Comparing Models

You can compare the content of two PowerDesigner models or two resource files of the same type at any time. You may want to compare models or resource files to review evolutions in models or resources manipulated by different development teams or to evaluate the differences that exist between the models or resources before merging them.

1. Select Tools > Compare Models to open the Select Models to Compare dialog box.

   The current model is displayed in the Model 2 field.

2. Select a model to compare in the Model 1 list. Only models of the same type in the workspace are available for comparison.
   
   
   
3. [optional] Click the Options button to open the Comparison Options window and specify which objects and properties you want to include in the comparison (see Excluding Objects and Properties from a Compare or Merge).
4. Click OK to open the Compare Models window, which displays the objects contained within the models or resource files in a tree format, and highlights the differences between them (see Reviewing Differences when Comparing Models). You can apply a filter to simplify the list of differences (see Filtering Objects and Changes During a Compare or Merge).

• Reviewing Differences when Comparing Models
  The Compare Models window displays the models to compare as two trees of objects in left and right panes (with the model from which you launch the comparison on the right), and a third pane at the bottom with three columns, listing each of the properties of the selected object, and the values assigned to these properties in the two models.