Ethan V. Munson and Mark Pfeiffer
This paper describes the TDO model of media, which describes media as they are viewing by multimedia authors and the authoring software they use. This model is the basis of the MSPEC medium specification language, which is used to configure a style sheet system for multimedia authoring systems. The TDO model is compared to two other models drawn from multimedia and intelligent systems research and the possibility of creating a general model of media is discussed. An appendix describes recent extensions to the TDO model.