The book provides an in-depth examination of the core concepts and general principles of web application development, using examples from specific technologies. This conceptual knowledge is critical when designing, developing and debugging complex systems, and makes it easier to learn the new application programming interfaces APIs that arise in the rapidly changing Internet environment. pThe companion web site for the book is located at www.webappbuilders.com.p pThe text is organized into the following sections p ul liCore Internet protocolsli liThe HTTP protocol as a foundation for web applicationsli liDiscussion of markup languages such as HTML, CSS, and XMLli liServer and browser architectureli liApplication design case studies using JavaEEStruts and Ruby on Railsli liSurvey of emerging technologiesli ul pThe second edition of the book has been updated with enhanced coverage of p ul liXML applications including XSLT, XSL-FO, and XPathli liXML-compliant HTML including XHTML and XHTM