{description: This is a concrete subtype of Element that has extensions (though the format in JSON is different), package_name: hl7.fhir.uv.tools.r5, derivation: specialization, name: CDSHooksExtensions, type: 'http://hl7.org/fhir/tools/StructureDefinition/CDSHooksExtensions', package_version: 0.4.0, class: logical, kind: logical, url: 'http://hl7.org/fhir/tools/StructureDefinition/CDSHooksExtensions', base: 'http://hl7.org/fhir/StructureDefinition/Element', version: 0.4.0}