As web sites become more complex, evolve beyond brochure-ware, and involve real programming and not just html tags, web developers are quickly finding out that web site development is not just web page design but that the principles of good software development/software engineering should be applied. This is one of the first wave of books to apply software engineering principles to web site consruction (internet, intranet, and extranet examples) in order to ensure web sites that are robust, secure and that they scale as an organization's needs grow. This book attempts to define a methodology to follow in building web site software by examining where traditional software engineering principles can be applied and where these do not apply and new methods have to be forged.