FHIR Tooling Extensions IG, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 1.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/fhir-tools-ig/ and changes regularly. See the Directory of published versions

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Extension: Id Expectation Extension

Specifies whether a particular element or resource is expected to have an id or not. Note that this can be done in a profile on the element, but it is sometimes useful to say this e.g. on an abstract element in a logical model

Context of Use

This extension may be used on the following element(s)

• Element ID: ElementDefinition
• Element ID: ElementDefinition.type

Usage info

Usages:

• Examples for this Extension: CDSHookAppointmentBookContext, CDSHookOrderDispatchContext, CDSHookOrderSelectContext, CDSHookOrderSignContext and CDSHooksRequest

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

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

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..*	Extension	Whether a resource or an element should have an id
extension		0..0		Extension
url		1..1	uri	"http://hl7.org/fhir/tools/StructureDefinition/id-expectation"
value[x]		1..1	code	Value of extension Binding: Id Expectation Set (required)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	required	Id Expectation Set	📦1.1.0	This IG

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..*	Extension	Whether a resource or an element should have an id
id		0..1	id	Unique id for inter-element referencing
extension		0..0		Extension Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/tools/StructureDefinition/id-expectation"
value[x]		1..1	code	Value of extension Binding: Id Expectation Set (required)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	required	Id Expectation Set	📦1.1.0	This IG

Constraints

Id	Grade	Path(s)	Description	Expression
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()

Summary

Simple Extension with the type code: Specifies whether a particular element or resource is expected to have an id or not. Note that this can be done in a profile on the element, but it is sometimes useful to say this e.g. on an abstract element in a logical model

Maturity: 4

Differential ViewDifferential View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..*	Extension	Whether a resource or an element should have an id
extension		0..0		Extension
url		1..1	uri	"http://hl7.org/fhir/tools/StructureDefinition/id-expectation"
value[x]		1..1	code	Value of extension Binding: Id Expectation Set (required)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	required	Id Expectation Set	📦1.1.0	This IG

Snapshot View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..*	Extension	Whether a resource or an element should have an id
id		0..1	id	Unique id for inter-element referencing
extension		0..0		Extension Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/tools/StructureDefinition/id-expectation"
value[x]		1..1	code	Value of extension Binding: Id Expectation Set (required)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Extension.value[x]	Base	required	Id Expectation Set	📦1.1.0	This IG

Constraints

Id	Grade	Path(s)	Description	Expression
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()

Summary

Simple Extension with the type code: Specifies whether a particular element or resource is expected to have an id or not. Note that this can be done in a profile on the element, but it is sometimes useful to say this e.g. on an abstract element in a logical model

Maturity: 4

Other representations of profile: CSV, Excel, Schematron