<Cell> <Data ss:Type="Number">25</Data> </Cell>
As far as I’m concerned, that’s valid XML. However Excel 2003 complains when it opens up that XML document with a message in a dialog box, “Problems During Load”.
Why does Microsoft doesn’t really conform to XML ?
Update: I don’t understand how http://www.microsoft.com/downloads/en/details.aspx?FamilyId=FE118952-3547-420A-A412-00A2662442D9&displaylang=en can require one single line xml style ?
Excel supports XML-based files, but the file must conform to some rules (excel XML sheet XSD schema).
Look at this example:
Try export a sample excel sheet to an XML file to preview the structure.
Here is Office 2003 XML Reference Schemas Set.