Speaking in terms of graph properties, Petri Nets are directed graphs.

We suggest to represent Petri nets with upward drawings, i.e., drawings in which the edges tend to flow, as much as possible, in a common direction. Also, for Petri nets we suggest to represent edges with smoothed lines.

The following figure shows an example of a Petri net constructed with GDT.

GAPI tutorial on upward drawings and BLAG tutorial on upward drawings provide a comprehensive guide on how to use GDT to construct these widely used drawings.

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