Due to limitations in time and other resources, not all aspects of multimodality and multimedia systems could be included in this taxonomy report. And, of course, it is also not possible to enumerate all these topics that had to be excluded. Nevertheless, we want to name some of them in order to clarify what you will find in the following sections (see the next section) and what you will look for in vain.
Excluded topics are, among others:
Although we will use most of these things, we are not going to develop anything like that.