It took some time, but now you can find the official “BPMN 2.0 by Example”-Document on BPMN.org. The direct link is

http://www.omg.org/cgi-bin/doc?dtc/10-06-02

Besides our example concerning the incident management process that I have already blogged about, it contains a small introduction into the basic principles of working with BPMN (Chapter 5: Small examples introducing core concepts).

On top of that there are quite interesting examples about the serialization of BPMN-diagrams and the according diagram interchange between BPMN modelers, and more complex diagrams are demonstrated, like the famous Email-voting example.

I consider the document rather useful for getting a first but profound impression of BPMN.