Maintenance of Object Types (BOR) 
The maintenance of object types encompasses the functions of the Business Object Builder for creating, displaying and changing object types.
You need these functions if you want to:
Look at and analyze the definition and implementation of a particular object type
Create a new object type or change an existing object type
Change the release status of an object type
If required, you can get an overview of the existing object types including their relationships using the Business Object Repository Browser. The Business Object Repository Browser is called from the Business Object Builder.
You can use the object types supplied by SAP and extend their definitions if required. For more information, see Extending and Adapting Object Types.
You create a new object type with initially just its basic data. This assigns the appropriate position in the Business Object Repository to the object type.
You can then edit the object type components in detail.
You choose Tools to start the Business Object Builder.
To switch directly to the maintenance of an object type, you enter the ID of the object type in question and select
Display or
Change
For more information on creating a new object type, see Creating Object Types.
You select Business Object Repository to call the Business Object Repository Browser.