<status value="draft" /> <date value="2019-10-16" /> <description value="Reference to specific elements of the target resource. Can optionally provide the changed values of the element (old and new)" /> <purpose value="reference specific elements in the target resource using valueUri" /> <fhirVersion value="4.0.0" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Reference" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <short value="Reference to specific elements of the target resource" /> <definition value="Reference to specific elements of the target resource. Can optionally provide the changed values of the element (old and new)" /> </element> <element id="Extension.extension"> <path value="Extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Extension.extension:elementUri"> <path value="Extension.extension" /> <sliceName value="elementUri" /> <max value="1" /> </element> <element id="Extension.extension:elementUri.url"> <path value="Extension.extension.url" /> <fixedUri value="elementUri" /> </element> <element id="Extension.extension:elementUri.value[x]"> <path value="Extension.extension.value[x]" /> <short value="Reference to the specific element of the target resource" /> <definition value="Reference to the specific element of the target resource" /> <type> <code value="uri" /> </type> <example> <label value="Full uri syntax" /> <valueUri value="gender/gender1" /> </example> <example> <label value="hashtag id syntax" /> <valueUri value="#gender1" /> </example> </element> <element id="Extension.extension:change"> <path value="Extension.extension" /> <sliceName value="change" /> <short value="The old and new value of the changed element" /> <definition value="The old and new value of the changed element" /> <max value="1" /> </element> <element id="Extension.extension:change.extension"> <path value="Extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Extension.extension:change.extension:oldValue"> <path value="Extension.extension.extension" /> <sliceName value="oldValue" /> <max value="1" /> </element> <element id="Extension.extension:change.extension:oldValue.url"> <path value="Extension.extension.extension.url" /> <fixedUri value="oldValue" /> </element> <element id="Extension.extension:change.extension:oldValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The old value of the element" /> <definition value="The old value of the element" /> </element> <element id="Extension.extension:change.extension:newValue"> <path value="Extension.extension.extension" /> <sliceName value="newValue" /> <max value="1" /> </element> <element id="Extension.extension:change.extension:newValue.url"> <path value="Extension.extension.extension.url" /> <fixedUri value="newValue" /> </element> <element id="Extension.extension:change.extension:newValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The new value of the element" /> <definition value="The new value of the element" /> </element> <element id="Extension.extension:change.url"> <path value="Extension.extension.url" /> <fixedUri value="change" /> </element> <element id="Extension.extension:change.value[x]"> <path value="Extension.extension.value[x]" /> <max value="0" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://hl7.no/fhir/StructureDefinition/reference-targetElement" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <max value="0" /> </element> </differential> </StructureDefinition>