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FHIR Uniform Resource Identifier (URI)

A Uniform Resource Identifier (URI) is a globally unique string of characters that provides a simple and extensible means for identifying a resource. URIs are used to identify a namespace or the location of a resource. URIs are human-readable and offer the potential for resolvability. The HL7 FHIR® specification recommends using URIs to have all resources resolvable and to comply with the FHIR RESTful paradigm.

URI Registration Process

  1. Requestor shall first check that the URI does not already exist in the Canadian URI Project, Jurisdictional Registry (if exists) or HL7 FHIR Specification
  2. FHIR URIs must not be proposed for Subsets to be published on the Terminology Gateway as they will be generated automatically.
  3. Requestor shall contact the owner or respresentative for either:
  4. Forum posts shall have the following format:

    Subject: New URI Request
    • Description: “A description of the URI”
    • Responsible Body & Contact Information
    • Proposed FHIR URI: URI as per URI Guidelines
    • Existing OID (if exists)
    • To be published (optional): Jurisidictional repository/ Canadian URI Registry
  5. There will be a wait period of five business days for the communities to react to the forum post with comments, questions or requests for clarification.
  6. Update Forum post will be updated with the new URI.
  7. Publishing the URI in the Canadian URI Registry and Jurisdictional Registry. This is highly recommended to prevent any misuse or duplication of URIs but it is optional.

See a flowchart of the FHIR URI Registration Process (pdf).

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