8. The method of claim 1 , wherein associating the one or more matching chemical structures with the respective source file further comprises associating a respective hierarchical level of each chemical structure of the one or more matching chemical structures with the respective source file, wherein the respective hierarchical level relates to a hierarchical level of the respective chemical structure within a particular dictionary of the at least one dictionary in which the respective chemical structure resides.
9. The method of claim 8 , wherein generating the first virtual relational network comprises generating a hierarchical network corresponding to the hierarchical levels of the one or more matching chemical structures of each respective source file of the first collection of source files.