"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.
[[:Technician (Stargate)]] <q> <q>[[Main character of:: <q>[[Category:Episodes]] [[Season::Stargate Universe Season 2]]</q> ]]</q> OR <q>[[Recurring character of:: <q>[[Category:Episodes]] [[Season::Stargate Universe Season 2]]</q> ]]</q> OR <q>[[One shot character of:: <q>[[Category:Episodes]] [[Season::Stargate Universe Season 2]]</q> ]]</q> OR <q>[[Minor character of:: <q>[[Category:Episodes]] [[Season::Stargate Universe Season 2]]</q> ]]</q> </q>