1. Process Description Language
2. Activity Flow Language
Let us discuss each in turn.
According to the SBGN website, the "Process Description language shows the temporal courses of biochemical interactions in a network. It can be used to show all the molecular interactions taking place in a network of biochemical entities, with the same entity appearing multiple times in the same diagram".
|Reference Card for SBGN symbols|
The Activity Flow Language "depicts the flow of information between biochemical entities in a network. It omits information about the state transitions of entities and is particularly convenient for representing the effects of perturbations, whether genetic or environmental in nature".
An Activity Flow Description map is annotated below.