FHIR PSI extensions
- Rodolfo Melia
- Carlos
It is planned to have, at least, two extensions for the Patient resource:
PSI Global Extension for PSI Client Country. In order to link one client/patient to one country(potential URI
https://standards.psi-mis.org/fhir/global/core/StructureDefinition/psi-client-country)Current expected values
PSI Global Extension for PSI Client Project. In order to store the relation between a client (patient) and a project during a period of time. (potential URI
https://standards.psi-mis.org/fhir/global/core/StructureDefinition/psi-project)Current expected values
StructureDefinition as FHIR resource for profiles and extensions
A StructureDefinition is what you build when you build a profile/extension. The StructureDefinition contains rules about how a resource (or type) and its data elements are used in a particular context.
A StructureDefinition is a definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions, profiles and constraints on resources and data types.
A StructureDefinition could contain a differential statement, which describes the differences compared to the base structure.
How to add an extension or a profile
Send a POST request to StructureDefinition endpoint
FHIR validation
The validate operation ($validate) checks whether the attached content would be acceptable either generally, as a create, an update or as a delete to an existing resource. See more details in Resource-operation-validate - FHIR v5.0.0
For instance, send a POST request to https://fhir-dev.psi-mis.org/fhir/Patient/$validate with the Patient resource in JSON as body.
Any FHIR instance may declare it adheres to a StructureDefinition, by adding the canonical url (StructureDefinition.url) to the instances meta.profile as shown below. Servers may pick this up on a POST and validate the instance against the stated profile (http://example.org/StructureDefinition/PatientNL):
<Patient>
<id value="44Q3"/>
<meta>
<profile value="http://example.org/StructureDefinition/PatientNL"/>
</meta>
</Patient>Also, it could be an operation to a resource that it is already uploaded in the server:
https://fhir-dev.psi-mis.org/fhir/Patient/150/$validate