<status value="draft" /> <description value="A FHIR Task profile for GAP requests. The Task must have at least one identifier." /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Task" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Task" /> <derivation value="constraint" /> <differential> <element id="Task.id"> <path value="Task.id" /> <min value="1" /> <constraint> <key value="gap-task-id-format" /> <severity value="error" /> <human value="Task id must be a valid GUID (non-empty)" /> <expression value="matches('^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$')" /> <source value="http://akinox.com/fhir/StructureDefinition/gap-task-profile" /> </constraint> </element> <element id="Task.identifier"> <path value="Task.identifier" /> <min value="1" /> </element> <element id="Task.identifier.system"> <path value="Task.identifier.system" /> <min value="1" /> <patternUri value="http://vitr.ai/orientation-identifier" /> </element> </differential> </StructureDefinition>