http://hl7.org/fhir/StructureDefinition/structuredefinition-template-status|5.2.0

Status code taken from [HL7 template specification](http://www.hl7.org/implement/standards/product_brief.cfm?product_id=377) - allows for alignment with the template DSTU, and has more authoring status codes.
element_idtypes
Extension
Extension.extension
Extension.url
Extension.value[x]
Extension
Extension.id
Extension.extension
Extension.url
Extension.value[x]