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

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

Reaction S2 → S3 defines one local parameter k.

Note that the id of the local parameter k shadows the global parameter k. Within the defining reaction, the value of the locally-defined parameter k must be used.

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 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.