The UML 2004 Doctoral Symposium was the first Doctoral Symposium in the UML Conference series. The Doctoral Symposium sought to bring together PhD Students working in areas related to UML and modeling in general. It was a full-day workshop held in parallel with the remaining workshops of the conference. Ten students were selected and were given the opportunity to present and discuss their research goals, receiving high-quality feedback from the rest of participants of the workshop, including a number of volunteer seniors that helped making the Symposium a success. The Doctoral Symposium will also be present in the next edition of the conference.