Definition: A managed collection of uniquely identifiable concepts with associated representations.
Reference Definition: A Code System is a managed collection of Concept Representations, including codes, but sometimes more complex sets of rules and references, optionally including additional Concept Representations playing various roles including identifiers of the concepts, designations, etc. (HL7 Core Principles)
Reference Definition: An organized collection of terms established by an authoritative source such as a Standards Development Organization (SDO). Examples of Code Systems are SNOMED-CT®, ICD-9-CM, and LOINC®. (SKMT)
Reference Definition: system of codes, descriptions, designations, properties and relationships also sometimes known as "vocabulary", "terminology", "coding scheme", "classification scheme" and "ontology" (ISO 27951:2009)
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