The BOM is the object model for business rules. You edit
BOM members in the BOM editor.
Introducing the Business Object Model (BOM)
The BOM is the basis for the vocabulary used in business
rules. It is an object model similar to a Java™ object model, and contains elements that
map to those of the XOM.
Collections
In the BOM, arrays and collections represent a set of objects.
In the BAL, you must set a collection domain on a collection of type java.util.Collection.