Dear reader, 

The package PPCHTEX can be used to typeset chemical
formulas. This is the second edition. The package is a
separate module to CONTEXT, but can be used stand alone.

CONTEXT is a full featured, parameter driven macro package,
which fully supports advanced interactive documents.
CONTEXT offers most functionality found in other packages
and a bit more in an integrated way. After five years of
development and heavy use of CONTEXT in both the production
of complicated paper and electronic documents, we've
decided to put the package in the public domain. 

The complete documented source to CONTEXT will be available
later this year. The dutch version (i.e. dutch interface)
is in the public domain already. The english version (i.e.
english commands, keywords, messages) will come available
together with the documentation. Other interfaces can be
defined at will. A system generated cross refence guide is
already available and we are in the process of translating
the 450 page dutch manual to CONTEXT, so be patient. 

The next version of PPCHTEX will be english by default and 
fall back on some general CONTEXT modules. This will improve
both performance and convenience. Newer versions will be 
support more complex structures but will be upward compatible. 

It would be nice if we could build a library of chemical 
structures to accompany PPCHTEX. Users are invited to send 
us samples. Don't hesitate to react when things don't work 
as expected. We take suggestions serious. 

Hans Hagen
pragma@pi.net 

PRAGMA
Postbox 125 
8000AC Zwolle 
The Netherlands