<status value="draft" /> <date value="2022-04-29T08:28:05.5731171+00:00" /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="ClinicalImpression" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <short value="有效期限" /> <definition value="有效期限可以是时间范围，也可以使用时长表示。" /> <max value="1" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="https://simplifier.net/winningtest/extension-valid-term" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <type> <code value="dateTime" /> </type> <type> <code value="Duration" /> </type> <type> <code value="Period" /> </type> </element> </differential> </StructureDefinition>