title: How to read/convert Excel XML files to R/CSV?
body: <p>I have few hundred XML files. They are probably generated from/to Excel. I would like to read it to R or convert to CSV. Headers of all files look like this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;?mso-application progid="Excel.Sheet"?&gt;
  &lt;Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
   xmlns:o="urn:schemas-microsoft-com:office:office"
   xmlns:x="urn:schemas-microsoft-com:office:excel"
   xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
   xmlns:html="http://www.w3.org/TR/REC-html40"&gt;
  &lt;DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"&gt;
  </code></pre>
  
  <p>I can always write parser, but would like to avoid doing it. I don't have Excel</p>