$wgFileExtensions[] = 'ods';
$wgFileExtensions[] = 'svg';
$wgFileExtensions[] = 'osm';
+$wgFileExtensions[] = 'odg';
<% @mediawiki[:extra_file_extensions].each do |mw_extra_file_extension| -%>
$wgFileExtensions[] = '<%= mw_extra_file_extension %>';
<% end -%>