Most of the functions in the Function Library operate on a data value of one of the UNICOM Intelligence Data Model data types of Boolean, Long, Double, Text, Categorical, Date, or Object. When more than one type of value is allowed, the parameter is declared as type None, and an error occurs if the value supplied is of an inappropriate type.

Value parameters to functions may be literal values (such as, 7.5, "Yes" or {1,6,7}), expressions of the appropriate type, or the names of variables. When a variable name is given in a function call in which a value is expected, the current value of the variable is used.