description: Direction (e.g., N, S, W, E). package_name: hl7.fhir.uv.extensions derivation: constraint name: ADXPDirection type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-direction'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: 5.2.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-direction base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [valueString, value]