Property:MIME type
From semantic-mediawiki.org
"MIME type" is a predefined property that describes the MIME type of an uploaded file and is provided by Semantic MediaWiki. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.
This is the page of special property MIME type. It lists all properties using this special property. See the help page Special property "MIME type" for further information.