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Unified Medical Language System® (UMLS®)

2012AB National Drug File - Reference Terminology Source Information

Counts

 (skip to: notes)

Semantic Type Count Percentage
CLINICAL DRUG 11883 28.1
PHARMACOLOGIC SUBSTANCE 8073 19.1
PATHOLOGIC FUNCTION 7099 16.8
ORGANIC CHEMICAL 6135 14.5
AMINO ACID, PEPTIDE, OR PROTEIN 4671 11
DISEASE OR SYNDROME 2842 6.7
BIOLOGICALLY ACTIVE SUBSTANCE 2024 4.8
ENZYME 1483 3.5
MOLECULAR FUNCTION 1207 2.9
IMMUNOLOGIC FACTOR 1105 2.6
ORGAN OR TISSUE FUNCTION 838 2
INDICATOR, REAGENT, OR DIAGNOSTIC AID 766 1.8
NEOPLASTIC PROCESS 597 1.4
FOOD 533 1.3
RECEPTOR 540 1.3
BIOMEDICAL OR DENTAL MATERIAL 442 1
INORGANIC CHEMICAL 434 1
ANTIBIOTIC 417 1

Notes

  • Semantic Types are a set of broad subject areas that provide a consistent categorization of concepts represented in the Metathesaurus. Semantic Types are arranged into two mutually exclusive hierarchies, Entity and Event.
  • Semantic Types help summarize the content of a source.
  • Each Metathesaurus concept is assigned at least one semantic type, many have more than one.
  • The report displays the most frequently assigned semantic types in descending order, up to a total of 1%.
  • The 'Count' field below is the number of concepts assigned a specific semantic type and containing at least one atom from the source.
  • The 'Percentage' field below is the count relative to the total number of concepts that contain an atom from that source.
  • The MRSTY file contains one row for each Semantic Type assigned to each concept. All Metathesaurus concepts have at least one entry in this file.
  • See Chapter 5 of the UMLS Reference Manual to read more about the Semantic Network