SFC curv implemen semantic p2p

Map d-keywords to a d-dimentional space. Use Space Filling Curves (SFC) to map nodes in the d-dimention space to a point in the 1-dimention  SFC curve. Then use Chod to store the points/cluster. can do complete query, partial query and wildcard query.

potontial proble: since a resouce coresponds to a point in the d-dim space. how to map resouce which don't have exactly d keywords? it's not a point in the space.  Load balancing.