Chapter 9 Working with Object-Oriented Models
If your OOM and PDM are already designed, you cannot use the intermodel generation to create automatic mapping between OOM and PDM objects. You then have to define object links manually. The process is time consuming but it provides great flexibility for customizing the mapping between objects and guarantee a correct storage of objects in a relational database.
For more information on user-defined O/R mapping, see section Understanding O/R mapping.
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