If you prefer, you can set Rational Rhapsody DiffMerge to only make matches by name only. Therefore the name of an element (for example, Class_A) in one unit must match the name of an element (Class_A) in the other unit before a match can be made. If you prefer to compare the elements in units with this method, you can specify this method in the ElementMatchRule preference. For more information about this preference, see General preferences category.
For examples of results of the two compare methods, see Examples of how Rational Rhapsody DiffMerge handles renamed elements.