Once you have imported the ready-made sample, you can inspect it
to become familiar with relationships and the editor in which they are managed.
In the previous task, you imported the following resources:
- Bank module. It has an export, an interface, several business objects
and many business object maps.
- Brokerage module. It has an export, an interface, several business objects
and many business object maps.
- eMerged library. It has many business objects, a Bank interface, and a
Brokerage interface.

The sample prebuilt sample shows a customer
relationship based on three roles. The key attribute in all three roles is
the customer ID number. That attribute is used to map the relationship in
business object maps.
A relationship establishes an association across
data from two or more data types. Each data type is represented as a role
in the relationship. Each role in a relationship is distinguished from other
roles based on the function that they serve in the given relationship. This
means that several roles ultimately contribute to build the relationship.
The data that you typically transform using relationships are ID numbers,
such as customer ID, Order ID, or product ID.
Restriction: Note
that relationships cannot be included in mediation modules.