Property:Subproperty of

The property namespace is disabled, attempting to declare a type or other property specific characteristics for this property is not possible.

"Subproperty of" is a declarative predefined property to define that a property is a subproperty of another 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.