{description: Code that identifies the event this message represents and connects it with its definition., package_name: ca.on.oh-seris-r4, name: MessageEventCode, type: null, package_version: 1.1.0-snapshot1, class: unknown, kind: null, url: 'http://ontariohealth.ca/fhir/CodeSystem/message-event-code', version: 1.0.0}