$wgExceptionHooks = array();
/**
- * Page property link table invalidation lists. Should only be set by exten-
- * sions.
+ * Page property link table invalidation lists. When a page property
+ * changes, this may require other link tables to be updated (eg
+ * adding __HIDDENCAT__ means the hiddencat tracking category will
+ * have been added, so the categorylinks table needs to be rebuilt).
+ * This array can be added to by extensions.
*/
$wgPagePropLinkInvalidations = array(
'hiddencat' => 'categorylinks',