16. A computing system of claim 15 , wherein the modification sub-expression includes one or more elements, and the base expression modifier is configured to generate a sub-expression containing the target update expression segment and having the smallest number of elements.
16. A computing system of claim 15 , wherein the modification sub-expression includes one or more elements, and the base expression modifier is configured to generate a sub-expression containing the target update expression segment and having the smallest number of elements. 17. A computing system of claim 16 , wherein the first expression expander and the second expression expander execute a function that relies on a defined ontology.