The model contains one compartment called "compartment". There are three species named S1, S2 and S3. The model contains two reactions defined as:

Reaction Rate
S1 → S2 k · S1 · compartment,
S2 → S3 k · S2 · compartment,

Reaction S1 → S2 defines one local parameter k. Reaction S2 → S3 also defines one (different) local parameter k. Both of these parameters have a scope local to the defining reaction.

The initial conditions are as follows:

Value Units
Initial amount of S1 3.0 × 10−4 mole
Initial amount of S2 0 mole
Initial amount of S3 0 mole
Value of local parameter k 1 second-1
Value of local parameter k 2 second-1
Volume of compartment "compartment" 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.