Clinical Document Architecture
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Clinical Document Architecture, published by Health Level 7. This is not an authorized publication; it is the continuous build for version 2.0.1). This version is based on the current content of https://github.com/HL7/CDA-core-2.0/ and changes regularly. See the Directory of published versions

Logical Model: IVL_PQ - Detailed Descriptions

Active as of 2023-10-03

Definitions for the IVL-PQ logical model.

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

0. IVL_PQ
Control1..*
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsivl-pq-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_PQ.unit
Definition

The unit of measure specified in the Unified Code for Units of Measure (UCUM) [].

Control0..1
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.
LabelUnit of Measure
4. IVL_PQ.value
Definition

The magnitude of the quantity measured in terms of the unit.

Control0..1
Typedecimal(real: Real Number)
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.
LabelMaginitude Value
6. IVL_PQ.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 SetOperator
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_PQ.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-PQ
LabelLow Boundary
10. IVL_PQ.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/PQ
LabelCentral Value
12. IVL_PQ.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_PQ.high
Definition

This is the high limit of the interval.

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

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

0. IVL_PQ
Definition

Defines the basic properties of every data value. This is an abstract type, meaning that no value can be just a data value without belonging to any concrete type. Every concrete type is a specialization of this general abstract DataValue type.


Base definition for all types defined in FHIR type system.

ShortBase for all types and resources
Control10..*
Is Modifierfalse
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ivl-pq-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_PQ.unit
Definition

The unit of measure specified in the Unified Code for Units of Measure (UCUM) [].

Control0..1
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.
LabelUnit of Measure
4. IVL_PQ.value
Definition

The magnitude of the quantity measured in terms of the unit.

Control0..1
Typedecimal(real: Real Number)
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.
LabelMaginitude Value
6. IVL_PQ.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 SetOperator
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_PQ.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-PQ
LabelLow Boundary
10. IVL_PQ.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/PQ
LabelCentral Value
12. IVL_PQ.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_PQ.high
Definition

This is the high limit of the interval.

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

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

0. IVL_PQ
Definition

Defines the basic properties of every data value. This is an abstract type, meaning that no value can be just a data value without belonging to any concrete type. Every concrete type is a specialization of this general abstract DataValue type.

ShortBase for all types and resources
Control1..*
Is Modifierfalse
XML FormatIn the XML format, this property has the namespace urn:hl7-org:v3.
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ivl-pq-center: Center cannot co-exist with low or high (center.empty() or (low.empty() and high.empty()))
2. IVL_PQ.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 NullFlavor
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_PQ.unit
Definition

The unit of measure specified in the Unified Code for Units of Measure (UCUM) [].

Control0..1
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.
LabelUnit of Measure
6. IVL_PQ.value
Definition

The magnitude of the quantity measured in terms of the unit.

Control0..1
Typedecimal(real: Real Number)
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.
LabelMaginitude Value
8. IVL_PQ.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 SetOperator
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
10. IVL_PQ.low
Definition

This is the low limit of the interval.

Control0..1
Typehttp://hl7.org/cda/stds/core/StructureDefinition/IVXB-PQ
LabelLow Boundary
12. IVL_PQ.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/PQ
LabelCentral Value
14. IVL_PQ.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
16. IVL_PQ.high
Definition

This is the high limit of the interval.

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