In light of the Google metadata controversy, Mark Pesce's post from last year is worth reading:
The central task of the librarian – if I can be so bold as to state something categorically – is to bring order to chaos. The librarian takes a raw pile of information and makes it useful. How that happens differs from situation to situation, but all of it falls under the rubric of library science. At its most visible, the book cataloging systems used in all libraries represents the librarian’s best efforts to keep an overwhelming amount of information well-managed and well-ordered. A good cataloging system makes a library easy to use, whatever its size, however many volumes are available through its stacks.
It’s interesting to note that books.google.com uses Google’s text search-based interface. Based on my own investigations, you can’t type in a Library of Congress catalog number and get a list of books under that subject area. Google seems to have abandoned – or ignored – library science in its own book project. I can’t tell you why this is, I can only tell you that it looks very foolish and naïve. It may be that Google’s army of PhDs do not include many library scientists. Otherwise why would you have made such a beginner’s mistake? It smells of an amateur effort from a firm which is not known for amateurism.
It’s here that we can see the shape of the future, both in the immediate and longer term. People believe that because we’ve done with the library, we’re done with library science. They could not be more wrong. In fact, because the library is universal, library science now needs to be a universal skill set, more broadly taught than at any time previous to this. We have become a data-centric culture, and are presently drowning in data. It’s difficult enough for us to keep our collections of music and movies well organized; how can we propose to deal with collections that are a hundred thousand times larger?