documentation of interest

[Ben Pfaff]

Browsing through the SPSS documentation available on the web, I
discovered some manuals I hadn't looked at before.  A few are
interesting:

        * The GPL Reference Guide, where GPL is Graphics
          Production Language.  This describes a simple but
          powerful language for graphing.  I bet that we'll want
          to implement this at some point--it would make a nice
          backing for a GUI for graphs--although it would be a
          big project too.

        * The Tables reference guide.  This describes the GUI
          behind the CTABLES command syntax.  I've been wrestling
          with how to deal with table output for a while now
          (well, *years*), and this might be nice to look at
          while thinking about that.

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