For people who want more information about what particular elements/attributes mean, there's http://msdn.microsoft.com/en-us/library/gg699485(v=vs.85).aspx http

For people who want more information about what particular elements/attributes mean, there's http://msdn.microsoft.com/en-us/library/gg699485(v=vs.85).aspx http://msdn.microsoft.com/en-us/library/gg699485(v=vs.85).as... There are also steps on that page for getting your site off of the compatibility list.