W3C Member Submission 11 April 2005 This version: http://www.w3.org/submissions/2005/SUBM-xpl-20050411/ Latest version: http://www.w3.org/submissions/xpl/ Authors: Erik Bruchez, Orbeon, Inc. <ebruchez@orbeon.com> Alessandro Vernet, Orbeon, Inc. <avernet@orbeon.com> Copyright © 2005 Orbeon, Inc. This document is available under the W3C Document License. See the W3C Intellectual Rights Notices and D