The second step in setting up the nested form link control is to link the control with the attribute defined in step one (See 7.1.2.6.1) in the Entity Design(See 7.1).
Drag and drop the Nested Form Link control onto the design canvas
To link the attributes, click on the “DataMember” in the properties panel and click the button 
to select the attribute.
By selecting the button , the “object selector” that contains the attributes defined in the entity is displayed.
