You can import Rational Rose (.MDL) models created with version 98, 2000, and 2002 into an OOM.
A Rose model can support one or several languages whereas a PowerDesigner OOM can only have a single object language. When you import a multi-language Rose model into an OOM, the OOM will have only one of the object languages of the Rose model.
The following table shows how Rose languages are converted to PowerDesigner languages: