DA_UNIT_SYSTEMS modifies the type of measurement systems used in a session.
-->(DA_UNIT_SYSTEMS)--------------+ | +---------------------------------+ | +--------+-----(:DA_SYSTEM)-----+------------------------+---+--> | | | | | +--(:SI_METRIC)----------+ | | | | | | +--(:METRIC1)------------+ | | | | | | +--(:METRIC2)------------+ | | | | | | +--(:US_CUSTOMARY1)------+ | | | | | | +--(:US_CUSTOMARY2)------+ | | | | | | +--(:USER_DEFINED)-------+ | | | | | | +--(:ALL_DERIVED)--------+ | | | +-----------<---------<----------<-----------<------+
:DA_SYSTEM
- enables selection of the units of measure for the session.
:SI_METRIC
- selects the standard international metric system.
:METRIC1
- selects a metric system using centimeters, grams, and seconds as basic session units.
:METRIC2
- selects a metric system using millimeters, kilograms, and seconds as basic session units.
:US_CUSTOMARY1
- selects American units of measure using feet, pounds, and seconds as basic session units.
:US_CUSTOMARY2
- selects American units of measure using inches, pounds, and seconds as basic session units.
:USER_DEFINED
- specifies a customized system of units of measure.
:ALL_DERIVED
- specifies the units of measure will be derived from the
fundamental units already set in the active session.