Validation Rules
GroupReversal1Rule: If GroupHeader/GroupReversal is true, then TransactionInformation is not allowed.
If GroupHeader/GroupReversal is false, then at least one occurrence of TransactionInformation must be present.
GroupReversal2Rule: If GroupHeader/GroupReversal is true, then OriginalGroupInformation/ReversalReasonInformation/ReversalReason must present.
GroupReversal3Rule: If GroupHeader/GroupReversal is false, then NumberOfTransactions must equal the number of occurrences of TransactionInformation.