<https://www.casiomusicforums.com/index.php?/topic/22013-showing-off-slash-chords/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.casiomusicforums.com/index.php?/topic/22013-showing-off-slash-chords/#comment-83996>