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# Using TopLink Workbench

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To specify a reference descriptor for a relational mapping, use this procedure.

1. Select the mapped attribute in the Navigator. Its properties appear in the Editor.

2. Click the General tab. The General tab appears.

Use the Reference Descriptor field to select the descriptor referenced by this relationship mapping.

Note: For aggregate mappings the Reference Descriptor must be an aggregate. See "Configuring a Relational Descriptor as a Class or Aggregate Type" for more information. For variable one-to-one mappings, the Reference Descriptor must be an interface. See Configuring a Relational Variable One-to-One Mapping for more information.

You can specify a reference descriptor that is not in the current TopLink Workbench project. For example, to create a mapping to an `Employee` class that does not exist in the current project, do the following:

1. Add the `Employee` class to your current project. See "Working With Projects".

2. Create the relationship mapping to the `Employee` descriptor.

3. Deactivate the `Employee` descriptor. See "Active and Inactive Descriptors".

When you generate the deployment XML for your project, the mapping to the `Employee` class will be included, but not the `Employee` class.

See Also

  Configuring Reference Descriptor