<status value="draft" /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Observation" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" /> <derivation value="constraint" /> <differential> <element id="Observation"> <path value="Observation" /> </element> <element id="Observation.effective[x]"> <path value="Observation.effective[x]" /> <type> <code value="dateTime" /> </type> </element> <element id="Observation.value[x]"> <path value="Observation.value[x]" /> <type> <code value="Quantity" /> </type> </element> </differential> </StructureDefinition>