18. The method according to claim 17 , wherein a plurality of the data field definitions of the data component is shared between the at least one message component and the at least one data component as represented by the mapping.
18. The method according to claim 17 , wherein a plurality of the data field definitions of the data component is shared between the at least one message component and the at least one data component as represented by the mapping. 30. The method according to claim 18 , wherein the unique identifier is a composite key.