Optional
_endpointOptional
_headerUsage depends on the channel type
Optional
_payloadMIME type to send, or omit for no payload
Optional
_typerest-hook | websocket | email | sms | message
Optional
endpointWhere the channel points to
Optional
extensionAdditional content defined by implementations
Optional
headerUsage depends on the channel type
Optional
idUnique id for inter-element referencing
Optional
modifierExtensions that cannot be ignored even if unrecognized
Optional
payloadMIME type to send, or omit for no payload
rest-hook | websocket | email | sms | message
Where the channel points to