A literal expression can be one of the following:
- An integer represents a natural number and is made of a sequence of digits, for example 12.
- A real represents a fixed point decimal number and is made of an integer and a fractional part. The parts are made of digits and are separated by a dot, for example 3.14159265.
- A string represents a sequence of characters, surrounded by quotes. Strings must be UTF-8 valid. A string example may be "Antidot Finder Suite".
- A boolean is either true or false.
- A date is in the ICU format, for example 2010-12-31.