using ptx for permuted indices

[rbarrell]

     Does anyone have any good examples of using ptx to generate permuted
indices?  Unfortunately, TFM which is part of SCO's Text Processing System
gives no example of how input should be arranged for presentation to ptx.  In
particular, I would like to generate a permuted index which has the same format
as the one SCO has in their actual documentation.  
     TFM also mentions that each output line begins with .xx "where .xx is
assumed to be as nroff(CT) or troff(CT) macro provided by the user."  Perhaps
this is where I need assistance instead (or also).  Does this mean there should
already be a macro somewhere (whose name I'd have to substitute for .xx) to
handle what I want to do, or does that mean I'll have to figure out how to
write such a beast?
     Please respond by e-mail to avoid unnecessary clutter of the newgroups.  I
will post or mail a summary of responses if anyone else is interested.  Thanks.

-- 
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