2 except for the labels. Labels are named after their meaning. In this paper we use the same idea for an XML interchange format proposal for high-level Petri nets. The ideas presented in this paper are illustrated by means of examples. . . It is quite another matter when it comes to the graphical layout of nets.
Different tools have dierent graphical attributes that can be associated with the net elements.
To be able to interchange models between different tools, we would like a minimal format containing only the information found in the standard for highlevel nets, and a more format for describing graphical attributes. The latter should be extendable to include tool-specific graphical information. . . In this paper we suggest how to separate presentation and content for a high-level Petri net interchange format. We used CSS examples to illustrate the main benefits of such a design technique. However CSS is more suitable for presentation of text rather than vector graphics such as Petri nets.