I just tried to read the xml files in data\English via the .NET XML API. Three files where reported as invalid, because there are two root elements. That's not allowed in XML. There can only be one root element for a document. The files are DLC02_Items.xml, DLC03_Items.xml and DLC05_Items.xml. There is always a <GameItemTypes> and a <GameItemTypeArtDefs> element at the top level.
