Should "DaysOfWeek.MONDAY" in rule example be changed to "DaysOfWeek.MON" to match enum definition?

https://docs.drools.org/latest/drools-docs/drools/language-reference/index.html#con-drl-declarations-enumerative_drl-rules

has this example

"

declare enum DaysOfWeek
   SUN("Sunday"),MON("Monday"),TUE("Tuesday"),WED("Wednesday"),THU("Thursday"),FRI("Friday"),SAT("Saturday");

   fullName : String
end

rule "Using a declared Enum"
  when
    $emp : /employees[ dayOff == DaysOfWeek.MONDAY ]
  then
    ...
end

"