INFORMATION PROCESSING APPARATUS, METHOD OF OPERATING IT, AND COMPUTER READABLE INFORMATION RECORDING MEDIUM

A display part receives an input from a user and display a message to the user, a constraint processing part processes constraints among functions of a printer based on the input which the display part has received, and generates constraint information, and a message generating part manages a plurality of terms in a form of a term list, and combines terms of the plurality of terms to generate the message to be displayed by the display part based on the constraint information generated by the constraint processing part.