With the increase of multimedia contents in the WWW, multimodal presentation using interactive life-like agents is attractive and becoming important. However, it is not easy for many people to write such multimodal presentations, due to the complexity of describing various behaviors of character agent and their interaction of particular character system with individual ( often low-level ) description language. In order to overcome this complexity and to allow more people to write attractive multimodal presentation easily, MPML ( Multimodal Presentation Markup Language)