I'm looking for information, if not remember wrong, so I mention that system was introduced by IBM in version 19 of SPSS.
I see it every day to manipulate SPSS at the university and find it very useful to prevent obvious errors by the user(using the GUI). -- Bastián Díaz _______________________________________________ pspp-dev mailing list pspp-dev@gnu.org https://lists.gnu.org/mailman/listinfo/pspp-dev
