description: When present, this extension indicate that the event actually only occurs on the specified days of the month, on the times as otherwise specified by the timing schedule. package_name: hl7.fhir.r4.core derivation: constraint name: dayOfMonth type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/timing-dayOfMonth'} index: 1 value: choices: [valuePositiveInt] index: 3 valuePositiveInt: {type: positiveInt, choiceOf: value, index: 4} package_version: 4.0.1 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/timing-dayOfMonth base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [valuePositiveInt, value]