The model contains one compartment called C. There are four species called X0, X1, T and S1 and two parameters called k1 and k2. The model contains two reactions defined as:

Reaction Rate
X0 → T C · k1 · X0
T → X1 C · k2 · T

The model contains one rule:

Type Variable Formula
Algebraic n/a X0 + X1 + T − S1

The model contains one event that assigns value to species X1 defined as:

Trigger Delay Assignments
Event1 X1 > 2 4.3 X1 = 1

The model contains one initialAssignment:

Variable Formula
X0 X1 − 0.25

Note: SBML's InitialAssignment construct override any declared initial values. In this model, the initial value for the species X0 has not been explicitly declared and must be calculated using the InitialAssignment.

The initial conditions are as follows:

Value Units
Initial amount of X0 undeclared mole
Initial amount of X1 1.5 mole
Initial amount of T 1 mole
Initial amount of S1 3.75 mole
Value of parameter k1 0.1 second-1
Value of parameter k2 0.2 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.