<status value="active" /> <date value="2023-07-13" /> <description value="This username is associated with the patient for the purpose of identifying him/her into different apps they will use and to share this username between parties that will manage usernames and identify the patient by username" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Patient" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <short value="Patient username" /> <definition value="This username is associated with the patient for the purpose of identifying him/her into different apps they will use and to share this username between parties that will manage usernames and identify the patient by username" /> <mustSupport value="true" /> <isModifier value="false" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://clouddx.com/fhir/StructureDefinition/patient-username" /> </element> <element id="Extension.valueString"> <path value="Extension.valueString" /> <short value="The string value" /> <min value="1" /> <type> <code value="string" /> </type> <mustSupport value="true" /> </element> </differential> </StructureDefinition>