One of Longhorn’s most interesting technologies for developers is its new XML-based markup language, codenamed XAML (short for eXtensible Application Markup Language, and pronounced “Zammel”). User interfaces in Longhorn applications are typically built using XAML
XAML is actually an open standard. So technically, anyone could write to it or for it.
DonXML did a good intro on XAML on his blog:
XAML from a standards point of view
Another XAML link for good measure. 😉
Blogs for xaml can be found at