The logical expressions is an expression that evaluates as TRUE or FALSE. This expression can use some operators:

• Equals (=);
• Different (<>);
• More than (>);
• More or equal (>=);
• Lesser (<);
• and lesser or equals (<=).

For example:

• @(Contact.age> 18)

Notice that when you compare the text values, equals (=) and different (<>), the operators don’t differ Upper and Lower case.