Abstract

A tool has been built based on Moran's Command Language Grammar (CLG). It can take a user-interface design written in CLG and check its consistency and validity using syntactic and semantic rules. The reasons CLG was used for the design representation are discussed. There is a description of the formal syntax and semantics developed here by refinement of work by Moran and Sharratt. Implementation is briefly covered, followed by a short case-study based on the Apple Macintosh “Note Pad” utility. Strengths and weakness of CLG are discussed, and suggestions made for useful features in future design tools.