Property:Schema type
From neox4t wiki
"Schema type" is a predefined property that describes a type to distinguish a group of schemata and is provided by Semantic MediaWiki. Each type provides its own interpretation of syntax elements and application rules and can be expressed with the help of a validation schema. 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.