http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation|5.2.0

Defines the level of expectation associated with a given system capability. See the capabilitystatement-prohibited modifier extension to set expectations to *not* support a feature.
NameFlagsCardTypeDescription & Constraints
Extension
0..1SHALL | SHOULD | MAY |SHOULD-NOT
 
extension
?..0
 
url
?..?
 
value[x] *
1..? ConformanceExpectation (required)
 
 
valueCode *
1..?code ConformanceExpectation (required)