16. The computer program product according to claim 15 , further comprising instructions for defining at least one modified tagging tree by replacing at least one execution node with at least one mapping.
15. The computer program product according to claim 13 , further comprising instructions for defining at least one mapping, wherein each of the at least one mapping defines a correspondence between data produced by a database query command within the at least two of the plurality of execution nodes and data objects within the set of objects, and wherein the instructions for placing at least one data object comprise placing at least one data object within the set of data objects into at least one field of the plurality of fields based upon the at least one mapping.