Some Useful Categories
From Clavis Canonum
(This page lacks the necessary links. Sorry for any inconvenience.)
Collections
Collections by date of origin
Collections by place of origin
Collections by size
Groups of Collections
Burchard, Burchard versions, and Burchard derivatives
The collection of Anselm of Lucca (all versions, plus very similar collections)
The Ivonian collections
Manuscripts
Collections by date of origin
Collections by place of origin
Digitized Manuscripts
https://beta.mgh.de/databases/clavis/wiki/index.php/Category:Digitized_Manuscripts