The
increasing availability of new types of interaction devices raises
the need for new methods and tools to support the design and development
of highly usable context-sensitive nomadic applications accessible
through multiple platforms.
This paper provides an overview and discusses a solution based
on the use of multiple levels of abstractions, which has been
studied within the framework of the European project CAMELEON.
Moreover it addresses the problem of evaluating the usability
of these tools by discussing the specific issues, the criteria
and methodologies applied as well as some results obtained in
an experimental activity on the subject.
