http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Notes ... prepared in November 1983 for a couple of seminars at the University of Uppsala. These notes were made into a more complete form during a series of lectures at the University of Umea in the fall of 1985 and at Universite Paul Sabatier, Toulouse in December 1986"--P. ix