This page is part of the Canonical Resource Management Infrastructure Implementation Guide (v1.0.0-ballot: STU1 Ballot 1) based on FHIR R4. . For a full list of available versions, see the Directory of published versions

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• Detailed Descriptions
• Mappings
• Examples
• XML
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Resource Profile: CRMI Shareable StructureDefinition

Enforces the minimum information set for the structure definition metadata required by HL7 and other organizations that share and publish structure definitions

Usage:

• Derived from this Resource Profile: CRMI Publishable StructureDefinition
• Examples for this Resource Profile: Specifichealthconcerns

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		1..1	StructureDefinition	Structural Definition
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
url	S	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
version	S	1..1	string	Business version of the structure definition
name	S	1..1	string	Name for this structure definition (computer friendly)
title	S	1..1	string	Name for this structure definition (human friendly)
status	S	1..1	code	draft | active | retired | unknown
experimental	S	1..1	boolean	For testing purposes, not real usage
publisher	S	0..1	string	Name of the publisher (organization or individual)
description	S	1..1	markdown	Natural language description of the structure definition
Documentation for this format

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	1..1	StructureDefinition	Structural Definition
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	SΣ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
version	SΣ	1..1	string	Business version of the structure definition
name	SΣC	1..1	string	Name for this structure definition (computer friendly)
title	SΣ	1..1	string	Name for this structure definition (human friendly)
status	?!SΣ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	SΣ	1..1	boolean	For testing purposes, not real usage
publisher	SΣ	0..1	string	Name of the publisher (organization or individual)
description	S	1..1	markdown	Natural language description of the structure definition
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing.
abstract	Σ	1..1	boolean	Whether the structure is abstract
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.
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet
StructureDefinition.status	required	PublicationStatus
StructureDefinition.kind	required	StructureDefinitionKind
StructureDefinition.type	extensible	FHIRDefinedType

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	1..1	StructureDefinition	Structural Definition
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
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	SΣ	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	SΣ	1..1	string	Business version of the structure definition
name	SΣC	1..1	string	Name for this structure definition (computer friendly)
title	SΣ	1..1	string	Name for this structure definition (human friendly)
status	?!SΣ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	SΣ	1..1	boolean	For testing purposes, not real usage
date	Σ	0..1	dateTime	Date last changed
publisher	SΣ	0..1	string	Name of the publisher (organization or individual)
contact	Σ	0..*	ContactDetail	Contact details for the publisher
description	S	1..1	markdown	Natural language description of the structure definition
useContext	ΣTU	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
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.
abstract	Σ	1..1	boolean	Whether the structure is abstract
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	0..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition.
snapshot	C	0..1	BackboneElement	Snapshot view of the structure
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)
differential	C	0..1	BackboneElement	Differential view of the structure
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
StructureDefinition.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding
StructureDefinition.status	required	PublicationStatus
StructureDefinition.jurisdiction	extensible	Jurisdiction ValueSet
StructureDefinition.keyword	extensible	DefinitionUseCodes
StructureDefinition.fhirVersion	required	FHIRVersion
StructureDefinition.kind	required	StructureDefinitionKind
StructureDefinition.context.type	required	ExtensionContextType
StructureDefinition.type	extensible	FHIRDefinedType
StructureDefinition.derivation	required	TypeDerivationRule

Constraints

Id	Grade	Path(s)	Details	Requirements
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-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-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-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-20	error	StructureDefinition.differential	No slicing on the root element : element.where(path.contains('.').not()).slicing.empty()	no slicing 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: 5 elements
Must-Support: 13 elements

Extensions

This structure refers to these extensions:

• http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability
• http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel
• http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
• http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm
• http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy

Maturity: 3

Differential View

This structure is derived from StructureDefinition

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition		1..1	StructureDefinition	Structural Definition
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
url	S	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
version	S	1..1	string	Business version of the structure definition
name	S	1..1	string	Name for this structure definition (computer friendly)
title	S	1..1	string	Name for this structure definition (human friendly)
status	S	1..1	code	draft | active | retired | unknown
experimental	S	1..1	boolean	For testing purposes, not real usage
publisher	S	0..1	string	Name of the publisher (organization or individual)
description	S	1..1	markdown	Natural language description of the structure definition
Documentation for this format

Key Elements View

Name	Flags	Card.	Type	Description & Constraints
StructureDefinition	C	1..1	StructureDefinition	Structural Definition
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	SΣ	1..1	uri	Canonical identifier for this structure definition, represented as a URI (globally unique)
version	SΣ	1..1	string	Business version of the structure definition
name	SΣC	1..1	string	Name for this structure definition (computer friendly)
title	SΣ	1..1	string	Name for this structure definition (human friendly)
status	?!SΣ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	SΣ	1..1	boolean	For testing purposes, not real usage
publisher	SΣ	0..1	string	Name of the publisher (organization or individual)
description	S	1..1	markdown	Natural language description of the structure definition
kind	Σ	1..1	code	primitive-type | complex-type | resource | logical Binding: StructureDefinitionKind (required): Defines the type of structure that a definition is describing.
abstract	Σ	1..1	boolean	Whether the structure is abstract
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.
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet
StructureDefinition.status	required	PublicationStatus
StructureDefinition.kind	required	StructureDefinitionKind
StructureDefinition.type	extensible	FHIRDefinedType

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	1..1	StructureDefinition	Structural Definition
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
knowledgeCapability	S	0..*	code	shareable | computable | publishable | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability Binding: KnowledgeCapabilityValues (required)
knowledgeRepresentationLevel	S	0..*	code	narrative | semi-structured | structured | executable URL: http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel Binding: KnowledgeRepresentationLevelValues (required)
artifactComment	S	0..*	(Complex)	Additional documentation, review, or usage guidance URL: http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
versionAlgorithm	S	0..1	string, Coding	How to compare versions URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Binding: VersionAlgorithm (extensible): The algorithm used to compare versions for the artifact
versionPolicy	S	0..1	Coding	metadata | strict URL: http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy Binding: Artifact Version Policy Values (extensible): The versioning policy of the artifact
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
url	SΣ	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	SΣ	1..1	string	Business version of the structure definition
name	SΣC	1..1	string	Name for this structure definition (computer friendly)
title	SΣ	1..1	string	Name for this structure definition (human friendly)
status	?!SΣ	1..1	code	draft | active | retired | unknown Binding: PublicationStatus (required): The lifecycle status of an artifact.
experimental	SΣ	1..1	boolean	For testing purposes, not real usage
date	Σ	0..1	dateTime	Date last changed
publisher	SΣ	0..1	string	Name of the publisher (organization or individual)
contact	Σ	0..*	ContactDetail	Contact details for the publisher
description	S	1..1	markdown	Natural language description of the structure definition
useContext	ΣTU	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
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.
abstract	Σ	1..1	boolean	Whether the structure is abstract
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	0..1	code	specialization | constraint - How relates to base definition Binding: TypeDerivationRule (required): How a type relates to its baseDefinition.
snapshot	C	0..1	BackboneElement	Snapshot view of the structure
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)
differential	C	0..1	BackboneElement	Differential view of the structure
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
StructureDefinition.language	preferred	CommonLanguages Additional Bindings Purpose AllLanguages Max Binding
StructureDefinition.status	required	PublicationStatus
StructureDefinition.jurisdiction	extensible	Jurisdiction ValueSet
StructureDefinition.keyword	extensible	DefinitionUseCodes
StructureDefinition.fhirVersion	required	FHIRVersion
StructureDefinition.kind	required	StructureDefinitionKind
StructureDefinition.context.type	required	ExtensionContextType
StructureDefinition.type	extensible	FHIRDefinedType
StructureDefinition.derivation	required	TypeDerivationRule

Constraints

Id	Grade	Path(s)	Details	Requirements
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-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-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-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-20	error	StructureDefinition.differential	No slicing on the root element : element.where(path.contains('.').not()).slicing.empty()	no slicing 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: 5 elements
Must-Support: 13 elements

Extensions

This structure refers to these extensions:

• http://hl7.org/fhir/StructureDefinition/cqf-knowledgeCapability
• http://hl7.org/fhir/StructureDefinition/cqf-knowledgeRepresentationLevel
• http://hl7.org/fhir/StructureDefinition/cqf-artifactComment
• http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm
• http://hl7.org/fhir/StructureDefinition/artifact-versionPolicy

Maturity: 3

Other representations of profile: CSV, Excel, Schematron