http://blogs.iis.net/webdevelopertips/archive/2009/06/18/tip-81-did-you-know-how-to-select-the-css-schema-for-intellisense-and-css-properties.aspxIn Visual Studio 2008, there is a Style Sheet Toolbar (visible only when a CSS file is active) which allows the user to select a CSS Schema, as seen in this screen shot:   However, this setting only affects the CSS editor, not the Intellisense inenCommunityServer 2007 SP1 (Build: 20510.895)