consists of two editions: A freeware edition and a commercial Pro edition. Prior to version 3, the suite also consisted of Microsoft Expression Media, a digital asset management application sold to Phase One. Features Until version 2, Expression Web was the only application in the Expression Studio suite based on Microsoft Office code and dependencies. With version 3, Expression Web was rewritten in Windows Presentation Foundation, in line with the rest of the Expression Suite, without Microsoft Office dependencies, essentially making it a new managed code program. A result of the complete rewrite was features like customizable toolbars and menus, standard Windows color scheme, spell check, DLL addins, file menu export feature, drag-and-drop between remote sites, comparing sites by timestamp were removed in this version. Other features do not work reliably or are incomplete, like Undo for instance. Version 3 introduced Expression Web 3 SuperPreview tool for comparing and rendering webpage in various browsers. Also noted was the lack of support for root relative links, links that start with a "/" to refer to the root of a web server. This feature was added with Expression 3 Service Pack 1. The version of Expression Encoder Pro 4 available as part of Expression Studio in programs like DreamSpark, BizSpark, WebsiteSpark and through MSDN Ultimate does not include royalty incurring codec and standards support for exporting in MP4 format (H.264 video and AAC audio). It also does not include import filters for TS, M2TS, AVCHD, MPEG-2, and AC-3 although if third party DirectShow filters are installed, it is able to import these formats as is the free version. Expression Encoder Pro version available in retail does not have these limitations. The free version available to everyone and included in MSDN Premium lacks IIS Live Smooth Streaming and unlimited screen capture. With the release of Expression Studio 4, three editions of Expression Studio were introduced: Expression Studio 4 Web Professional (includes Expression Encoder, Design and Web), Expression Studio 4 Premium (adds Blend to the suite) and Expression Studio 4 Ultimate (adds SketchFlow). MSDN subscribers receive only the SKU of Expression Studio 4 that corresponds to their Visual Studio 2010 license. As such, MSDN Premium users do not get SketchFlow. Some editions of Expression Studio also include product activation. See also Relatives Microsoft FrontPage, the predecessor to Expression Web Creature House Expression, the predecessor to Expression Design iView Media, the predecessor to Expression Media