In fact it includes 236 catalogues, so all of the numbers advertized are too low. But it is still incomplete. Inspection suggests that what's on now are mostly newer catalogues, so it's a great way to look at the resources in smaller German libraries with new catalogues one would not normally search. 3562 of the entrees we owe to Bernd Michael, the well known Buridan scholar from Berlin. There's a manual, but people don't enjoy it.
All commands appear to allow wildcards.
Michael gets information on all the manuscripts, for which his discription was the source of the record. Gets you a list of all the entries for Munich. Used at the front produces Peckham as well as Ockham. Used in the middle get Ockham, Ockam, Occam, octavam etc. Not sure about the subtleties.