The model contains one compartment called C. There are four species called S1, S2, S3 and S4 and two parameters called k1 and k2. The model contains one reaction defined as:

Reaction Rate
S1 → S2 k1 · S1 · C

Reaction S1 → S2 defines one local parameter k1 which has a scope local to the defining reaction and is different from the global parameter k1 used in the RateRule.

The model contains two rules:

Type Variable Formula
Rate S3 k1 · 0.5
Rate S4 −k2 · 0.5

The initial conditions are as follows:

Value Units
Initial amount of S1 1.5 mole
Initial amount of S2 2.0 mole
Initial amount of S3 1.5 mole
Initial amount of S4 4 mole
Value of parameter k1 0.75 second-1
Value of parameter k2 0.25 second-1
Value of local parameter k1 0.9 second-1
Volume of compartment C 1 litre

The species values are given as amounts of substance to make it easier to use the model in a discrete stochastic simulator, but (as per usual SBML principles) their symbols represent their values in concentration units where they appear in expressions.