025AB
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| uri |
http://purl.bioontology.org/ontology/STY
http://purl.bioontology.org/ontology/STY
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| Version | Released | Uploaded | Downloads |
|---|---|---|---|
| 2025AB (Parsed, Indexed, Metrics, Annotator, Error Diff) | 11/03/2025 | 03/22/2026 | RDF/TTL | CSV |
| 2025AA (Archived) | 05/06/2025 | 03/19/2026 | RDF/TTL |
| 2024AB (Archived) | 11/04/2024 | 01/16/2025 | RDF/TTL |
| 2024AA (Archived) | 05/06/2024 | 08/28/2024 | RDF/TTL |
| 2023AB (Archived) | 11/06/2023 | 01/31/2024 | RDF/TTL |
| 2023AA (Archived) | 04/01/2023 | 08/07/2023 | RDF/TTL |
| 2022AB (Archived) | 11/07/2022 | 01/06/2023 | RDF/TTL |
| 2022AA (Archived) | 05/02/2022 | 06/10/2022 | RDF/TTL |
| 2021AB (Archived) | 11/01/2021 | 11/18/2021 | RDF/TTL |
| 2021AA (Archived) | 04/03/2021 | 05/20/2021 | RDF/TTL |
| 2020AB (Archived) | 11/02/2020 | 01/06/2021 | RDF/TTL |
| 2020AA (Archived) | 05/04/2020 | 09/24/2020 | RDF/TTL |
| 2019AB (Archived) | 11/04/2019 | 11/18/2019 | RDF/TTL |
| 2019AA (Archived) | 05/06/2019 | 08/27/2019 | RDF/TTL |
| 2018AB (Archived) | 11/05/2018 | 04/29/2019 | RDF/TTL |
| 2018AA (Archived) | 05/07/2018 | 07/06/2018 | RDF/TTL |
| 2017AB (Archived) | 11/06/2017 | 07/06/2018 | RDF/TTL |
| 2017AA (Archived) | 05/08/2017 | 04/06/2018 | RDF/TTL |
| 2016AB (Archived) | 02/06/2017 | 02/06/2017 | RDF/TTL |
| 2016AA (Archived) | 09/06/2016 | 09/06/2016 | RDF/TTL |
| 2015AB (Archived) | 07/20/2016 | 07/20/2016 | RDF/TTL |
| 2015AA (Archived) | 06/09/2015 | 06/09/2015 | RDF/TTL |
| 2015AA (Archived) | 06/09/2015 | 06/09/2015 | RDF/TTL |
| 2014AB (Archived) | 01/29/2015 | 01/29/2015 | RDF/TTL |
| 2014AA (Archived) | 09/19/2013 | 08/06/2014 | RDF/TTL |
| 2014AA (Archived) | 09/19/2013 | 09/19/2013 | RDF/TTL |
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No views of STY available
| Classes | 127 |
| Individuals | 0 |
| Properties | 0 |
| Maximum depth | 8 |
| Maximum number of children | 9 |
| Average number of children | 2 |
| Classes with a single child | 12 |
| Classes with more than 25 children | 0 |
| Classes with no definition | 127 |