Currently only data attributes reserved to MediaWiki are allowed
(see Sanitizer::isReservedDataAttribute).
+'DeleteUnknownPreferences': Called by the cleanupPreferences.php maintenance script to build a WHERE clause with which
+to delete preferences that are not known about. This hook is used by extensions that have dynamically-named preferences
+that should not be deleted in the usual cleanup process. For example, the Gadgets extension creates preferences prefixed
+with 'gadget-', and so anything with that prefix is excluded from the deletion.
+&where: An array that will be passed as the $cond parameter to IDatabase::select() to determine what will be deleted
+ from the user_properties table.
+$db: The IDatabase object, useful for accessing $db->buildLike() etc.
+
'DifferenceEngineAfterLoadNewText': called in DifferenceEngine::loadNewText()
after the new revision's content has been loaded into the class member variable
$differenceEngine->mNewContent but before returning true from this function.
or request state must be added through MakeGlobalVariablesScript instead.
&$vars: array( variable name => value )
-'ResourceLoaderGetLessVars': DEPRECATED! Called in ResourceLoader::getLessVars
-to add global LESS variables. Loaded after $wgResourceLoaderLESSVars is added.
-Global LESS variables are deprecated. Use ResourceLoaderModule::getLessVars()
-instead to expose variables only in modules that need them.
-&$lessVars: array of variables already added
-
'ResourceLoaderJqueryMsgModuleMagicWords': Called in
ResourceLoaderJqueryMsgModule to allow adding magic words for jQueryMsg.
The value should be a string, and they can depend only on the