A set definition file controls which problems are displayed to the students, the order in which the problems appear, and govern the dates during which students are allowed to work on a given set. The name of a set definition file must be of the form setNameOfSet.def which will result in a problem set called ``NameOfSet''. Typical names might be set2.def or setExam3.def. The typical core of a set definition file has the form: