So, my new features look for “search inside” functionality in GBS, Amazon, and HathiTrust.
In GBS and HathiTrust, we can look up by OCLC number. This is ordinarily very useful, allowing us to catch ‘hits’ we wouldn’t have caught otherwise, for instance for books without an ISBN.
But here’s a case where… well, it almost works too well. Or to put it better, it doesn’t work well because of lack of sufficient metadata about what’s really going on.
My link resolver gets an article-level citation, for an article that’s in the journal Educational Studies. Somehow, Umlaut gets an OCLCnum for the journal too. Not sure if this was provided with the original citation (quite possible), or “enhanced” by Umlaut. But having the oclcnum is good, it allows us to look up print runs in our local catalog, for instance. That it’s title-level rather than article-level metadata just makes it analagous to the ISSN, which usually is present in an OpenURL.
But then we go to HathiTrust and GBS and we look up the OCLCnum: 1567620
And we find hits! Because University of Michigan has digitized one volume of that journal, and represented it on a record identified with that oclc number. Which identifies the entire journal.
So Umlaut decides that there is “search inside” functionality at HathiTrust, and provides the link. But Umlaut has no way to warn the user “it’s only search inside of a particular volume”–or even better (but completely impossible) see whether that particular volume includes the article-level citation at hand, to see if it’s useful for that particular citation at all. No way to do it. Our library metadata practices just aren’t good enough.
Umlaut also finds a hit at GBS (to another copy of the same digitized manifestation, that U of M digitized as part of their HathiTrust partnership). But, while it is searchable in GBS, the GBS API doesn’t advertise that fact (GBS for some reason chooses to not tell you about some things that really do have search-inside and/or limited previews), so Umlaut doesn’t provide a GBS search-inside link, just a “Book Information at” link. Yeah, it’s calling it a book when it really shouldn’t be–but GBS’s interface does too!