/ cat / type | IsBoolean | Returns if an expression is a Boolean value. |
| IsByte | Returns if an expression is a Byte value. |
| IsDate | Returns if an expression is a Date value. |
| IsFloat | Returns if an expression is a Float value. |
| IsInteger | Returns if an expression is an Integer value. |
| IsLong | Returns if an expression is a Long value. |
| IsNull | Returns if an expression is NULL. |
| IsNumber | Returns if an expression is a number. |
| IsObject | Returns if an expression is an Object value. |
| IsShort | Returns if an expression is a Short value. |
| IsSingle | Returns if an expression is a Single value. |
| IsString | Returns if an expression is a String value. |
| TypeOf | Returns the type of the value of an expression. |