DV_INTERVAL - OpenEHR Base package v0.1.0

OpenEHR Base package
0.1.0 - First Draft International flag

OpenEHR Base package, published by openEHR + HL7. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/openehr-base-ig/ and changes regularly. See the Directory of published versions

Logical Model: DV_INTERVAL - Detailed Descriptions

Page standards status: Informative

Maturity Level: 3

Definitions for the DV-INTERVAL logical model

Key Elements Table
Differential Table
Snapshot Table

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

0. DV_INTERVAL
Definition	Generic class defining an interval (i.e. range) of a comparable type. An interval is a contiguous subrange of a comparable base type. Used to define intervals of dates, times, quantities (whose units match) and so on. The type parameter, `T`, must be a descendant of the type `DV_ORDERED`, which is necessary (but not sufficient) for instances to be compared (`_strictly_comparable_` is also needed). Without the `DV_INTERVAL` class, quite a few more `DV_` classes would be needed to express logical intervals, namely interval versions of all the date/time classes, and of quantity classes. Further, it allows the semantics of intervals to be stated in one place unequivocally, including the conditions for strict comparison. The basic semantics are derived from the class `Interval\<T>`, described in the support RM. Base definition for all types defined in FHIR type system.
Short	Generic class defining an intervalBase for all types and resources
Control	0..*
Type Parameter	T : `http://openehr.org/fhir/StructureDefinition/DV-ORDERED`
Is Modifier	false
Logical Model	Instances of this logical model are not marked to be the target of a Reference
Invariants	limits-consistent: Limits consistent must satisfy range constraints (`(upper_unbounded.not() and lower_unbounded.not()) implies (lower.is_strictly_comparable_to(upper) and lower <= upper)`)
2. DV_INTERVAL.CR
Definition	Carriage return character.
Short	Carriage return character.
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
4. DV_INTERVAL.LF
Definition	Line feed character.
Short	Line feed character.
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
6. DV_INTERVAL.Local-terminology-id
Definition	Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype
Short	Predefined terminology identifier
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
8. DV_INTERVAL.lower
Definition	Lower bound of the interval. Void if the interval is lower-unbounded.
Short	Lower bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
10. DV_INTERVAL.upper
Definition	Upper bound of the interval. Void if the interval is upper-unbounded.
Short	Upper bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
12. DV_INTERVAL.lower-unbounded
Definition	True if the interval has no lower bound. If True, lower is Void.
Short	True if the interval has no lower bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
14. DV_INTERVAL.upper-unbounded
Definition	True if the interval has no upper bound. If True, upper is Void.
Short	True if the interval has no upper bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
16. DV_INTERVAL.lower-included
Definition	True if the lower bound is included in the interval. Only meaningful if lower_unbounded is False.
Short	True if the lower bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
18. DV_INTERVAL.upper-included
Definition	True if the upper bound is included in the interval. Only meaningful if upper_unbounded is False.
Short	True if the upper bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension

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

0. DV_INTERVAL
Definition	Generic class defining an interval (i.e. range) of a comparable type. An interval is a contiguous subrange of a comparable base type. Used to define intervals of dates, times, quantities (whose units match) and so on. The type parameter, `T`, must be a descendant of the type `DV_ORDERED`, which is necessary (but not sufficient) for instances to be compared (`_strictly_comparable_` is also needed). Without the `DV_INTERVAL` class, quite a few more `DV_` classes would be needed to express logical intervals, namely interval versions of all the date/time classes, and of quantity classes. Further, it allows the semantics of intervals to be stated in one place unequivocally, including the conditions for strict comparison. The basic semantics are derived from the class `Interval\<T>`, described in the support RM.
Short	Generic class defining an interval
Control	0..*
Type Parameter	T : `http://openehr.org/fhir/StructureDefinition/DV-ORDERED`
Is Modifier	false
Logical Model	Instances of this logical model are not marked to be the target of a Reference
Invariants	limits-consistent: Limits consistent must satisfy range constraints (`(upper_unbounded.not() and lower_unbounded.not()) implies (lower.is_strictly_comparable_to(upper) and lower <= upper)`)
2. DV_INTERVAL.lower
Definition	Lower bound of the interval. Void if the interval is lower-unbounded.
Short	Lower bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
4. DV_INTERVAL.upper
Definition	Upper bound of the interval. Void if the interval is upper-unbounded.
Short	Upper bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
6. DV_INTERVAL.lower-unbounded
Definition	True if the interval has no lower bound. If True, lower is Void.
Short	True if the interval has no lower bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
8. DV_INTERVAL.upper-unbounded
Definition	True if the interval has no upper bound. If True, upper is Void.
Short	True if the interval has no upper bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
10. DV_INTERVAL.lower-included
Definition	True if the lower bound is included in the interval. Only meaningful if lower_unbounded is False.
Short	True if the lower bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
12. DV_INTERVAL.upper-included
Definition	True if the upper bound is included in the interval. Only meaningful if upper_unbounded is False.
Short	True if the upper bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension

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

0. DV_INTERVAL
Definition	Generic class defining an interval (i.e. range) of a comparable type. An interval is a contiguous subrange of a comparable base type. Used to define intervals of dates, times, quantities (whose units match) and so on. The type parameter, `T`, must be a descendant of the type `DV_ORDERED`, which is necessary (but not sufficient) for instances to be compared (`_strictly_comparable_` is also needed). Without the `DV_INTERVAL` class, quite a few more `DV_` classes would be needed to express logical intervals, namely interval versions of all the date/time classes, and of quantity classes. Further, it allows the semantics of intervals to be stated in one place unequivocally, including the conditions for strict comparison. The basic semantics are derived from the class `Interval\<T>`, described in the support RM.
Short	Generic class defining an interval
Control	0..*
Type Parameter	T : `http://openehr.org/fhir/StructureDefinition/DV-ORDERED`
Is Modifier	false
Logical Model	Instances of this logical model are not marked to be the target of a Reference
Invariants	limits-consistent: Limits consistent must satisfy range constraints (`(upper_unbounded.not() and lower_unbounded.not()) implies (lower.is_strictly_comparable_to(upper) and lower <= upper)`)
2. DV_INTERVAL.CR
Definition	Carriage return character.
Short	Carriage return character.
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
4. DV_INTERVAL.LF
Definition	Line feed character.
Short	Line feed character.
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
6. DV_INTERVAL.Local-terminology-id
Definition	Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype
Short	Predefined terminology identifier
Control	1..1
Type	string
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
8. DV_INTERVAL.lower
Definition	Lower bound of the interval. Void if the interval is lower-unbounded.
Short	Lower bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
10. DV_INTERVAL.upper
Definition	Upper bound of the interval. Void if the interval is upper-unbounded.
Short	Upper bound of the interval.
Control	0..1
Type	http://openehr.org/fhir/StructureDefinition/DV_ORDERED
Is Modifier	false
12. DV_INTERVAL.lower-unbounded
Definition	True if the interval has no lower bound. If True, lower is Void.
Short	True if the interval has no lower bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
14. DV_INTERVAL.upper-unbounded
Definition	True if the interval has no upper bound. If True, upper is Void.
Short	True if the interval has no upper bound.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
16. DV_INTERVAL.lower-included
Definition	True if the lower bound is included in the interval. Only meaningful if lower_unbounded is False.
Short	True if the lower bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
18. DV_INTERVAL.upper-included
Definition	True if the upper bound is included in the interval. Only meaningful if upper_unbounded is False.
Short	True if the upper bound is included in the interval.
Control	1..1
Type	boolean
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension

IG © 2022+ openEHR + HL7. Package openehr.base#0.1.0 based on FHIR 5.0.0. Generated 2026-08-23
Links: Table of Contents | QA Report