What SMW can do
From Semantic MediaWiki at Wikipedia,
Semantic MediaWiki (SMW) is an extension to MediaWiki that allows for annotating semantic data within wiki pages, thus turning a wiki that incorporates the extension into a semantic wiki. Data that has been encoded can be used in semantic searches, used for aggregation of pages, displayed in formats like maps, calendars and graphs, and exported to the outside world via formats like RDF and CSV.
From semantic-mediawiki.org,
How SMW is used on Appropedia
Implemented,
Extensions used,