Glossary

 Term  Description
 Concept  Unique record in a Standard Vocabulary
 Concept Class  Subsection within a vocabulary or domain
 Concept ID  Unique identifier across vocabularies and domains for each concept
 Domain  DRUG, CONDITION, PROCEDURE, VISIT, PATIENT STATUS and DEMOGRAPHIC
 Entity  Any unique record in a vocabulary. These vocabularies could be Standard Vocabulary with concepts, or mapped vocabularies without concepts
 Entity Code  Identifier in original source, e.g., a SNOMED-CT identifier. All entities have an entity code.
 Entity Type  Whether an entity is a 'Concept' in a Standard Vocabulary, ‘Synonym’ or a 'Mapped Code' in a vocabulary mapped to a standard one
 Standard Vocabulary  Set of entities in a certain domain curated and maintained by a dedicated organization. For example, RxNorm and Multum for drugs, ICD-9 and SNOMED-CT for conditions.
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