*Music in the background* Super-Gwailo !!!
Not sure if this help, but here's what I found :
All-purpose flour : Flour made from a blend of hard or soft wheats suitable for all cookery except the finest cakes
Self-raising flour : "Self-raising" flour is simply one that contains a leavening agent, and is identical to plain flour with salt and baking powder added. The advantage of self-raising is that the agents are thoroughly homogenized with the flour to obtain baking uniformity.