Part 1 XML in a wireless context: introduction to wireless applications; wireless networks and protocols; XML primer. Part 2 XML-related technologies: XHTML and XHTML Basic; VoiceXML and CallXML; GML; SOAP. Part 3 Wireless XML applications: building XHTML applications; making a Web site I-mode compatible; building a voice portal; building multimedia applications; using SVG and GML to represent the real world; database integration; transferring Web content to a handheld device; building Web interfaces for Telecom equipment. Part 4 The future of XML in wireless: proximity (NVML, SLoP, POIX); personalization (PIDL); messaging and precence applications (IMPP); databases (XML Query Language). Appendix: quick reference.