eReferral Implementation Guide, published by Riziv-Inami Platform. This guide is not an authorized publication; it is the continuous build for version 2.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-be/referral-uhmep/ and changes regularly. See the Directory of published versions

Profile Rewriting

This page documents the profile rewriting applied by the eReferral FHIR Gateway when it receives resources that declare a federal eHealth DRP profile.

Purpose

The eReferral API validates incoming resources against the internal eReferral Implementation Guide profiles. Some senders may still declare the corresponding federal eHealth DRP profile URL in meta.profile. To keep the API validation path consistent, the gateway rewrites supported federal profile URLs to their internal eReferral profile URL before the resource is processed by the eReferral API.

This rewrite is a technical compatibility step. It does not change the clinical or business content of the resource.

Scope

The rewriting applies to the profile URLs declared on incoming ServiceRequest resources. When one of the supported eHealth DRP profile URLs is present in ServiceRequest.meta.profile, the gateway replaces it with the matching eReferral profile URL.

The currently supported mappings are:

Gateway Behavior

When a request is received, the gateway inspects the resource profile declarations before forwarding the resource to the internal eReferral API.

If a supported eHealth DRP profile is found:

1. the eHealth DRP profile URL is removed from ServiceRequest.meta.profile;
2. the corresponding eReferral profile URL is added to ServiceRequest.meta.profile;
3. the resource is then processed and validated as an eReferral resource.

If the resource already declares the eReferral profile URL, no rewrite is needed for that profile. If the resource declares an unsupported profile URL, the gateway does not infer an eReferral profile from it.

Example

Incoming resource profile:

{
  "resourceType": "ServiceRequest",
  "meta": {
    "profile": [
      "https://www.ehealth.fgov.be/standards/fhir/referral/StructureDefinition/be-referral-servicerequest-diagnosticimaging"
    ]
  }
}

Profile after gateway rewriting:

{
  "resourceType": "ServiceRequest",
  "meta": {
    "profile": [
      "https://www.riziv-inami.be/standards/fhir/ereferral/StructureDefinition/ereferral-servicerequest-diagnosticimaging"
    ]
  }
}

Validation Impact

After rewriting, validation is performed against the eReferral profile. Implementers should therefore make sure that resources sent with a federal eHealth DRP profile also satisfy the stricter eReferral profile constraints where applicable.

The rewrite only addresses the canonical profile URL used for routing and validation. It does not automatically transform elements, terminology, cardinalities, extensions, or business data.

Implementation Notes

Implementers sending resources directly to the eReferral API should preferably use the eReferral profile URL in ServiceRequest.meta.profile. The rewrite exists to support systems that still identify the request by its federal eHealth DRP profile.

Systems that log or audit incoming requests may record both values: the profile received at the gateway boundary and the profile used internally after rewriting.