"MyLibrary is a Perl module that works against a specific database"
The bigger picture is a connection between, Resources, Patrons, & Librarians. If I could create an analogy I would say that it is a meta-refworks application but it extends past adding facets to resources. The idea goes to add the facets to the patons, & librarians. So materials can be deemed: "Linux Administration" & so can a patron that is interested in the topic and ultimately the Librarian.