title: Excel Workbook.XmlMaps
body: <p>I have some VBA code which is falling over on a line with <code>Workbook.XMLMaps</code>. What exactly is this? There are no direct references to opening a ".xml" file within the VBA.</p>
  
  <p>Is there some sort of repository of xml files within the sheet? If so, how can I find out what this is?</p>