2. The method of claim 1 , wherein said organizing the data into a network comprises organizing the data into a hierarchy.
3. The method of claim 2 , wherein said organizing the data into a hierarchy comprises organizing the data into a hierarchy having a plurality of levels including a first level associated with said at least one predecessor group and a second level associated with at least a portion of said plurality of descendant groups, said first level being higher than said second level in said hierarchy.