11. The system of claim 10 , wherein the content added to the second hierarchical data model is a plurality of links.
11. The system of claim 10 , wherein the content added to the second hierarchical data model is a plurality of links. 12. The system of claim 11 , wherein the at least one computer also compares the first hierarchical data model to the second hierarchical data model and ignores the result of a filter pass based on the comparison.