<status value="draft" /> <description value="Some referral processes may ask the referrer to provide some data that impacts the performer's automated referral processing rules. The rules for how a performer processes their referrals can be unique to the performer. Some examples include routing based on: - The type of referrer (from the hospital, primary care, out of province, etc...) - The patient's Postal Code FSA (e.g., K8N, L0L, etc...) - The first letter of the patient's last name (e.g., A-J, K-Z) To handle this, use this extension, which is included in both the ServiceRequest AND MessageHeader (for add-service-request event) resources. By also including the extension in the MessageHeader, it makes it easier for implementers to find the key routing-related data fields without needing to dig further into the referral payload. **Note**: When the eReferral process is combined with a service directory, the directory should be able to publish the valueSet of referral options that are available for a selected service." /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="ServiceRequest" /> </context> <context> <type value="element" /> <expression value="MessageHeader" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <definition value="For Referral Source Type identification. Only one referral routing object is expected." /> </element> <element id="Extension.extension"> <path value="Extension.extension" /> <max value="0" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://fhir.infoway-inforoute.ca/io/CA-eReC/StructureDefinition/Routing-Options-EXT" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <type> <code value="CodeableConcept" /> </type> <binding> <strength value="required" /> <valueSet value="http://fhir.infoway-inforoute.ca/io/CA-eReC/ValueSet/referral-source-types" /> </binding> </element> </differential> </StructureDefinition>