The model contains one compartment called "compartment". There are three species named S1, S2 and S3 and one parameter named k1. Compartment "compartment" is 0-dimensional. Species S3 is labeled as constant and therefore cannot be changed by rules or reactions. The model contains one reaction defined as:

Reaction Rate
S1 → S2 k1 · S1 · S3

The initial conditions are as follows:

Value Units
Initial amount of S1 1.5 mole
Initial amount of S2 0.5 mole
Initial amount of S3 1.2 mole
Value of parameter k1 1.78 mole-1 second-1

In this example the compartment has its spatialDimensions attribute set to zero; i.e., it represents a point and therefore cannot have size or units. The species values must be treated as amounts and not concentrations.