Broken out from FHIR-42644:

We appreciate NDH's inclusion of IHE profiling and work in the mCSD profile and Topologies whitepaper in the section on discovery of endpoints: 3.6 Discovery a HIE Endpoint via the NDH.

The use case in NDH 3.6 currently shows how to use the IHE code HIEResponder in OrganizationAffiliation.code to reflect that an Organization is reachable through a given HIE, and OrganizationAffiliation.endpoint reflects dedicated endpoints to this Organization other members of the HIE can use if appropriate.

This ticket is to request the IHE code HIEInitiator as well, on OrganizationAffiliation.code. This supports discovering whether an Organization is eligible to act as a client in an HIE, and OrganizationAffiliation.endpoint reflects central HIE endpoints it can use if appropriate.

The IHE profiling is available in full at https://profiles.ihe.net/ITI/papers/Topologies/index.html