4. The method of claim 1 , wherein the zero or more dependent branches corresponding to the paths are determined recursively from the root number.
4. The method of claim 1 , wherein the zero or more dependent branches corresponding to the paths are determined recursively from the root number. 5. The method of claim 4 , wherein the zero or more dependent branches corresponding to a given path are further determined based at least in part on a total number of branches in the hierarchy and a directory number of an immediately preceding document in the hierarchy.