SQLXML 4.0 Beta (2005)

Folks:

I thought I would try the .NET framework 2.0 beta version of SQLXML.4.0
and am running into a problem.

When I add a project reference to Microsoft.Data.SqlXml in Visual
Studio .NET Beta 2, I cannot compile the project. I get the "Are you
missing an assembly reference?" error. Intellisense also does not seem
to recognize the namespace.

Any clues on what the problem is?

Will using SQLXML.4.0 within the context of a DTC transaction work,
especially updategrams?

The idea of annotated schemas as a way to bridge relational world and
middle-tier XML has been tempting me for a while - but the lack of DTC
support always stopped this idea cold. I am hoping that the new
bleeding-edge stuff has solved this issue..

Thanks for any guidance or advice..