Martin Ph. and Eklund P. (2002).
Manageable Approaches to the Semantic Web.
"Practice & Experience" alternate track of the WWW 2002, 11th International World Wide Web Conference, Honolulu, Hawaii, USA, May 7-11, 2002.
PDF version. Postscript version. HTML version.
A slightly extended and refined version of this article (33p) has been turned into a chapter for a book entitled "Web Intelligence".
PDF version. Postscript version.
Also see this complementary article about how knowledge can be represented in (or translated from/to) RDF/XML, KIF, Frame-CGs, Formalized English and CGIF.