This extension hook has no documentation on MediaWiki.org. Please improve MediaWiki by adding documentation to it. See Template:ExtensionHook for instructions on how to do it.

For examples of extensions using this hook, see Category:BSSocialTagsBeforeSetTags extensions . Category:Extension hooks#BSSocialTagsBeforeSetTags Category:Undocumented extension hooks#BSSocialTagsBeforeSetTags Category:Extension hooks provided by SocialTags Category:Extension hooks#BSSocialTagsBeforeSetTags Category:Undocumented extension hooks#BSSocialTagsBeforeSetTags Category:Extension hooks provided by SocialTags