17. The one or more non-transitory computer-readable storage media of claim 16 , wherein the range of values within the field having been are separated into discrete range segments and stored in the list of discrete values.
17. The one or more non-transitory computer-readable storage media of claim 16 , wherein the range of values within the field having been are separated into discrete range segments and stored in the list of discrete values. 19. The one or more non-transitory computer-readable storage media of claim 17 , wherein the list is recalculated after a threshold of changes have been made to the field.