Help:Special properties

This page describes the  special properties that are built-in to Semantic MediaWiki (SMW). They are needed to make the system work. They appear in a page's factbox, on and on  in italic. Since, special properties can be used in browsing interfaces and inline queries just like all other properties. Also see the help page properties and types for more information.

Special properties may also be provided by extensions to Semantic MediaWiki like, e.g. or, etc. These however are currently not being documented here.

The names and aliases of special properties are reserved and cannot be used for other properties. Additionally special properties should only be used according to their documented purpose! It is not necessary to create pages for special properties. They will perform their special behavior even if your wiki does not have a property page for it.

Applying styles
In case you would like to make special properties easier to be identified in the factbox, on and on  just add, e.g. the following CSS code to the MediaWiki:Common.css page.