With all the new advances in library technology--including metadata, social networking, and Web 2.0, along with the advent of nonlibrary and for-profit digital information companies like Wikisource and Google Print--librarians have barely had time to reflect on the nontechnical implications of these innovations. They need to take a step back and…

Discusses how collections in the digital library, instead of traditional cataloging, call for metadata, structured information about information. Describes three categories of metadata information about digital resources: descriptive, structural, and administrative. Examines emerging standards for digital-library classification. (AEF)