Extension:SearchExtraNS/ja

SearchExtraNS is an extension to improve search results.

Called after a search has no match for the exact result, but before any case variant is tested, it tries to find a direct match in extra specified namespaces, that is the namespace mentioned as prefix of the keyword. A side-effect is that the advanced search will no longer restrict results to the namespaces you select, but will always be extended to such namespace too.