Property:Corresponds to
From SUWS-wiki
"Corresponds to" is a declarative predefined property to define conversion factor for some unit of a physical quantity 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.
corresponds to is a special property in Semantic MediaWiki with a built-in meaning: it gives the conversion factor for some unit of a physical quantity and the possible names for that unit. See Help:Custom units for the details.