  Multimodality can make (especially mobile) device interaction more efficient.
Sensors and communication capabilities of modern smartphones and tablets lay
the technical basis for its implementation. Still, mobile platforms do not make
multimodal interaction support trivial. Building multimodal applications
requires various APIs with different paradigms, high-level interpretation of
contextual data, and a method for fusing individual inputs and outputs. To
reduce this effort, we created a framework that simplifies and accelerates the
creation of multimodal applications for prototyping and research. It provides
an abstraction of information representations in different modalities, unifies
access to implicit and explicit information, and wires together the logic
behind context-sensitive modality switches. In the paper, we present the
structure and features of our framework, and validate it by four implemented
demonstrations of different complexity.
