Deals without StartDate/StartDateTime (ERN-3 & ERN 4.1)
StartDateTime in the
Deal composite was optional in ERN-3, ERN 4.0 and ERN 4.1; from ERN 4.2 onwards it will be mandatory.
The reason for this change is that the semantics of having no
StartDateTime is ambiguous and DDEX strongly recommends to always communicate a StartDate or a
StartDateTime in every