Microsoft Watch: "One source close to the company said that Microsoft has held internal discussions to kick around ideas for XML-specific language, referred to internally as 'X#'." (via Managed Space) [Brian Jepson's Radio Weblog]

(a) Dig out your PDC2001 CD.
(b) Look for the "XLANG/s" sample
(c) Look at the assemblies with ILDASM