This document describes the user interface of the offline data analysis package. The motivation behind developing this user interface system is to have a simple, uniform interface for all the programs that we will write.
All applications using this system, when started, will start an interactive shell which will present the list of keywords to which the application is sensitive. The user can then set/reset the values of these keywords before starting the application. The initial values of any of these keywords can also be supplied as command-line arguments in the format <KeyWord>=[<Val0>[,<Val1>[...]]], or loaded from a file by a single command.
Numeric values of any of the keywords can be any algebraic expression.