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Unified Medical Language System® (UMLS®)

2012AB MeSH Source Information

Counts

 (skip to: notes)

Semantic Type Count Percentage
ORGANIC CHEMICAL 139783 42.4
AMINO ACID, PEPTIDE, OR PROTEIN 106329 32.3
PHARMACOLOGIC SUBSTANCE 81958 24.9
BIOLOGICALLY ACTIVE SUBSTANCE 57186 17.4
ENZYME 24734 7.5
CARBOHYDRATE 11026 3.3
STEROID 9050 2.7
NUCLEIC ACID, NUCLEOSIDE, OR NUCLEOTIDE 8194 2.5
DISEASE OR SYNDROME 7923 2.4
INDICATOR, REAGENT, OR DIAGNOSTIC AID 7008 2.1
LIPID 5960 1.8
IMMUNOLOGIC FACTOR 5833 1.8
HAZARDOUS OR POISONOUS SUBSTANCE 4644 1.4
RECEPTOR 4625 1.4
INORGANIC CHEMICAL 3927 1.2
ANTIBIOTIC 3541 1.1

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