f:Extension extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Year': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Absent-Reason': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Month': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Absent-Reason': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Day': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/vrdr/StructureDefinition/Date-Absent-Reason': maximum cardinality of 'extension' is 1 value[x]: maximum cardinality of 'value[x]' is 0 Extension All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) Extension.extension All FHIR elements must have a @value or children Must have either extensions or value[x], not both All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) All FHIR elements must have a @value or children (inherited) Must have either extensions or value[x], not both (inherited) Extension.value[x] 1 All FHIR elements must have a @value or children (inherited)