ODBC Adapter, Execute, Pass @xml data as Stored Procedure xml parameter - how?

Hello,

I have a stored procedure that accepts a XML parameter (@xml).  The procedure handles the XML and uses it to process the data (can contain hundreds of items).

It appears that the ODBC Adapter requires the Message Body to be a XML formatted to make the call.

<Statement type="StoredProcedure" sql="{Call uspUpdatePhoneNumber(?)}">

    <Parameters>

        <Parameter type="varchar" name="@xml" value="<Root><Item><val1>A<val1><val2>123</val2></Item><Item><val1>B</val1><val2>456</val2></Item></Root>"/>

    </Parameters>

</Statement>

How can I inject the XML data into this call so it sends the XML parameter to the stored procedure?

This is going against SQL Server.  I am unable to figure out 2 things:

1) the SQL XML DataType for ODBC; and

2) how can I pass the XML to the Stored Procedure parameter?

In the Business Process SQL step, this was trivial.  The message body (OuterXML) was the XML.