{description: Code system of concepts used to classify an observation definition as intended to measure a patient's state at a point in time.  Used in HL7 Version 2.x messaging in the OM1 segment., package_name: hl7.terminology.r4b, name: DurationCategories, type: null, package_version: 2.1.0, class: unknown, kind: null, url: 'http://terminology.hl7.org/CodeSystem/v2-0255', version: 2.3.0}