CloudFormation > Enums > ChangeSource ChangeSource¶ Enum Class¶ ChangeSource ¶ Bases: UnknownEnumMixin, StrEnum Attributes¶ AUTOMATIC class-attribute instance-attribute ¶ AUTOMATIC = 'Automatic' DIRECT_MODIFICATION class-attribute instance-attribute ¶ DIRECT_MODIFICATION = 'DirectModification' NO_MODIFICATION class-attribute instance-attribute ¶ NO_MODIFICATION = 'NoModification' PARAMETER_REFERENCE class-attribute instance-attribute ¶ PARAMETER_REFERENCE = 'ParameterReference' RESOURCE_ATTRIBUTE class-attribute instance-attribute ¶ RESOURCE_ATTRIBUTE = 'ResourceAttribute' RESOURCE_REFERENCE class-attribute instance-attribute ¶ RESOURCE_REFERENCE = 'ResourceReference'