Extension:Semantic MediaWiki

Semantic MediaWiki is an extension for managing structured data in your wiki and for querying that data to create dynamic representations: tables, timelines, maps, lists, etc. The actual homepage of Semantic MediaWiki, including user documentation in multiple languages, is semantic-mediawiki.org. There are various other pages in the MediaWiki and Wikipedia space related to SMW, but the homepage is the most up-to-date source of information.

There are a large number of "spinoff" extensions that require the presence of Semantic MediaWiki; see the category Semantic MediaWiki extensions for the full list (some of these extensions are obsolete).

Download and Installation
The respective instructions are located on the help page about the installation.

Make sure to set Compatibility Mode with other extensions
If your wiki has Extension:Cargo or Wikibase installed on the same wiki as Semantic Mediawiki you need add the following to your LocalSettings.php to have it work:

$smwgEnabledCompatibilityMode = true;