1. Carl Lagoze and Herbert Van de Sompel, The Open Archives Initiative: Building a Low-Barrier Interoperability Framework (2001), http://www.openarchives.org/documents/oai.pdf (accessed May 19, 2003).
2. Stuart Weibel and J. Hakala, “DC-5: the Helsinki Metadata Workshop,” D-Lib Magazine (February 1998), http://www.dlib.org/dlib/february98/02weibel.html (accessed May 19, 2003).
3. Carl Lagoze, “Keeping Dublin Core Simple: Cross-Domain Discovery or Resource Description?” D-Lib Magazine (January 2001), http://www.dlib.org/dlib/january01/lagoze/01lagoze.html (accessed May 19, 2003).
4. Carl Lagoze, “The Warwick Framework: A Container Architecture for Diverse Sets of Metadata,” D-Lib Magazine (July/August 1996), http://www.dlib.org/dlib/july96/lagoze/07lagoze.html (accessed May 19, 2003).
5. Library of Congress, MODS: Uses and Features (2003), http://www.loc.gov/standards/mods/mods-overview.html (accessed May 19, 2003).