A class is a set of specific element generations.  It can be used
 to define a system version (such as a base level) consisting of
 different generations of several elements.  An element generation
 can belong to zero, one, or several classes, but a class may contain
 no more than one generation of a given element.

 A class name is any string of 39 or fewer characters, consisting of
 letters, digits, underlines, hyphens, dollar signs, and periods.

      (1)  HELP CMS CREATE CLASS tells how to establish one or
           more new classes.

      (2)  HELP CMS DELETE CLASS tells how to delete one or more
           classes.

      (3)  HELP CMS INSERT GENERATION tells how to insert one or
           more element generations into one or more classes.

      (4)  HELP CMS MODIFY CLASS tells how to change the
           attributes of one more classes.

      (5)  HELP CMS REMOVE GENERATION tells how to remove one or
           more generations from one or more classes.

      (6)  HELP CMS SHOW CLASS tells how to display information
           about one or more classes.