11 th International Conference on User Modeling – UM 2007 Corfu, Greece June 25th – 29th, 2007 Workshop day: June 26th, 2007 TUMAS-A Workshop Proceedings Available on line: http://adenu.ia.uned.es/workshops/um07/tumasa07/proceedings.htm Edited by: Jesús G. Boticario Olga C. Santos May 2007