http://hl7.org/fhir/StructureDefinition/task-candidateList|5.2.0

Identifies the individuals who are candidates for being the owner of the task. Use Task.requestedPerformer in R5+
element_idtypes
Extension
Extension.extension
Extension.url
Extension.value[x]
Extension
Extension.id
Extension.extension
Extension.url
Extension.value[x]