The cardinalty of EventInfo shold not be 1..1. For a particular instance of an EventInfo there can be a sequence of EventInfo values between the Start and End time of an event. For example an EventInfo type of LOAD_AMOUNT may take on a scheduled sequence of values between the start and end time of the event. Furthermore the OpernADR 1.0 spec supports multiple EventInfo types defined for a single EiEvent instance so that there would be a sequence of values associated with each type.