description: null package_name: uk.nhsdigital.medicines.r4 derivation: constraint name: Extension NHS BSA prescriptionType type: Extension elements: url: pattern: {type: Uri, value: 'https://fhir.nhs.uk/StructureDefinition/Extension-DM-PrescriptionType'} index: 0 value: choices: [valueCoding] index: 2 valueCoding: {type: Coding, choiceOf: value, index: 3} value[x]: elements: system: {index: 4} code: {index: 5} required: [system, code] package_version: 2.1.8-alpha class: extension kind: complex-type url: https://fhir.nhs.uk/StructureDefinition/Extension-DM-PrescriptionType base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [valueCoding, value]