After exhausting all the other places that the system looks for how to expand something, it tries to use the name of the item that you are trying to expand. For example, if you try to expand on a title, but the system can't figure out how to do this, the last GPD name it will try will be `title'. Since there is no such GPD, you'll get an error saying ``Couldn't create view using `title'. No such GPD.'
If you know how you want to expand this item, you can set it so that that GPD will be used in expansion by following the procedure in section 3.1. If you want to expand it just once, you can follow the procedure found in section 2.26.