XPL guidance?

[Eric Van Tassel 101233.342@xxxxxxxx]

On 20-5-98 RvR wrote (in part)

> I'll look up "if error" in the manual ...

But I don't think Rene will find what he needs in the XyWin or Xy4 DOS
manuals -- which raises a question.
I learned what little I know about XyWrite user programming -- including
≪if≪er≫ ≫, which I could hardly function without -- either from Herb
Tyson's "XyWrite Revealed" or from the 1989 XPL User's Guide, both of which
are built on Xy III.
I'm sure I've asked this before: is there *any* guidance, preferably in
book form (for those of us who are Webularly challenged), to XPL procedures
for Xy4 or XyWin?

Cheers
Eric Van Tassel