Countable quantities.
Used for countable types such as pregnancies and steps (taken by a physiotherapy
patient), number of cigarettes smoked in a day.
Not to be used for amounts of physical entities (which all have units)

Declaration :

• C++ : class DV_COUNT : public DV_AMOUNT
• Java : package class DV_COUNT extends DV_AMOUNT

Artifact : DV_COUNT

All public operations : is_normal , is_simple , is_strictly_comparable_to , operator+ , operator- , operator< , operator= , valid_magnitude_status , valid_percentage