http://hl7.org/fhir/StructureDefinition/regex|4.0.1
A regular expression that defines the syntax for the data element to be considered valid.
description: A regular expression that defines the syntax for the data element to be considered valid. derivation: constraint name: regex type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/regex'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/regex base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [value]