Union of http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement and http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement

This is the set of resources that conform to either of the profiles QI-Core Key Element Extension (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement) and QI-Core Key Element Extension (http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-keyelement). E.g. what you have to deal with if you get resources conforming to one of them

Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1QI-Core Key Element Flag: ONLY USED FOR QI-Core Profile StructureDefinitions
ele-1: All FHIR elements must have a @value or children
ext-1: Must have either extensions or value[x], not both
... extension 0..*ExtensionAdditional content defined by implementations
ele-1: All FHIR elements must have a @value or children
ext-1: Must have either extensions or value[x], not both
... url 1..1uriidentifies the meaning of the extension
... value[x] 1..1booleanValue of extension
ele-1: All FHIR elements must have a @value or children

doco Documentation for this format