idNostringUnique id for inter-element referencing
extensionNoExtension[]Additional content defined by implementations
typeYesCoding[]Indication of the reason the entity signed the object(s)
whenYesinstantWhen the signature was created
whoYesReference<Practitioner / PractitionerRole / RelatedPerson / Patient / Device / Organization>Who signed
onBehalfOfNoReference<Practitioner / PractitionerRole / RelatedPerson / Patient / Device / Organization>The party represented
targetFormatNocodeThe technical format of the signed resources
sigFormatNocodeThe technical format of the signature
dataNobase64BinaryThe actual signature content (XML DigSig. JWS, picture, etc.)