Extension default namespaces

To prevent conflicts in new namespaces added by extensions, please "register" your extension's namespace here. If a constant for the custom namespace exists, you can list it here too.

LiquidThreads

 * 90 Thread: (constant: NS_LQT_THREAD)
 * 91 Thread_talk: (constant: NS_LQT_THREAD_TALK)
 * 92 Summary: (constant: NS_LQT_SUMMARY)
 * 93 Summary_talk: (constant: NS_LQT_SUMMARY_TALK)

Semantic MediaWiki & Semantic Forms

 * 100 Relation: (constant: SMW_NS_RELATION; no longer used, as of version 1.0; support dropped with 1.5.0)
 * 101 Relation_talk: (constant: SMW_NS_RELATION_TALK; no longer used, as of version 1.0; support dropped with 1.5.0)
 * 102 Property: (constant: SMW_NS_PROPERTY)
 * 103 Property_talk: (constant: SMW_NS_PROPERTY_TALK)
 * 104</tt> Type: (constant: SMW_NS_TYPE)
 * 105</tt> Type_talk: (constant: SMW_NS_TYPE_TALK)
 * 106</tt> Form: (constant: SF_NS_FORM)
 * 107</tt> Form_talk: (constant: SF_NS_FORM_TALK)
 * 108</tt> Concept: (constant: SMW_NS_CONCEPT)
 * 109</tt> Concept_talk: (constant: SMW_NS_CONCEPT_TALK)

RefHelper

 * 120</tt> Cite (constant: NS_CITE)
 * 121</tt> Cite_talk (constant: NS_CITE_TALK)

DeleteQueue

 * 140</tt> Deletion: (constant: NS_DELETION)

Semantic Drilldown

 * 170</tt> Filter: (constant: SD_NS_FILTER)
 * 171</tt> Filter_talk: (constant: SD_NS_FILTER_TALK)

SocialProfile

 * 200</tt> UserWiki: (constant: NS_USER_WIKI)
 * 202</tt> User_profile: (constant: NS_USER_PROFILE)

Widgets

 * 274</tt> Widget: (constant: NS_WIDGET)
 * 275</tt> Widget_talk: (constant: NS_WIDGET_TALK)

PackageForce

 * 1300</tt> PackageForce: (constant: NS_PACKAGEFORCE)
 * <tt>1301</tt> PackageForce_talk: (constant: NS_PACKAGEFORCE_TALK)

Wikidata
uses several custom namespaces

Semantic MediaWiki, Semantic Forms, and Semantic Drilldown
As used on several Wikia sites
 * <tt>302</tt> Property:
 * <tt>304</tt> Type:
 * <tt>306</tt> Form:
 * <tt>308</tt> Concept:
 * <tt>370</tt> Filter:
 * and associated Talk pages #+1