Extending UML for User Interface
http://www.uidesign.net/2000/papers/TUPISproposal.html

Anderson, David J.
UIdesign
2000

Abstract:

This paper seeks to set out my current position and opinion on how the Unified Modeling Language might be extended to accommodate the modeling of interaction design and user interface design for the purpose of facilitating a user centered design process. I will be presenting proposals for two distinct levels of abstraction in the development of a user interface design. For the higher level, the Interaction Design, I will seek to layout a laundry list of attributes that would be required by a good modeling language for Interaction Design.