From the new issue of CLIR Issues:
If you ask people in research libraries to identify the most significant digital library challenge facing them, it is likely that most will respond with the same answer: the absence of standards. These people are not referring to the formal standards emerging from the International Standards Organization (ISO) or the World Wide Web Consortium (W3C). Such standards are plentiful. Instead, they are bemoaning the lack of a consensus about when and how to apply those formal standards in a digital library.