Interpretation of SPNs as Molecular Interactions

Place ==> Molecular Species

Transition ==> Reaction

Input Arc ==> Defines reagent of reaction

Output Arc ==> Defines product of reaction

Weight Function ==> Rate of reaction

Marking of SPN ==> State of reaction system

(number of molecules of each species)

Initial Marking ==> Initial State of system

Graphical definition of a simple reaction: A+B -> 2C

Interpretation of a transition being enabled:

enough of all the reagents must be present for the reaction to complete

Interpretation of a transition firing:

a single molecular reaction