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.
