xiaoming, This is cool. just a couple of thoughts. > If a user is interested in "The Golden Fleece and the Heroes Who Lived > Before Achilles" with ISBN:0689868847, and he can limit the search to "OCA" > by issuing xISBN request with "library=oca", such as: > > http://xisbn.worldcat.org/webservices/xid/isbn/0689868847?library=oca&fl=* > > This query limits search scope to OCA, and the result returns an ISBN match > with its URL link to: http://www.archive.org/details/goldenfleecehero00colu > I think many libraries, both those currently involved in OCA and those outside the project, would be happy to see something like this made available. I have to admit it seems odd to me to include so much attribute information in a single <isbn> element, but I suppose that would be helpful in identifying what specific manifestation is being referred to in the URL? > Similarly, a user can request same ISBN with the library limiting to > "ebook", such as: > http://xisbn.worldcat.org/webservices/xid/isbn/0689868847?library=ebook&fl=* > > It returns both OCA match and a Netlibrary Audio book match. > In this scenario, is there a way to indicate free vs. licensed somewhere in the <isbn> entry? I'm assuming that the Netlibrary audio book is *not* free. We have very few mechanisms to do that within MARC records; it would be great to think about that here as most libraries will be interested in *free* links to digitized content available from anywhere (google book search, oca, etc.). Also, have you considered the response for multiple digitized sources for the same ISBN? -emily -- Emily Lynema Systems Librarian for Digital Projects Information Technology, NCSU Libraries 919-513-8031 [log in to unmask]