Clinical Document Architecture
2.0.1-sd - release

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

Logical Model: Precondition2 (CDA Class)

Official URL: http://hl7.org/cda/stds/core/StructureDefinition/Precondition2 Version: 2.0.1-sd
Active as of 2025-09-17 Computable Name: Precondition2

The sdtc:precondition2 extension allows a more flexible set of skip conditions on a set of criteria. Without this extension the skip condition is restricted to all criteria true. The extension allows a choice of the following logical operation extensions sdtc:allTrue, sdtc:allFalse, sdtc:atLeastOneTrue, sdtc:atLeastOneFalse, sdtc:onlyOneFalse, and sdtc:onlyOneTrue to be placed upon the encapsulated criteria or a criterion. The logical operation extensions nest a [0 .. *] sdtc:precondition2 extension allowing for a complex specification of nested skip conditions if needed.

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Template Content

Description of Template, Differentials, Snapshots and how the different presentations work.

This structure is derived from InfrastructureRoot

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings (Differential)

PathConformanceValueSet / CodeURI
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
... realmCode 0..* CS
... typeId C 0..1 II Constraints: II-1
.... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
.... @assigningAuthorityName 0..1 st
.... @displayable 0..1 bl
.... @root 1..1 oid, uuid, ruid Fixed Value: 2.16.840.1.113883.1.3
.... @extension 1..1 st
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
... (Choice of one) 1..1
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Precondition2.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeId.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
II-1errorPrecondition2.typeIdAn II instance must have either a root or an nullFlavor.
: root.exists() or nullFlavor.exists()
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
... realmCode 0..* CS
... typeId C 0..1 II Constraints: II-1
.... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
.... @assigningAuthorityName 0..1 st
.... @displayable 0..1 bl
.... @root 1..1 oid, uuid, ruid Fixed Value: 2.16.840.1.113883.1.3
.... @extension 1..1 st
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
... (Choice of one) 1..1
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Precondition2.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeId.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
II-1errorPrecondition2.typeIdAn II instance must have either a root or an nullFlavor.
: root.exists() or nullFlavor.exists()
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1

This structure is derived from InfrastructureRoot

Summary

Mandatory: 0 element(1 nested mandatory element)
Fixed: 1 element

Structures

This structure refers to these other structures:

Differential View

This structure is derived from InfrastructureRoot

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings (Differential)

PathConformanceValueSet / CodeURI
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1

Key Elements View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
... realmCode 0..* CS
... typeId C 0..1 II Constraints: II-1
.... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
.... @assigningAuthorityName 0..1 st
.... @displayable 0..1 bl
.... @root 1..1 oid, uuid, ruid Fixed Value: 2.16.840.1.113883.1.3
.... @extension 1..1 st
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
... (Choice of one) 1..1
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Precondition2.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeId.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
II-1errorPrecondition2.typeIdAn II instance must have either a root or an nullFlavor.
: root.exists() or nullFlavor.exists()
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Precondition2 C 1..1 InfrastructureRoot XML Namespace: urn:hl7-org:sdtc
Elements defined in Ancestors:@nullFlavor, realmCode, typeId, templateId
Base for all types and resources
Instance of this type are validated by templateId
Logical Container: ClinicalDocument (CDA Class)
Constraints: precondition2-only-one
... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
... realmCode 0..* CS
... typeId C 0..1 II Constraints: II-1
.... @nullFlavor 0..1 cs Binding: CDANullFlavor (required)
.... @assigningAuthorityName 0..1 st
.... @displayable 0..1 bl
.... @root 1..1 oid, uuid, ruid Fixed Value: 2.16.840.1.113883.1.3
.... @extension 1..1 st
... @typeCode 0..1 cs Binding: CDAActRelationshipType (required)
Fixed Value: PRCN
... @negationInd 0..1 bl
... conjunctionCode 1..1 CS XML Namespace: urn:hl7-org:sdtc
Binding: RelationshipConjunction (2.0.0) (required)
... (Choice of one) 1..1
.... allTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... allFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... atLeastOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneTrue 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... onlyOneFalse 0..1 PreconditionBase XML Namespace: urn:hl7-org:sdtc
.... criterion 0..1 Criterion XML Namespace: urn:hl7-org:sdtc

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Precondition2.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeId.nullFlavorrequiredCDANullFlavor
http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor
From this IG
Precondition2.typeCoderequiredFixed Value: PRCN
http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType
From this IG
Precondition2.conjunctionCoderequiredRelationshipConjunction
http://terminology.hl7.org/ValueSet/v3-RelationshipConjunction|2.0.0

Constraints

IdGradePath(s)DetailsRequirements
II-1errorPrecondition2.typeIdAn II instance must have either a root or an nullFlavor.
: root.exists() or nullFlavor.exists()
precondition2-only-oneerrorPrecondition2SHALL have only one of allTrue, allFalse, atLeastOneTrue, atLeastOneFalse, onlyOneTrue, onlyOneFalse, or criterion
: (allTrue | allFalse | atLeastOneTrue | atLeastOneFalse | onlyOneTrue | onlyOneFalse | criterion).count() = 1

This structure is derived from InfrastructureRoot

Summary

Mandatory: 0 element(1 nested mandatory element)
Fixed: 1 element

Structures

This structure refers to these other structures:

 

Other representations of profile: CSV, Excel