Referencing FHIR Resources

Referenced resources in Composition (e.g., Composition.subject references a Patient resource, Composition.author references a PractitionerRole resource, etc.) SHALL exist as entries in the Bundle. The following approach is used in PS-AB for referencing resources in the Bundle:

• The Bundle.entry.fullURL SHALL use urn:uuid
• The UUID used in fullURL SHALL be used in Reference.reference to reference the corresponding FHIR resource in the Bundle
• The UUID used in fullURL SHOULD also be assigned as the Resource.id

Note: The Bundle.id assigned by patient summary submitter (e.g., EMR) will be ignored by the recipient (e.g. CII) when a HTTP POST is done (i.e., a new UUID will be assigned by the recipient for Bundle.id).