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The recent standard for the real-time unified modeling language (RT-UML) addresses the specification of real-time requirements and time using extended UML diagrams. It has a great potential to impulse the use of object orientation and UML in the development of real-time applications. This work evaluates the suitability of the RT-UML profile for modeling distributed real-time systems. The paper includes both a theoretical assessment of the proposed modeling concepts as well as it includes a case study, which is used to highlight the benefits and drawbacks from the adopted specifications.