39. The method of claim 28, wherein the evaluating step further comprises evaluating an operator effective to distill a multi-value operand, having one or more values corresponding thereto and arising from a single record, into a single result value.
39. The method of claim 28, wherein the evaluating step further comprises evaluating an operator effective to distill a multi-value operand, having one or more values corresponding thereto and arising from a single record, into a single result value. 40. The method of claim 39, wherein the operator is an aggregrator operator.