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# Object type definitions

In the Administration Console, you can define, set up, and manage the types of Dimensions CM objects.

In this topic:

## About object type definitions

Use the Object Type Definitions section in the Administration Console to work with Dimensions CM object type definitions:

- View the object types for a particular object class (item, request, baseline, design part, or project) in the current product.

- Add a new object type for a particular object class.

- Delete an object type of a particular object class.

- Specify additional options for item types, request types, and project types.

- Assign an existing lifecycle to an object type.

- View and edit the associated lifecycle details for a specific object type. For details, see Edit lifecycle states.

- List, define or update attributes for a particular object type.

- Define item libraries for the current product and also for specific item types within the product.

- Define templates for items and requests.

- Specify valid change management relationships between request types and other request or item types for the current product.

- Add, edit, or delete item-to-item or request-to-request relationships across products in the base database.

- Add, edit or delete the attribute mappings used for the priming of requests for the current product or across products.

- Specify the change management rules for controlling the development of item or request types for the current product.

To open Object Type Definitions, go to Administration Console > Configuration Object Management > Object type definitions. For details, see Object Types main window.

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## Guidelines for managing object types

The following rules and guidelines apply to object type definitions:

- To work with object types, you need the Manage Object Types privilege.

- You cannot delete an object type (item types, request types, baseline types, design part categories, and project types) if any instances of that type existing within the product.

  Request types: You cannot delete requests located in both the main and secondary catalogs.

- An item type or request type cannot be deleted if its rules are still enabled.

- An object type is defined in relation to the currently selected product. To set up an object class of the same type in other products, define them separately in each product.

- When you create a product based on an existing product, the object type definitions are copied to the new product.

  You can also set up object types by selecting $GENERIC as your current product and then using the $GENERIC product as a template for object types when creating a new product.

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See also:

- Create and manage object types
- Assign attributes to object types
- Assign a lifecycle to object types

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