Chapter 12 Comparing and Merging Models

Selecting models to merge

When you start the merge process, the model to be merged by default is the model that contains the active diagram. You can modify this default model, but you have to choose among models of the same type.

Models to merge must be opened in the workspace to be included in the From list of the Select Models to Merge dialog box.

If you click the Options button, you can open the Comparison Options dialog box and define options before you start the merge process.

For more information on defining comparison options, see the "Defining comparison options" section.

To select models to merge:

1. Select Tools→Merge Models.
   
   The Select Models to Merge dialog box is displayed. The current model is displayed by default in the To box.
   
   
      DBMS and Language
   If you want to merge physical data models, you have to select two models with the same DBMS. If you want to merge object oriented models, you have to select two models with the same language.
   
   
2. Select a model from the From list.
   
3. Click OK.
   
   The Merge Models window is displayed.

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