hi andywt,
You will need to create an IXMLDomDocument2
Dim projectCategory As IXMLDOMDocument2 = e.XDocument.GetDOM(''Project Category'')
projectCategory.setProperty(''SelectionNamespaces'', ''Namespace'')
Here instead of ''NameSpace'' copy all of the namespaces like xmlns:xsi=''...'' from your secondary dom over to here. For details on the ...