http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-careOf|4.0.1

The name of the party who will take receipt at the specified address, and will take on responsibility for ensuring delivery to the target recipient.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/string