This is it — the only XMLSPY reference book authorized by Altova, Inc. Written by a top XML "spy," it reveals all the secrets of this award-winning XML development environment, already used by more than 1 million registered users worldwide. Learn to create and validate documents, design XML Schemas and WSDL files, and build and debug XSLT stylesheets. Whether you're new to the Spy world or a veteran seeking faster, easier ways to build XML applications, this is the definitive handbook and the official textbook for XMLSPY training and certification.