14. The computer system of claim 13 , wherein the instructions further comprise instructions for displaying path expressions which are associated with the determined paths, wherein a path expression is an alternating sequence of entity names and relationship names.
14. The computer system of claim 13 , wherein the instructions further comprise instructions for displaying path expressions which are associated with the determined paths, wherein a path expression is an alternating sequence of entity names and relationship names. 15. The computer system of claim 14 , wherein the instructions further comprise instructions for using the determined path expressions to determine how to access an instance of the second entity by using an instance of the first entity.