﻿ HL7.FHIR.CDA\IVL-INT: Interval (V3 Data Type) - Definitions - FHIR v4.0.1

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## Logical Model: IVL-INT - Detailed Descriptions

Definitions for the IVL-INT logical model.

 1. IVL_INT Definition Interval of integers Control 1..* 2. IVL_INT.nullFlavor Definition If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing. Control 0..1 Binding The codes SHALL be taken from NullFlavor Type code 3. IVL_INT.value Control 0..1 Type integer 4. IVL_INT.low Definition This is the low limit of the interval. Control 0..1 Type http://hl7.org/fhir/cda/StructureDefinition/INT 5. IVL_INT.high Definition This is the high limit of the interval. Control 0..1 Type http://hl7.org/fhir/cda/StructureDefinition/INT 6. IVL_INT.width Definition The difference between high and low boundary. The purpose of distinguishing a width property is to handle all cases of incomplete information symmetrically. In any interval representation only two of the three properties high, low, and width need to be stated and the third can be derived. Control 0..1 Type http://hl7.org/fhir/cda/StructureDefinition/PQ 7. IVL_INT.center Definition The arithmetic mean of the interval (low plus high divided by 2). The purpose of distinguishing the center as a semantic property is for conversions of intervals from and to point values. Control 0..1 Type http://hl7.org/fhir/cda/StructureDefinition/INT