is a Ontology.
UMLS Semantic Types are the broad subject categories in the UMLS Semantic Network used to categorize concepts in the UMLS Metathesaurus.
Unknown
Unknown
Unknown
| ID | Name | URL | Category | Format | Description |
|---|---|---|---|---|---|
| sty.docs | UMLS Semantic Network Documentation | NBK9679 | DocumentationProduct | http | NLM documentation for the UMLS Semant... |
| sty.semantic-network | UMLS Semantic Network Files | sn_current.tgz (84.6 KB) | Product | txt | Current UMLS Semantic Network release... |
| sty.semantic-groups ⚠ | UMLS Semantic Groups File | SemGroups.txt | Product | txt | Semantic Groups mapping file that agg... |
| ID | Name | URL | Category | Format | Relation | Description |
|---|---|---|---|---|---|---|
| obo-db-ingest.sty.tsv | sty Nodes TSV | sty.tsv (1.5 KB) | Product | tsv | had primary source | sty Nodes TSV |
The UMLS Semantic Types are part of the UMLS Semantic Network and provide a consistent high-level categorization for concepts represented in the UMLS Metathesaurus.
The Semantic Network couples these broad semantic categories with explicit semantic relations between types, giving the UMLS a compact upper-level structure for organizing concepts drawn from many vocabularies. NLM also publishes a Semantic Groups file that collapses the type system into coarser partitions for common interoperability and analysis tasks.
Created: February 26, 2026 | Last modified: May 30, 2026