This is the "empty element" of the <a href="//commons.wikimedia.org/w/index.php?title=Category:Icons_for_railway_descriptions&amp;action=edit&amp;redlink=1" class="new" title="Category:Icons for railway descriptions (page does not exist)"><i>Icons for railway descriptions</i></a> (see there for further informations). The original syntax of Wikipedia:Route diagram templates filled all empty spaces in a diagram with this file (all BSicons were 20x20px). For those cells where an icon ID was provided, some "File:BSicon_ID.svg" were used, and where there was no ID, "File:BSicon_.svg" was substituted. Many major Wikipedias has since upgraded the syntax so that just an empty table cell is used (incl. En.WP).
<a href="//commons.wikimedia.org/wiki/User:Antonsusi" title="User:Antonsusi">Antonsusi</a>
2010-05-01
<span class="int-own-work" lang="en">Own work</span>