f:Extension id: minimum cardinality of 'id' is 1 valueQuantity: minimum cardinality of 'valueQuantity' is 1 Extension All FHIR elements must have a @value or children Must have either extensions or value[x], not both Extension.id All FHIR elements must have a @value or children Extension.extension All FHIR elements must have a @value or children Must have either extensions or value[x], not both Extension.url All FHIR elements must have a @value or children f:Extension/f:valueQuantity id: maximum cardinality of 'id' is 0 value: minimum cardinality of 'value' is 1 comparator: maximum cardinality of 'comparator' is 0 unit: maximum cardinality of 'unit' is 0 system: maximum cardinality of 'system' is 0 code: maximum cardinality of 'code' is 0 Extension.valueQuantity All FHIR elements must have a @value or children Extension.valueQuantity.id All FHIR elements must have a @value or children Extension.valueQuantity.extension All FHIR elements must have a @value or children Must have either extensions or value[x], not both Extension.valueQuantity.value All FHIR elements must have a @value or children Extension.valueQuantity.comparator All FHIR elements must have a @value or children Extension.valueQuantity.unit All FHIR elements must have a @value or children Extension.valueQuantity.system All FHIR elements must have a @value or children Extension.valueQuantity.code All FHIR elements must have a @value or children