description: A syntax intended for display to the user to guide their input (i.e. a human readable version of a regular expression). For example \"nnn-nnn-nnn\". package_name: hl7.fhir.core derivation: constraint name: User prompt for format type: null elements: extension: {name: extension, index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/entryFormat'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: 1.4.0 extensions: {} class: datatype kind: datatype url: http://hl7.org/fhir/StructureDefinition/entryFormat base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [valueString, value]