Optional
_endpointOptional
_nameName of system
Optional
_softwareName of software running the system
Optional
_versionVersion of software running
Optional
contactHuman contact for problems
Actual message source address or id
Optional
extensionAdditional content defined by implementations
Optional
idUnique id for inter-element referencing
Optional
modifierExtensions that cannot be ignored even if unrecognized
Optional
nameName of system
Optional
softwareName of software running the system
Optional
versionVersion of software running
Actual message source address or id