Creating a Logical Model

Create a logical data model and choose the extensions to add.

1. Choose File > New Model.
2. In the New Model dialog, select Model types, and Logical Data Model.
3. Enter a model name.
4. Click the Select Extensions button to the right of the Extensions box.

   A dialog shows currently loaded extensions. Normally you apply extensions when you create the model. If not, you can extend it later.

5. Select RAP Messages, select whether to share or copy, and choose OK.

   Option	Description
   Share the extended model definitions	PowerDesigner always uses the contents of the .xem file. If the contents of the .xem file change, the model will see those changes. For example, if a future version of RAP includes a new version of the file, models that share it will see those changes immediately.
   Copy the extended model definitions	Copies the contents of the .xem file into the model. The model uses its local copy instead of the file on disk.

   With either approach, you can use other extensions besides the shipped RAP extensions by creating your own .xem file. (While you can do this by adding to the RAP .xem file, this is not recommended.)