Roy T. Fielding Department of Information and Computer Science University of California Irvine, CA 92717-3425, USA Fax: +1 (714) 824-4056 EMail: fielding@ics.uci.edu Jim Gettys MIT Laboratory for Computer Science 545 Technology Square Cambridge, MA 02139, USA Fax: +1 (617) 258 8682 EMail: jg@w3.org Jeffrey C. Mogul Western Research Laboratory Digital Equipment Corporation 250 University Avenue Palo Alto, California, 94305, USA EMail: mogul@wrl.dec.com Henrik Frystyk Nielsen W3 Consortium MIT Laboratory for Computer Science 545 Technology Square Cambridge, MA 02139, USA Fax: +1 (617) 258 8682 EMail: frystyk@w3.org Tim Berners-Lee Director, W3 Consortium MIT Laboratory for Computer Science 545 Technology Square Cambridge, MA 02139, USA Fax: +1 (617) 258 8682 EMail: timbl@w3.org