anki.xml

<?xml version="1.0"?>
 <mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>

   <mime-type type="application/x-anki">  
   <comment>Anki 1.2 deck</comment>
   <glob pattern="*.anki"/>
   </mime-type>

   <mime-type type="application/x-apkg">  
   <comment>Anki 2.0 deck</comment>
   <glob pattern="*.apkg"/>
   </mime-type>

 </mime-info>