View, Create, and Edit Business Object Relationships
Define business object relationships to more easily create pages with parent-child relationships or drop-down lists that reference another business object's values. These relationships can be one-to-one, many-to-one (and one-to-many), and many-to-many.
It's possible to create, edit, and delete relationships from the business object's Overview page as well as in the Diagrammer, both of which show all relationships of the current object. When a business object field references another object, you can also edit the specific relationship from the referenced field's Properties pane.
The Diagrammer helps you visualize business object relationships. To define a relationship when working with a business object diagram, see Create Relationships with the Diagrammer.