non-releases/trunk_before_flattening/src/documentation/src/content/xdocs/c21-overview/meta.xml

<?xml version="1.0"?>
<meta>
  <authors>
    <author contact="http://cocoon.apache.org">Cocoon Community</author>
  </authors>
  <source>legacy.21</source>
  <legacy>
    <original-filename>overview.html</original-filename>
  </legacy>
</meta>