A rule where you can remove articles that start band names.
For instance, in order to easily find a band I'd prefer to be able to go to: R for "Ramones" rather than T for "The Ramones" etc.
So this is where the canonical name for an artist is prefixed by "The", but you don't want it because it makes searching using your music player harder?
Note the canonical name for Ramones _is_ actually "Ramones", without the "The". In this case you could use the tag accuracy rules to get the current artist name without the "The".
Note that fields like ARTISTSORT can be used to make sure any artist starting with the definite article appears in lists as if "The" wasn't there, e.g. The Beatles would appear under "B".