Creating a Logical Data Model

Create a logical data model and add extensions to it.

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. You can apply extensions when you create the model or later.

5. Select ESPSchema, 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 sees those changes. For example, if a future version of ESP Schema includes a new version of the file, models that share it sees 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 ESP Schema extensions by creating your own .xem file. Although it is possible to do this by adding to the ESPSchema.xem file, Sybase does not recommended this.