Contents

This directory contains XPCE, an   object-oriented  symbolic programming
environment   for   User   Interfaces.   XPCE   was   designed   to   be
language-independant. In practice it has   gained popularity with Prolog
and many useful libraries are now   available for Prolog only. Therefore
we will often talk about XPCE/Prolog.


Authors

The development of XPCE was started by Anjo Anjewierden. The package was
then called PCE. He designed and implemented  version 1 and 2. Version 3
is  the  result  of  a  joint  effort  from  Anjo  Anjewierden  and  Jan
Wielemaker. This was the last version based  on SunView. Version 4 and 5
have been designed and implemented by Jan  Wielemaker. It makes the full
object oriented mechanisms  underlying  PCE   available  to  the  Prolog
programmer and has bindings for X-windows (X11) and MS-Windows (Win32).


Copyrights

The copyright to XPCE is owned by  the University of Amsterdam. The XPCE
kernel (the C sources) are  distributed   under  the  Lesser GNU General
Public License (LGPL). The XPCE/Prolog   libraries  are distibuted under
the normal GNU General Public License (GPL) with an additional statement
that allows using these files to   create  an executable program without
the requirement on the licence  conditions.  This   is  the  same as the
SWI-Prolog  copyright.  See  http://www.swi-prolog.org/license.html  for
details and discussion.


Installation

See the file INSTALL for installing  the binary version. See COMPILATION
for installing from the sources. Further information on building XPCE is
also available from the SWI-Prolog and XPCE web pages.


Bugs

Bugs should be reported to xpce-bugs@swi.psy.uva.nl. Please indicate the
XPCE version and Prolog/Lisp system  used   (if  not SWI-Prolog). If the
error can be isolated, it will generally  be   fixed,  so  it is in your
interrest to report the error in such a way that we can reproduce it.


Warranty

The authors, nor the Department or University PROVIDE ANY WARRANTY.  See
the license agreement for further details.