Classes of Users of database query systems V Familiar with the database and its software IV Familiar with the database and the interaction language Ill Familiar with the contents of database II Familiar with the domain of application I Passing knowledge of the domain of application Of course, as users gain experience with a system, they will continually attempt to adapt to its quirks. If the purpose of the evaluation is to demonstrate that the natural language understanding system is merely useable, adaptation resents no problem. .
