Defines const variables could be used in Java.
Defines const variables could be used in Java. Use Object.XXX() instead of Object.xxx$.MODULE$
Values of continuous fields can be used with arithmetic operators.
Tests whether this optype is categorical (nominal or ordinal).
Tests whether this optype is regression (continuous).
Nominal field values can only be tested for equality.
Ordinal field values in addition have an order defined.
Not above three types.