Symbol (<>)

The <> operator is a comparison operator used to check whether two values are not equal. It returns a Boolean result (true or false) and is commonly used in OCL constraints and validation rules.

Assume the Department class has an attribute called DepartmentName.

Department.allInstances->forAll(d | d.DepartmentName <> 'Projects')

Results:

The expression returns true only if the Department class does not have a Projects record.