description: Provides the specific code for a FHIR element that has a required binding to a FHIR ValueSet\nor for a primitive type element without a binding. package_name: il.laniado.fhir.r4 derivation: constraint name: CodeSpecification type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://fhir.laniado.org.il/StructureDefinition/code-specification'} index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 0.2.1 extensions: {} class: extension kind: complex-type url: http://fhir.laniado.org.il/StructureDefinition/code-specification base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [value, valueCodeableConcept]