The only straight BS plug I've ever seen!
Hereoutdoor receptacles are usually IP 54 IIRC. They have a spring loaded lid that forms a "roof" over the plug when in use. I think they are not rated for permanent use. Personally I'droute such cords inside through a piece of conduit. All circuits have to be RCD-protected at the panel,so it doesn't matter whether indoor or outdoor receptacle. If possible outdoor receptacles are located on balconies,porches etc.