2007-03-01T000000Z caeLifecycleTypevarious Controlled Vocabulary identifying the logical flow model for handling the corporate action or event. mandatory Holder MUST participate and there are no options. mandatoryOptions Holder MUST participate and there are some options - one of which may be a default. voluntary Holder may elect to participate if eligible but there are no options. voluntaryOptions Holder may elect to participate if eligible and there are some options. multistage A complex CA with multiple dependent sequential stages.