Property: Property description
From IBL Wiki Demo
"Property description" is a predefined property that allows to describe a property in context of a language 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.
URL of the homepage of something, which is a general web resource. (en) +
A person known by this person (indicating some level of reciprocated interaction between the parties). (en) +
The property that determines that two given individuals are different. (en) +