description: 'Source reference for Requirements - exactly one of the following must be provided:\n- url (url data type): URL to retrieve Requirements definition from input/ or external source\n- canonical (canonical data type): Canonical URI pointing to the Requirements definition\n- instance: Inline Requirements instance data' package_name: smart.who.int.base derivation: specialization name: RequirementsSource type: http://smart.who.int/base/StructureDefinition/RequirementsSource elements: url: {type: url, short: URL, index: 0} canonical: {type: canonical, short: Canonical, index: 1} instance: {type: 'http://smart.who.int/base/StructureDefinition/Requirements', short: Instance, index: 2} package_version: 1.0.0 class: logical kind: logical url: http://smart.who.int/base/StructureDefinition/RequirementsSource base: http://hl7.org/fhir/StructureDefinition/Base version: 1.0.0