Property:Display units
[http://www.nga.gov/content/ngaweb/research/casva/research-projects.html A Project of the National Gallery of Art, Center for Advanced Study in the Visual Arts ]
"Display units" is a declarative predefined property to define units of display for numeric typed properties and is provided by Semantic MediaWiki. A comma-separated list allows to describe units or formats to be used for the display. 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.