yuml-mediawiki
Yuml for Mediawiki (Fork)
YUML Mediawiki version 2020
To install it, put the code above in extensions/yUML/yUML.php and add the line
require_once( "$IP/extensions/yUML/yUML.php" );
to your LocalSettings.php in your MediaWiki folder.
Official tutorial from Sindri Traustason for exemple : http://wiki.sindri.info/wiki/YUML_MediaWiki_Extension