We provide the pvbrowser GPL Edition with no warranty. 

This program is free software; you can redistribute it and/or modify it 
under the terms of the GNU General Public License as published by the 
Free Software Foundation; either version 2 of the License, 
or (at your option) any later version. 

- Qt, VTK, QWT, Tcl/Tk, OpenGL are licensed elsewhere. 
- rllib is now under LGPL. 

There is one exception to the above statement: 
If you don't want your ProcessViewServer become GPL software. E.g. you don't want to publish your ProcessViewServer as GPL Software with all your code. It is possible to order a commercial license. In this case your ProcessViewServer may stay closed source. In order to get a license contact  lehrig@t-online.de Commercial licenses are only available from the original autor of the program(s). 
Based on the "Quid Pro Quo" principle, if you wish to derive a commercial advantage by not releasing your application under an open source license, you must purchase a commercial license from  lehrig@t-online.de  . By purchasing a commercial license, you are no longer obliged to publish your source code. 
If you wish to use a pvbrowser GPL Edition, you must contribute all your source code to the open source community in accordance with the GPL license terms. 
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Commercial Software:

- allows you to build closed source software although using ui2pvc and server library.
- allows you to sell closed source software without your own sourcecode.
- you have to distribute our software as is to your customers.
- you have to pay a 1 time license. 
- if you payed the 1 time license you can use any subsequent version of pvbrowser.
- if you want to use any of the above modules (Qt, VTK, QWT ...), please contact these projects.

Lehrig Software Engineering, March 2006 mailto:lehrig@t-online.de
