description: This cross-version extension represents BackboneType from http://hl7.org/fhir/StructureDefinition/BackboneType|5.0.0 for use in FHIR R4.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: Ext_R5_BackboneType
type: Extension
elements:
  url:
    base: {max: '1', min: 1, path: Extension.url}
    pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-BackboneType'}
    index: 0
package_version: r5.r4-0.0.1-snapshot-2
class: extension
kind: complex-type
url: http://hl7.org/fhir/5.0/StructureDefinition/extension-BackboneType
base: http://hl7.org/fhir/StructureDefinition/Extension|4.0.1
version: 0.0.1-snapshot-2
required: [url]