Shared Health Specification and Guide Version 5.0

 

Definitions for the dtprofile-reference Profile.

1. Reference
Definition

A reference from one resource to another.

Control0..*
Max Length0
InvariantsDefined on this element
ref-1: SHALL have a local reference if the resource is provided inline (: reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids')))
2. Reference.id
Definition

unique id for the element within a resource (for internal references).

Control0..1
Typeid
Max Length0
3. Reference.extension
Definition

May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

Control0..*
TypeExtension
Alternate Namesextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Max Length0
4. Reference.reference
Definition

A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.

Control1..1 This element is affected by the following invariants: ref-1
Typestring
Must Supporttrue
Comments

Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.

Max Length0
5. Reference.display
Definition

Plain text narrative that identifies the resource in addition to the resource reference.

Control0..1
Typestring
Comments

This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.

Max Length0