TASK PROTOCOL SPECIFICATION
Paul M. Mullins, Siegfried Treu · ACM SIGCHI Bulletin · 1991
Methods of specification for human-computer interfaces (HCI) are diverse. Commonly used methods include (augmented) transition networks, BNF grammars, event-based descriptions, and the command language grammar [Moran81]. The latter is especially useful for its task-based description of the conceptual model as well as the dialogue. The Command Language Grammar (CLG) begins with a task analysis, and proceeds to model the HCI structurally through a process of step-wise refinement. The result is a detailed specification or representation of the system.