This case-sensitive code system http://hl7.org/fhir/us/ndh/CodeSystem/EndpointHieSpecificConnectionTypeCS defines the following codes:

Code	Definition
XCPD-InitGateway-PatientDiscovery-AsyncResponse	XCPD InitiatingGateway ITI-55 Cross Gateway Patient Discovery Asynchronous Response
XCPD-RespGateway-PatientDiscovery	XCPD RespondingGateway ITI-55 Cross Gateway Patient Discovery Synchronous
XCPD-RespGateway-PatientDiscovery-Async	XCPD RespondingGateway ITI-55 Cross Gateway Patient Discovery Asynchronous
XCA-InitGateway-Query	XCA InitiatingGateway ITI-18 Registry Stored Query Synchronous
XCA-InitGateway-Retrieve	XCA InitiatingGateway ITI-43 Retrieve Document Set Synchronous
XCA-InitGateway-Query-Async	XCA InitiatingGateway ITI-18 Registry Stored Query Asynchronous
XCA-InitGateway-Retrieve-Async	XCA InitiatingGateway ITI-43 Retrieve Document Set Asynchronous
XCA-InitGateway-Query-AsyncResponse	XCA InitiatingGateway ITI-38 Cross Gateway Query Asynchronous Response
XCA-InitGateway-Retrieve-AsyncResponse	XCA InitiatingGateway ITI-39 Cross Gateway Retrieve Asynchronous Response
XCA-RespGateway-Query	XCA RespondingGateway ITI-38 Cross Gateway Query Synchronous
XCA-RespGateway-Retrieve	XCA RespondingGateway ITI-39 Cross Gateway Retrieve Synchronous
XCA-RespGateway-Query-Async	XCA RespondingGateway ITI-38 Cross Gateway Query Asynchronous
XCA-RespGateway-Retrieve-Async	XCA RespondingGateway ITI-39 Cross Gateway Retrieve Asynchronous
XDS-Registry-Feed	XDS Registry ITI-8 Patient Identity Feed Synchronous
XDS-Registry-Feed-v3	XDS Registry ITI-44 Patient Identity Feed HL7v3 Synchronous
XDS-Registry-Register	XDS Registry ITI-42 Register Document Set-b Synchronous
XDS-Registry-Query	XDS Registry ITI-18 Registry Stored Query Synchronous
XDS-Registry-RegOnDemand	XDS Registry ITI-61 Register On-Demand Document Entry Synchronous
XDS-Registry-Register-Async	XDS Registry ITI-42 Register Document Set-b Asynchronous
XDS-Registry-Query-Async	XDS Registry ITI-18 Registry Stored Query Asynchronous
XDS-Registry-RegOnDemand-Async	XDS Registry ITI-61 Register On-Demand Document Entry Asynchronous
XDS-Repository-ProvideReg	XDS Repository ITI-41 Provide&Register Document Set-b Synchronous
XDS-Repository-Retrieve	XDS Repository/IntegratedSourceRepository ITI-43 Retrieve Document Set Synchronous
XDS-Repository-ProvideReg-Async	XDS Repository ITI-41 Provide&Register Document Set-b Asynchronous
XDS-Repository-Retrieve-Async	XDS Repository/IntegratedSourceRepository ITI-43 Retrieve Document Set Asynchronous
XDS-Repository-Register-AsyncResponse	XDS Repository/IntegratedSourceRepository ITI-42 Register Document Set-b Asynchronous Response
XDS-OnDemandSource-Retrieve	XDS OnDemandSource ITI-43 Retrieve Document Set Synchronous
XDS-OnDemandSource-Retrieve-Async	XDS OnDemandSource ITI-43 Retrieve Document Set Asynchronous
XDS-OnDemandSource-RegOnDemand-AsyncResponse	XDS OnDemandSource ITI-61 Register On-Demand Document Entry Asynchronous Response
XDS-Source-ProvideReg-AsyncResponse	XDS Document Source ITI-41 Provide&Register Document Set-b Asynchronous Response
XDS-Consumer-Query-AsyncResponse	XDS Document Consumer ITI-18 Registry Stored Query Asynchronous Response
XDS-Consumer-Retrieve-AsyncResponse	XDS Document Consumer ITI-43 Retrieve Document Set Asynchronous Response
PDQ-Supplier-Query	PDQ Patient Demographics Supplier ITI-21 Patient Demographics Query Synchronous
PDQ-Supplier-VisitQuery	PDQ Patient Demographics Supplier ITI-22 Patient Demographics and Visit Query Synchronous
PIX-Xmanager-Feed	PIX Patient Identity Cross-Reference Manager ITI-8 Patient Identity Feed Synchronous
PIX-Xmanager-Feed-v3	PIX Patient Identity Cross-Reference Manager ITI-30 Patient Identity Management Synchronous
PIX-Xmanager-Query	PIX Patient Identity Cross-Reference Manager ITI-9 PIX Query Synchronous
PIX-Consumer	PIX Patient Identifier Cross-reference Consumer ITI-10 PIX Update Notification Synchronous
XDR-Recipient-ProvideReg	XDR Document Recipient ITI-41 Provide and Register Document Set-B Synchronous
MHD-Recipient-ProvideReg	MHD Document Recipient ITI-65 Provide Document Bundle