This schema defines the element qualified by the 'http://jabber.org/protocol/xhtml-im' namespace. The only allowable child is a element qualified by the 'http://www.w3.org/1999/xhtml' namespace. Refer to the XHTML-IM schema driver for the definition of the XHTML 1.0 Integration Set. Full documentation of this Integration Set is contained in "XEP-0071: XHTML-IM", a specification published by the XMPP Standards Foundation. http://www.xmpp.org/extensions/xep-0071.html