Aus SubmersWiki

In SMW+, a property gives machine-processable description of some feature of an object, such as its weight, size, location, or its owner. The property is written as an annotation in the article about the object that it describes.
Properties that establish relationships between two pages this way are sometimes called relations.A property can have, but does not require, a page in the wiki.
The special properties appear in italics in the factbox of pages that use them, do not use these reserved names as your own properties.