63. The method of claim 41 , wherein the plurality of data tunnels and respective operators relate to —instances of entities of arbitrary structure.
63. The method of claim 41 , wherein the plurality of data tunnels and respective operators relate to —instances of entities of arbitrary structure. 67. The method of claim 63 , wherein the plurality of data tunnels and respective operators relate to instances of an entity type wherein distinct instances of said entity type differ in structure.