The National Science, Mathematics, Engineering, and Technology Education Digital Library (NSDL) is the National Science Foundation's (NSF) ongoingeffort to build a comprehensive science digital library. This resource authored by David Fulker and Greg Janée (published in January 2002 arXiv Report) outlines the technical architecture for NSDL and defines the "technical scope and a functional model." This is required reading for anyone interested in the future of digital libraries and cooperative efforts to harness the educational power of the Web. Note: For information on the Internet Scout Project's involvement in NSDL, see http://scout.cs.wisc.edu/nsdl-reports/.