The problem with the terms LESS_THAN etc, is that it implies some kind of Range involvement, which is not what this is. To be more precise the terms should be JUST_LESS_THAN and JUST_GREATER_THAN since it defines the point that is infinitely close to the exact value, but not exact. I chose the terms BELOW, EXACT, and ABOVE since those terms are shorter and are less loaded with common Range based implication.