2. The GUI evaluation system according to claim 1 , wherein when an expression element specified as the expression element on an input restriction exists on the respective evaluation target screens, the data input expression determining section determines whether a common expression element on the input restriction exists.
1. A GUI evaluation system for evaluating a restriction expression on data input into an input component on an evaluation target screen included in the evaluation system, comprising: an expression information extracting section for extracting an expression element on a plurality of evaluation target screens based on information capable of specifying a restriction on input into an input component; a data input expression specifying section for comparing respective expression elements extracted by the expression information extracting section among input components different in restriction on input to specify an expression element indicative of the restriction on input; and a data input expression determining section for determining that a restriction expression indicative of an input restriction is consistent when, among expression elements specified by the data input expression specifying section, there is a common expression element on the same input restriction on the plurality of evaluation target screens, or that a restriction expression indicative of an input restriction is inconsistent when there is no common expression element.