This will be the frontpage, where you will find a series of tutorials about developing a Petri-Net editor using Eclipse GMF. Everything will be done by using the latest version of Eclipse, so I will start with the current Kepler release and go on with Eclipse 4.x - the aim will be to develop in combination with eclipse e4, but at first lets start with the well known GMF Tools.

Install Eclipse Modeling
First Steps - Creating the Model / using Ecore
First Steps - Creating the graphical representationl / using GmfGraph
First Steps - Creating the mapping model and the maaping between all created models before/ using GmfMapping
Add OCL constraints - Extend your mapping model by constraints defined through OCL (Object Constraint Language)

Fork or contribute at GitHub through https://github.com/alexejsailer/pipenets (Sourcecode)