I bring this up since there is a slight inconsistency. plaid is aliased to tartan but tartan_skirt is aliased to plaid_skirt. The wiki for plaid even calls it tartan-patterned. There is also plaid_scarf with no alias from tartan_scarf.
I don't really care which way this goes, but it seems like it should use either tartan or plaid in all cases.
Updated by Shinjidude