Excel 2010 - Save as XML

Hi folks,
I have a simple workbook that was created from importing a CSV file. It
just contains 4 columns of data.

I would like to export the data as XML file. There is a Save as XML option
but it complains about having no XML mappings and does not work. The XML
mappings feature requires one loads an existing schema file (which does not
exist because the data was imported from CSV)

Using google there are plenty of posts about how one should have a schema
(mapping) and then load an existing XML file, but none on how to create a
simple XML file from a simple workbook.

Does anyone know how to save simple tabular data as XML as it appears
microsoft do not (or at least its not obvious due to poor product usability).