Clinical Document Architecture with Australian Schema
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Logical Model: IVL_TS - Detailed Descriptions

Active as of 2024-08-29

Definitions for the IVL-TS logical model.

Guidance on how to interpret the contents of this table can be found here

0. IVL_TS
Control1..*
Logical ContainerADHA ClinicalDocument (CDA Class)
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsivl-ts-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_TS.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelLow Boundary
4. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/TS
LabelCentral Value
6. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/PQ
LabelWidth
8. IVL_TS.high
Definition

This is the high limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelHigh Boundary

Guidance on how to interpret the contents of this table can be found here

0. IVL_TS
Definition

A quantity specifying a point on the axis of natural time. A point in time is most often represented as a calendar expression.


Base definition for all types defined in FHIR type system.

ShortBase for all types and resources
Control10..*
Is Modifierfalse
Logical ContainerADHA ClinicalDocument (CDA Class)
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsivl-ts-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_TS.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelLow Boundary
4. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/TS
LabelCentral Value
6. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/PQ
LabelWidth
8. IVL_TS.high
Definition

This is the high limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelHigh Boundary

Guidance on how to interpret the contents of this table can be found here

0. IVL_TS
Definition

A quantity specifying a point on the axis of natural time. A point in time is most often represented as a calendar expression.

ShortBase for all types and resources
Control1..*
Is Modifierfalse
Logical ContainerADHA ClinicalDocument (CDA Class)
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsivl-ts-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_TS.nullFlavor
Definition

If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.

Control0..1
BindingThe codes SHALL be taken from CDANullFlavor
(required to http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
LabelExceptional Value Detail
4. IVL_TS.value
Definition

A quantity specifying a point on the axis of natural time. A point in time is most often represented as a calendar expression.

Control0..1
TypedateTime(ts: Point in Time)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Date FormatYYYYMMDDHHMMSS.UUUU[+|-ZZzz]
XML FormatIn the XML format, this property is represented as an attribute.
6. IVL_TS.operator
Definition

A code specifying whether the set component is included (union) or excluded (set-difference) from the set, or other set operations with the current set component and the set as constructed from the representation stream up to the current point.

Control0..1
BindingThe codes SHALL be taken from CDASetOperator
(required to http://hl7.org/cda/stds/core/ValueSet/CDASetOperator)
Typecode(cs: Coded Simple Value)
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
XML FormatIn the XML format, this property is represented as an attribute.
Default ValueI
8. IVL_TS.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelLow Boundary
10. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/TS
LabelCentral Value
12. IVL_TS.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.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/PQ
LabelWidth
14. IVL_TS.high
Definition

This is the high limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-TS
LabelHigh Boundary