<status value="draft" /> <date value="2018-11-14" /> <publisher value="Health Level Seven Australia (Medications WG)" /> <contact> <telecom> <system value="url" /> <value value="http://hl7.org.au/fhir" /> <use value="work" /> </telecom> </contact> <description value="This extension applies to the MedicationAdministration resource and provides a reference to a practitioner (perhaps in a role) that witnessed the administration of a medication." /> <fhirVersion value="3.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <contextType value="resource" /> <context value="MedicationAdministration.performer" /> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"> <valueCode value="draft" /> </extension> <path value="Extension" /> <short value="Medication administration witness" /> <definition value="Reference to a practitioner (perhaps in a role) that witnessed the administration of a medication" /> <min value="0" /> <max value="*" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://hl7.org.au/fhir/StructureDefinition/medication-administration-witness" /> </element> <element id="Extension.value[x]:valueReference"> <path value="Extension.value[x]" /> <sliceName value="valueReference" /> <short value="Witness to administration" /> <definition value="Reference to a practitioner (perhaps in a role) that witnessed the administration of a medication" /> <min value="1" /> <type> <code value="Reference" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/PractitionerRole" /> </type> <type> <code value="Reference" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner" /> </type> </element> </differential> </StructureDefinition>