This is the CodeSystem that contains codes in both SubscriptionChannel Type Codes (http://terminology.hl7.org/CodeSystem/subscription-channel-type) and SubscriptionChannel Type Codes (http://terminology.hl7.org/CodeSystem/subscription-channel-type).
This code system http://hl7.org/fhir/comparison/CodeSystem/2c77c26f-0eba-4543-89eb-09eda3cba01c-1605 defines codes, but no codes are represented here
| Code | Display | Definition |
| rest-hook | Rest Hook | The channel is executed by making a POST to the URI with the selected payload and MIME type. |
| websocket | Websocket | The channel is executed by sending a packet across a web socket connection maintained by the client. The URL identifies the websocket, and the client binds to this URL. |
| email | Email | The channel is executed by sending an email to the email addressed in the URI (which must be a mailto:). |
| message | Message | The channel is executed by sending a message (e.g. a Bundle with a MessageHeader resource etc.) to the application identified in the URI. |