Re: [gutvol-d] Catalog Subjects

I've been looking at enhancing my list of Google Books with a database of Google Books with their respective MARC entries from either the LOC or owning library, and I see that the catalog subject headings for different editions of books can be quite different. It's obvious that it's inconsistent, but better than nothing. While text string searching is important, book classification is also important, and this is one thing that Google and other PD archives are usually lacking because they generally don't try to preserve (correct, enhance) the MARC entries and support search by subject.