Important: This whitepaper applied to Internet Explorer 8 Beta 1, and has been removed. For current documentation, please visit the corresponding page in the Internet Explorer SDK:
Defining Document Compatibility Windows Internet Explorer 8 Beta 1 for Developers introduces the IE8 standards mode by default—this lets Web designers use the latest rendering features available in Internet Explorer 8 Beta 1 for Developers. In addition to layout changes, IE8 standards mode will also affect the behavior of scripted APIs (DOM).