Property:Query string
From HackerspaceWiki
"Query string" is a predefined property that describes the conditions of the query as a string and is provided by Semantic MediaWiki. 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.
This is the page of special property Query string. It lists all pages using this special property. See the help page Special property Query string for further information.