f:Extension value[x]: minimum cardinality of 'value[x]' is 1 Extension.extension All FHIR elements must have a @value or children Must have either extensions or value[x], not both f:Extension/f:value[x] 1 coding: minimum cardinality of 'coding' is 1 text: maximum cardinality of 'text' is 0 Extension.value[x] 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].extension 1 All FHIR elements must have a @value or children Must have either extensions or value[x], not both f:Extension/f:value[x]/f:coding 1 system: minimum cardinality of 'system' is 1 code: minimum cardinality of 'code' is 1 display: maximum cardinality of 'display' is 0 userSelected: maximum cardinality of 'userSelected' is 0 Extension.value[x].coding 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].coding.extension 1 All FHIR elements must have a @value or children Must have either extensions or value[x], not both Extension.value[x].coding.system 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].coding.version 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].coding.code 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].coding.display 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].coding.userSelected 1 All FHIR elements must have a @value or children (inherited) Extension.value[x].text 1 All FHIR elements must have a @value or children (inherited)