Using Graphset to develop a ladder PLC program

Hello,
I am trying to find a good source to learn about Graphset. I am not sure if I am spelling this correctly. I have been told that it is a method of developing code for PLCs that is very well organized. I was told that it is extremely structured, and if very popular in Europe. If anyone can direct me to any information, I would appreciate it.


Thanks

Rob

If your French is good or you are willing to tranlate text goto:
http://www.lurpa.ens-cachan.fr/grafcet.html

Otherwise checkout the other post for GRAFCET:
http://www.plctalk.net/qanda/showthread.php?s=&threadid=48