http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice|5.2.0
Mark that an invariant represents 'best practice' rule - a rule that implementers may choose to enforce at error level in some or all circumstances.
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 0
Elements
extension: Extension
value[x]: boolean,CodeableConcept