Jeni Tennison is an independent consultant specialising in XSLT andXML Schema development. She trained as a knowledge engineer, gaining aPhD in collaborative ontology development, and since becoming anconsultant has worked on using XML in a wide variety of areas,including publishing, water monitoring and financial services. She isthe author of "XSLT & XPath On The Edge" (Hungry Minds, 2001) and"Beginning XSLT" (Wrox, 2002), one of the founders of the EXSLTinitiative to standardise extensions to XSLT and XPath, and hasrecently become an invited expert on the W3C XSL Working Group. Shespends much of her spare time answering people's queries on XSL-Listand xmlschema-dev mailing lists.