This page is part of the Clinical Guidelines (v2.0.0: STU2) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

• Content
• Detailed Descriptions
• Mappings
• XML
• JSON
• TTL

Resource Profile: CPG Case Feature Definition

Profile of StructureDefinition to represent a case feature of a clinical practice guideline, optionally specifying formal computational semantics, as well as relationships to other case features and specific aspects of the guideline

Usage:

• Refer to this Resource Profile: CPG Generate Report Task, CPG Instantiates Case Feature Extension and CPG Report With Extension
• Examples for this Resource Profile: CHFBodyWeightChange, CHFBodyWeight, CHFCardiologyConsultRequest, CHFCardiologyConsult... Show 13 more, CHFCreatinine, CHFEGFR, CHFJVPRequest, CHFJVP, CHFLASIXIVAdminisistration, CHFLASIXIVRequest, CHFLASIXPOAdminisistration, CHFLASIXPORequest, CHFNetIO, CHFO2SatRequest, CHFO2Sat, CHFPotassium and CHFUrineOut

Formal Views of Profile Content

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

• Differential Table
• Key Elements Table
• Snapshot Table
• Statistics/References
• All

This structure is derived from StructureDefinition

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition		0..*	StructureDefinition	Structural Definition
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
kind		1..1	code	primitive-type | complex-type | resource | logical Fixed Value: resource
abstract		1..1	boolean	Whether the structure is abstract Fixed Value: false
derivation		1..1	code	specialization | constraint - How relates to base definition Fixed Value: constraint
Documentation for this format

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	0..*	StructureDefinition	Structural Definition sdf-0: Name should be usable as an identifier for the module by machine processing applications such as code generation sdf-1: Element paths must be unique unless the structure is a constraint sdf-15a: If the first element in a differential has no "." in the path and it's not a logical model, it has no type sdf-4: If the structure is not abstract, then there SHALL be a baseDefinition sdf-5: If the structure defines an extension then the structure must have context information sdf-6: A structure must have either a differential, or a snapshot (or both) sdf-9: In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) sdf-11: If there's a type, its content must match the path name in the first element of a snapshot sdf-14: All element definitions must have an id sdf-15: The first element in a snapshot has no type unless model is a logical model. sdf-16: All element definitions must have unique ids (snapshot) sdf-17: All element definitions must have unique ids (diff) sdf-18: Context Invariants can only be used for extensions sdf-19: FHIR Specification models only use FHIR defined types sdf-21: Default values can only be specified on specializations sdf-22: FHIR Specification models never have default values sdf-23: No slice name on root
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	Σ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
name	ΣC	1..1	string	Name for this structure definition (computer friendly)
status	?!Σ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing. Fixed Value: resource
abstract	Σ	1..1	boolean	Whether the structure is abstract Fixed Value: false
type	ΣC	1..1	uri	Type defined or constrained by this structure Binding: FHIRDefinedType (extensible): Either a resource or a data type, including logical model types.
derivation	Σ	1..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition. Fixed Value: constraint
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
StructureDefinition.status	required	PublicationStatus http://hl7.org/fhir/ValueSet/publication-status|4.0.1 from the FHIR Standard
StructureDefinition.kind	required	Fixed Value: resource http://hl7.org/fhir/ValueSet/structure-definition-kind|4.0.1 from the FHIR Standard
StructureDefinition.type	extensible	FHIRDefinedType http://hl7.org/fhir/ValueSet/defined-types from the FHIR Standard
StructureDefinition.derivation	required	Fixed Value: constraint http://hl7.org/fhir/ValueSet/type-derivation-rule|4.0.1 from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	StructureDefinition	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	StructureDefinition	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	StructureDefinition	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
sdf-0	warning	StructureDefinition	Name should be usable as an identifier for the module by machine processing applications such as code generation : name.matches('[A-Z]([A-Za-z0-9_]){0,254}')
sdf-1	error	StructureDefinition	Element paths must be unique unless the structure is a constraint : derivation = 'constraint' or snapshot.element.select(path).isDistinct()
sdf-6	error	StructureDefinition	A structure must have either a differential, or a snapshot (or both) : snapshot.exists() or differential.exists()
sdf-14	error	StructureDefinition	All element definitions must have an id : snapshot.element.all(id.exists()) and differential.element.all(id.exists())	elements have id
sdf-15a	error	StructureDefinition	If the first element in a differential has no "." in the path and it's not a logical model, it has no type : (kind!='logical' and differential.element.first().path.contains('.').not()) implies differential.element.first().type.empty()	No Type on the root element (differential)
sdf-4	error	StructureDefinition	If the structure is not abstract, then there SHALL be a baseDefinition : abstract = true or baseDefinition.exists()	Ensure that the base types are abstract
sdf-5	error	StructureDefinition	If the structure defines an extension then the structure must have context information : type != 'Extension' or derivation = 'specialization' or (context.exists())
sdf-9	error	StructureDefinition	In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) : children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.empty()	Because these 3 fields seem to be have overlapping meaning with the ones in the root of StructureDefinition
sdf-11	error	StructureDefinition	If there's a type, its content must match the path name in the first element of a snapshot : kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type	Ensure that the type is not inconsistent with the other information in the structure
sdf-15	error	StructureDefinition	The first element in a snapshot has no type unless model is a logical model. : kind!='logical' implies snapshot.element.first().type.empty()	No Type on the root element (snapshot)
sdf-16	error	StructureDefinition	All element definitions must have unique ids (snapshot) : snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-17	error	StructureDefinition	All element definitions must have unique ids (diff) : differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-18	error	StructureDefinition	Context Invariants can only be used for extensions : contextInvariant.exists() implies type = 'Extension'	contextInvariant
sdf-19	error	StructureDefinition	FHIR Specification models only use FHIR defined types : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')))	custom types only in logical models
sdf-21	error	StructureDefinition	Default values can only be specified on specializations : differential.element.defaultValue.exists() implies (derivation = 'specialization')	no default values on data types or resources
sdf-22	error	StructureDefinition	FHIR Specification models never have default values : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.empty() and differential.element.defaultValue.empty())	no default values on data types or resources
sdf-23	error	StructureDefinition	No slice name on root : (snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())	no sliceName on root

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	0..*	StructureDefinition	Structural Definition sdf-0: Name should be usable as an identifier for the module by machine processing applications such as code generation sdf-1: Element paths must be unique unless the structure is a constraint sdf-15a: If the first element in a differential has no "." in the path and it's not a logical model, it has no type sdf-4: If the structure is not abstract, then there SHALL be a baseDefinition sdf-5: If the structure defines an extension then the structure must have context information sdf-6: A structure must have either a differential, or a snapshot (or both) sdf-9: In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) sdf-11: If there's a type, its content must match the path name in the first element of a snapshot sdf-14: All element definitions must have an id sdf-15: The first element in a snapshot has no type unless model is a logical model. sdf-16: All element definitions must have unique ids (snapshot) sdf-17: All element definitions must have unique ids (diff) sdf-18: Context Invariants can only be used for extensions sdf-19: FHIR Specification models only use FHIR defined types sdf-21: Default values can only be specified on specializations sdf-22: FHIR Specification models never have default values sdf-23: No slice name on root
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	Σ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
identifier	Σ	0..*	Identifier	Additional identifier for the structure definition
version	Σ	0..1	string	Business version of the structure definition
name	ΣC	1..1	string	Name for this structure definition (computer friendly)
title	Σ	0..1	string	Name for this structure definition (human friendly)
status	?!Σ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	Σ	0..1	boolean	For testing purposes, not real usage
date	Σ	0..1	dateTime	Date last changed
publisher	Σ	0..1	string	Name of the publisher (organization or individual)
contact	Σ	0..*	ContactDetail	Contact details for the publisher
description		0..1	markdown	Natural language description of the structure definition
useContext	Σ	0..*	UsageContext	The context that the content is intended to support
jurisdiction	Σ	0..*	CodeableConcept	Intended jurisdiction for structure definition (if applicable) Binding: Jurisdiction ValueSet (extensible): Countries and regions within which this artifact is targeted for use.
purpose		0..1	markdown	Why this structure definition is defined
copyright		0..1	markdown	Use and/or publishing restrictions
keyword	Σ	0..*	Coding	Assist with indexing and finding Binding: DefinitionUseCodes (extensible): Codes for the meaning of the defined structure (SNOMED CT and LOINC codes, as an example).
fhirVersion	Σ	0..1	code	FHIR Version this StructureDefinition targets Binding: FHIRVersion (required): All published FHIR Versions.
mapping	C	0..*	BackboneElement	External specification that the content is mapped to sdf-2: Must have at least a name or a uri (or both)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
identity		1..1	id	Internal id when this mapping is used
uri	C	0..1	uri	Identifies what this mapping refers to
name	C	0..1	string	Names what this mapping refers to
comment		0..1	string	Versions, Issues, Scope limitations etc.
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing. Fixed Value: resource
abstract	Σ	1..1	boolean	Whether the structure is abstract Fixed Value: false
context	ΣC	0..*	BackboneElement	If an extension, where it can be used in instances
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
type	Σ	1..1	code	fhirpath | element | extension Binding: ExtensionContextType (required): How an extension context is interpreted.
expression	Σ	1..1	string	Where the extension can be used in instances
contextInvariant	ΣC	0..*	string	FHIRPath invariants - when the extension can be used
type	ΣC	1..1	uri	Type defined or constrained by this structure Binding: FHIRDefinedType (extensible): Either a resource or a data type, including logical model types.
baseDefinition	ΣC	0..1	canonical(StructureDefinition)	Definition that this type is constrained/specialized from
derivation	Σ	1..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition. Fixed Value: constraint
snapshot	C	0..1	BackboneElement	Snapshot view of the structure sdf-3: Each element definition in a snapshot must have a formal definition and cardinalities sdf-8: All snapshot elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models sdf-8b: All snapshot elements must have a base definition
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
element	C	1..*	ElementDefinition	Definition of elements in the resource (if no StructureDefinition) sdf-10: provide either a binding reference or a description (or both)
differential	C	0..1	BackboneElement	Differential view of the structure sdf-20: No slicing on the root element sdf-8a: In any differential, all the elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
element		1..*	ElementDefinition	Definition of elements in the resource (if no StructureDefinition)
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
StructureDefinition.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding http://hl7.org/fhir/ValueSet/languages from the FHIR Standard
StructureDefinition.status	required	PublicationStatus http://hl7.org/fhir/ValueSet/publication-status|4.0.1 from the FHIR Standard
StructureDefinition.jurisdiction	extensible	Jurisdiction ValueSet http://hl7.org/fhir/ValueSet/jurisdiction from the FHIR Standard
StructureDefinition.keyword	extensible	DefinitionUseCodes http://hl7.org/fhir/ValueSet/definition-use from the FHIR Standard
StructureDefinition.fhirVersion	required	FHIRVersion http://hl7.org/fhir/ValueSet/FHIR-version|4.0.1 from the FHIR Standard
StructureDefinition.kind	required	Fixed Value: resource http://hl7.org/fhir/ValueSet/structure-definition-kind|4.0.1 from the FHIR Standard
StructureDefinition.context.type	required	ExtensionContextType http://hl7.org/fhir/ValueSet/extension-context-type|4.0.1 from the FHIR Standard
StructureDefinition.type	extensible	FHIRDefinedType http://hl7.org/fhir/ValueSet/defined-types from the FHIR Standard
StructureDefinition.derivation	required	Fixed Value: constraint http://hl7.org/fhir/ValueSet/type-derivation-rule|4.0.1 from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	StructureDefinition	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	StructureDefinition	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	StructureDefinition	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
sdf-0	warning	StructureDefinition	Name should be usable as an identifier for the module by machine processing applications such as code generation : name.matches('[A-Z]([A-Za-z0-9_]){0,254}')
sdf-1	error	StructureDefinition	Element paths must be unique unless the structure is a constraint : derivation = 'constraint' or snapshot.element.select(path).isDistinct()
sdf-15a	error	StructureDefinition	If the first element in a differential has no "." in the path and it's not a logical model, it has no type : (kind!='logical' and differential.element.first().path.contains('.').not()) implies differential.element.first().type.empty()	No Type on the root element (differential)
sdf-2	error	StructureDefinition.mapping	Must have at least a name or a uri (or both) : name.exists() or uri.exists()
sdf-3	error	StructureDefinition.snapshot	Each element definition in a snapshot must have a formal definition and cardinalities : element.all(definition.exists() and min.exists() and max.exists())
sdf-4	error	StructureDefinition	If the structure is not abstract, then there SHALL be a baseDefinition : abstract = true or baseDefinition.exists()	Ensure that the base types are abstract
sdf-5	error	StructureDefinition	If the structure defines an extension then the structure must have context information : type != 'Extension' or derivation = 'specialization' or (context.exists())
sdf-6	error	StructureDefinition	A structure must have either a differential, or a snapshot (or both) : snapshot.exists() or differential.exists()
sdf-8	error	StructureDefinition.snapshot	All snapshot elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models : (%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(path.startsWith(%resource.snapshot.element.first().path&'.'))
sdf-9	error	StructureDefinition	In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) : children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.empty()	Because these 3 fields seem to be have overlapping meaning with the ones in the root of StructureDefinition
sdf-10	error	StructureDefinition.snapshot.element	provide either a binding reference or a description (or both) : binding.empty() or binding.valueSet.exists() or binding.description.exists()	binding is required
sdf-11	error	StructureDefinition	If there's a type, its content must match the path name in the first element of a snapshot : kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type	Ensure that the type is not inconsistent with the other information in the structure
sdf-14	error	StructureDefinition	All element definitions must have an id : snapshot.element.all(id.exists()) and differential.element.all(id.exists())	elements have id
sdf-15	error	StructureDefinition	The first element in a snapshot has no type unless model is a logical model. : kind!='logical' implies snapshot.element.first().type.empty()	No Type on the root element (snapshot)
sdf-16	error	StructureDefinition	All element definitions must have unique ids (snapshot) : snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-17	error	StructureDefinition	All element definitions must have unique ids (diff) : differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-18	error	StructureDefinition	Context Invariants can only be used for extensions : contextInvariant.exists() implies type = 'Extension'	contextInvariant
sdf-19	error	StructureDefinition	FHIR Specification models only use FHIR defined types : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')))	custom types only in logical models
sdf-20	error	StructureDefinition.differential	No slicing on the root element : element.where(path.contains('.').not()).slicing.empty()	no slicing on root
sdf-21	error	StructureDefinition	Default values can only be specified on specializations : differential.element.defaultValue.exists() implies (derivation = 'specialization')	no default values on data types or resources
sdf-22	error	StructureDefinition	FHIR Specification models never have default values : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.empty() and differential.element.defaultValue.empty())	no default values on data types or resources
sdf-23	error	StructureDefinition	No slice name on root : (snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())	no sliceName on root
sdf-8a	error	StructureDefinition.differential	In any differential, all the elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models : (%resource.kind = 'logical' or element.first().path.startsWith(%resource.type)) and (element.tail().empty() or element.tail().all(path.startsWith(%resource.differential.element.first().path.replaceMatches('\\..*','')&'.')))
sdf-8b	error	StructureDefinition.snapshot	All snapshot elements must have a base definition : element.all(base.exists())

This structure is derived from StructureDefinition

Summary

Mandatory: 1 element
Must-Support: 4 elements
Fixed: 3 elements

Extensions

This structure refers to these extensions:

• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf

Differential View

This structure is derived from StructureDefinition

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition		0..*	StructureDefinition	Structural Definition
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
kind		1..1	code	primitive-type | complex-type | resource | logical Fixed Value: resource
abstract		1..1	boolean	Whether the structure is abstract Fixed Value: false
derivation		1..1	code	specialization | constraint - How relates to base definition Fixed Value: constraint
Documentation for this format

Key Elements View

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	0..*	StructureDefinition	Structural Definition sdf-0: Name should be usable as an identifier for the module by machine processing applications such as code generation sdf-1: Element paths must be unique unless the structure is a constraint sdf-15a: If the first element in a differential has no "." in the path and it's not a logical model, it has no type sdf-4: If the structure is not abstract, then there SHALL be a baseDefinition sdf-5: If the structure defines an extension then the structure must have context information sdf-6: A structure must have either a differential, or a snapshot (or both) sdf-9: In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) sdf-11: If there's a type, its content must match the path name in the first element of a snapshot sdf-14: All element definitions must have an id sdf-15: The first element in a snapshot has no type unless model is a logical model. sdf-16: All element definitions must have unique ids (snapshot) sdf-17: All element definitions must have unique ids (diff) sdf-18: Context Invariants can only be used for extensions sdf-19: FHIR Specification models only use FHIR defined types sdf-21: Default values can only be specified on specializations sdf-22: FHIR Specification models never have default values sdf-23: No slice name on root
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	Σ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
name	ΣC	1..1	string	Name for this structure definition (computer friendly)
status	?!Σ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing. Fixed Value: resource
abstract	Σ	1..1	boolean	Whether the structure is abstract Fixed Value: false
type	ΣC	1..1	uri	Type defined or constrained by this structure Binding: FHIRDefinedType (extensible): Either a resource or a data type, including logical model types.
derivation	Σ	1..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition. Fixed Value: constraint
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
StructureDefinition.status	required	PublicationStatus http://hl7.org/fhir/ValueSet/publication-status|4.0.1 from the FHIR Standard
StructureDefinition.kind	required	Fixed Value: resource http://hl7.org/fhir/ValueSet/structure-definition-kind|4.0.1 from the FHIR Standard
StructureDefinition.type	extensible	FHIRDefinedType http://hl7.org/fhir/ValueSet/defined-types from the FHIR Standard
StructureDefinition.derivation	required	Fixed Value: constraint http://hl7.org/fhir/ValueSet/type-derivation-rule|4.0.1 from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	StructureDefinition	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	StructureDefinition	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	StructureDefinition	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
sdf-0	warning	StructureDefinition	Name should be usable as an identifier for the module by machine processing applications such as code generation : name.matches('[A-Z]([A-Za-z0-9_]){0,254}')
sdf-1	error	StructureDefinition	Element paths must be unique unless the structure is a constraint : derivation = 'constraint' or snapshot.element.select(path).isDistinct()
sdf-6	error	StructureDefinition	A structure must have either a differential, or a snapshot (or both) : snapshot.exists() or differential.exists()
sdf-14	error	StructureDefinition	All element definitions must have an id : snapshot.element.all(id.exists()) and differential.element.all(id.exists())	elements have id
sdf-15a	error	StructureDefinition	If the first element in a differential has no "." in the path and it's not a logical model, it has no type : (kind!='logical' and differential.element.first().path.contains('.').not()) implies differential.element.first().type.empty()	No Type on the root element (differential)
sdf-4	error	StructureDefinition	If the structure is not abstract, then there SHALL be a baseDefinition : abstract = true or baseDefinition.exists()	Ensure that the base types are abstract
sdf-5	error	StructureDefinition	If the structure defines an extension then the structure must have context information : type != 'Extension' or derivation = 'specialization' or (context.exists())
sdf-9	error	StructureDefinition	In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) : children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.empty()	Because these 3 fields seem to be have overlapping meaning with the ones in the root of StructureDefinition
sdf-11	error	StructureDefinition	If there's a type, its content must match the path name in the first element of a snapshot : kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type	Ensure that the type is not inconsistent with the other information in the structure
sdf-15	error	StructureDefinition	The first element in a snapshot has no type unless model is a logical model. : kind!='logical' implies snapshot.element.first().type.empty()	No Type on the root element (snapshot)
sdf-16	error	StructureDefinition	All element definitions must have unique ids (snapshot) : snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-17	error	StructureDefinition	All element definitions must have unique ids (diff) : differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-18	error	StructureDefinition	Context Invariants can only be used for extensions : contextInvariant.exists() implies type = 'Extension'	contextInvariant
sdf-19	error	StructureDefinition	FHIR Specification models only use FHIR defined types : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')))	custom types only in logical models
sdf-21	error	StructureDefinition	Default values can only be specified on specializations : differential.element.defaultValue.exists() implies (derivation = 'specialization')	no default values on data types or resources
sdf-22	error	StructureDefinition	FHIR Specification models never have default values : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.empty() and differential.element.defaultValue.empty())	no default values on data types or resources
sdf-23	error	StructureDefinition	No slice name on root : (snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())	no sliceName on root

Snapshot View

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	0..*	StructureDefinition	Structural Definition sdf-0: Name should be usable as an identifier for the module by machine processing applications such as code generation sdf-1: Element paths must be unique unless the structure is a constraint sdf-15a: If the first element in a differential has no "." in the path and it's not a logical model, it has no type sdf-4: If the structure is not abstract, then there SHALL be a baseDefinition sdf-5: If the structure defines an extension then the structure must have context information sdf-6: A structure must have either a differential, or a snapshot (or both) sdf-9: In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) sdf-11: If there's a type, its content must match the path name in the first element of a snapshot sdf-14: All element definitions must have an id sdf-15: The first element in a snapshot has no type unless model is a logical model. sdf-16: All element definitions must have unique ids (snapshot) sdf-17: All element definitions must have unique ids (diff) sdf-18: Context Invariants can only be used for extensions sdf-19: FHIR Specification models only use FHIR defined types sdf-21: Default values can only be specified on specializations sdf-22: FHIR Specification models never have default values sdf-23: No slice name on root
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
inferenceExpression	S	0..1	Expression	CPG Inference Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
assertionExpression	S	0..1	Expression	CPG Assertion Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
featureExpression	S	0..1	Expression	CPG Feature Expression Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
caseFeatureOf	S	0..*	canonical()	CPG Case Feature Of Extension URL: http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	Σ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
identifier	Σ	0..*	Identifier	Additional identifier for the structure definition
version	Σ	0..1	string	Business version of the structure definition
name	ΣC	1..1	string	Name for this structure definition (computer friendly)
title	Σ	0..1	string	Name for this structure definition (human friendly)
status	?!Σ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	Σ	0..1	boolean	For testing purposes, not real usage
date	Σ	0..1	dateTime	Date last changed
publisher	Σ	0..1	string	Name of the publisher (organization or individual)
contact	Σ	0..*	ContactDetail	Contact details for the publisher
description		0..1	markdown	Natural language description of the structure definition
useContext	Σ	0..*	UsageContext	The context that the content is intended to support
jurisdiction	Σ	0..*	CodeableConcept	Intended jurisdiction for structure definition (if applicable) Binding: Jurisdiction ValueSet (extensible): Countries and regions within which this artifact is targeted for use.
purpose		0..1	markdown	Why this structure definition is defined
copyright		0..1	markdown	Use and/or publishing restrictions
keyword	Σ	0..*	Coding	Assist with indexing and finding Binding: DefinitionUseCodes (extensible): Codes for the meaning of the defined structure (SNOMED CT and LOINC codes, as an example).
fhirVersion	Σ	0..1	code	FHIR Version this StructureDefinition targets Binding: FHIRVersion (required): All published FHIR Versions.
mapping	C	0..*	BackboneElement	External specification that the content is mapped to sdf-2: Must have at least a name or a uri (or both)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
identity		1..1	id	Internal id when this mapping is used
uri	C	0..1	uri	Identifies what this mapping refers to
name	C	0..1	string	Names what this mapping refers to
comment		0..1	string	Versions, Issues, Scope limitations etc.
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing. Fixed Value: resource
abstract	Σ	1..1	boolean	Whether the structure is abstract Fixed Value: false
context	ΣC	0..*	BackboneElement	If an extension, where it can be used in instances
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
type	Σ	1..1	code	fhirpath | element | extension Binding: ExtensionContextType (required): How an extension context is interpreted.
expression	Σ	1..1	string	Where the extension can be used in instances
contextInvariant	ΣC	0..*	string	FHIRPath invariants - when the extension can be used
type	ΣC	1..1	uri	Type defined or constrained by this structure Binding: FHIRDefinedType (extensible): Either a resource or a data type, including logical model types.
baseDefinition	ΣC	0..1	canonical(StructureDefinition)	Definition that this type is constrained/specialized from
derivation	Σ	1..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition. Fixed Value: constraint
snapshot	C	0..1	BackboneElement	Snapshot view of the structure sdf-3: Each element definition in a snapshot must have a formal definition and cardinalities sdf-8: All snapshot elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models sdf-8b: All snapshot elements must have a base definition
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
element	C	1..*	ElementDefinition	Definition of elements in the resource (if no StructureDefinition) sdf-10: provide either a binding reference or a description (or both)
differential	C	0..1	BackboneElement	Differential view of the structure sdf-20: No slicing on the root element sdf-8a: In any differential, all the elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
element		1..*	ElementDefinition	Definition of elements in the resource (if no StructureDefinition)
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
StructureDefinition.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding http://hl7.org/fhir/ValueSet/languages from the FHIR Standard
StructureDefinition.status	required	PublicationStatus http://hl7.org/fhir/ValueSet/publication-status|4.0.1 from the FHIR Standard
StructureDefinition.jurisdiction	extensible	Jurisdiction ValueSet http://hl7.org/fhir/ValueSet/jurisdiction from the FHIR Standard
StructureDefinition.keyword	extensible	DefinitionUseCodes http://hl7.org/fhir/ValueSet/definition-use from the FHIR Standard
StructureDefinition.fhirVersion	required	FHIRVersion http://hl7.org/fhir/ValueSet/FHIR-version|4.0.1 from the FHIR Standard
StructureDefinition.kind	required	Fixed Value: resource http://hl7.org/fhir/ValueSet/structure-definition-kind|4.0.1 from the FHIR Standard
StructureDefinition.context.type	required	ExtensionContextType http://hl7.org/fhir/ValueSet/extension-context-type|4.0.1 from the FHIR Standard
StructureDefinition.type	extensible	FHIRDefinedType http://hl7.org/fhir/ValueSet/defined-types from the FHIR Standard
StructureDefinition.derivation	required	Fixed Value: constraint http://hl7.org/fhir/ValueSet/type-derivation-rule|4.0.1 from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	StructureDefinition	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	StructureDefinition	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	StructureDefinition	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	StructureDefinition	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
sdf-0	warning	StructureDefinition	Name should be usable as an identifier for the module by machine processing applications such as code generation : name.matches('[A-Z]([A-Za-z0-9_]){0,254}')
sdf-1	error	StructureDefinition	Element paths must be unique unless the structure is a constraint : derivation = 'constraint' or snapshot.element.select(path).isDistinct()
sdf-15a	error	StructureDefinition	If the first element in a differential has no "." in the path and it's not a logical model, it has no type : (kind!='logical' and differential.element.first().path.contains('.').not()) implies differential.element.first().type.empty()	No Type on the root element (differential)
sdf-2	error	StructureDefinition.mapping	Must have at least a name or a uri (or both) : name.exists() or uri.exists()
sdf-3	error	StructureDefinition.snapshot	Each element definition in a snapshot must have a formal definition and cardinalities : element.all(definition.exists() and min.exists() and max.exists())
sdf-4	error	StructureDefinition	If the structure is not abstract, then there SHALL be a baseDefinition : abstract = true or baseDefinition.exists()	Ensure that the base types are abstract
sdf-5	error	StructureDefinition	If the structure defines an extension then the structure must have context information : type != 'Extension' or derivation = 'specialization' or (context.exists())
sdf-6	error	StructureDefinition	A structure must have either a differential, or a snapshot (or both) : snapshot.exists() or differential.exists()
sdf-8	error	StructureDefinition.snapshot	All snapshot elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models : (%resource.kind = 'logical' or element.first().path = %resource.type) and element.tail().all(path.startsWith(%resource.snapshot.element.first().path&'.'))
sdf-9	error	StructureDefinition	In any snapshot or differential, no label, code or requirements on an element without a "." in the path (e.g. the first element) : children().element.where(path.contains('.').not()).label.empty() and children().element.where(path.contains('.').not()).code.empty() and children().element.where(path.contains('.').not()).requirements.empty()	Because these 3 fields seem to be have overlapping meaning with the ones in the root of StructureDefinition
sdf-10	error	StructureDefinition.snapshot.element	provide either a binding reference or a description (or both) : binding.empty() or binding.valueSet.exists() or binding.description.exists()	binding is required
sdf-11	error	StructureDefinition	If there's a type, its content must match the path name in the first element of a snapshot : kind != 'logical' implies snapshot.empty() or snapshot.element.first().path = type	Ensure that the type is not inconsistent with the other information in the structure
sdf-14	error	StructureDefinition	All element definitions must have an id : snapshot.element.all(id.exists()) and differential.element.all(id.exists())	elements have id
sdf-15	error	StructureDefinition	The first element in a snapshot has no type unless model is a logical model. : kind!='logical' implies snapshot.element.first().type.empty()	No Type on the root element (snapshot)
sdf-16	error	StructureDefinition	All element definitions must have unique ids (snapshot) : snapshot.element.all(id.exists()) and snapshot.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-17	error	StructureDefinition	All element definitions must have unique ids (diff) : differential.element.all(id.exists()) and differential.element.id.trace('ids').isDistinct()	element ids need to be unique
sdf-18	error	StructureDefinition	Context Invariants can only be used for extensions : contextInvariant.exists() implies type = 'Extension'	contextInvariant
sdf-19	error	StructureDefinition	FHIR Specification models only use FHIR defined types : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (differential.element.type.code.all(matches('^[a-zA-Z0-9]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')) and snapshot.element.type.code.all(matches('^[a-zA-Z0-9\\.]+$') or matches('^http:\\/\\/hl7\\.org\\/fhirpath\\/System\\.[A-Z][A-Za-z]+$')))	custom types only in logical models
sdf-20	error	StructureDefinition.differential	No slicing on the root element : element.where(path.contains('.').not()).slicing.empty()	no slicing on root
sdf-21	error	StructureDefinition	Default values can only be specified on specializations : differential.element.defaultValue.exists() implies (derivation = 'specialization')	no default values on data types or resources
sdf-22	error	StructureDefinition	FHIR Specification models never have default values : url.startsWith('http://hl7.org/fhir/StructureDefinition') implies (snapshot.element.defaultValue.empty() and differential.element.defaultValue.empty())	no default values on data types or resources
sdf-23	error	StructureDefinition	No slice name on root : (snapshot | differential).element.all(path.contains('.').not() implies sliceName.empty())	no sliceName on root
sdf-8a	error	StructureDefinition.differential	In any differential, all the elements must start with the StructureDefinition's specified type for non-logical models, or with the same type name for logical models : (%resource.kind = 'logical' or element.first().path.startsWith(%resource.type)) and (element.tail().empty() or element.tail().all(path.startsWith(%resource.differential.element.first().path.replaceMatches('\\..*','')&'.')))
sdf-8b	error	StructureDefinition.snapshot	All snapshot elements must have a base definition : element.all(base.exists())

This structure is derived from StructureDefinition

Summary

Mandatory: 1 element
Must-Support: 4 elements
Fixed: 3 elements

Extensions

This structure refers to these extensions:

• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-inferenceExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-assertionExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-featureExpression
• http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureOf

Other representations of profile: CSV, Excel, Schematron