Added Bill Cleveland (NASA Ames Research Center's SimLab) and Brent York (NAVAIR's Manned Flight Simulator) to the acknowledgments section, to thank them for their pioneering initial trials of DAVE-ML.

Added provenanceRef element and changed all parents (specifically function, griddedTableDef and ungriddedTableDef elements) of provenance elements to enable them to use a provenanceRef reference instead to eliminate duplicate provenance elements.

Realization dawned that there was little difference between griddedTables and griddedTableDefs but that the latter was more flexible (ditto ungriddedTables and ungriddedTableDefs). By making the gtID and utID attributes 'implied' instead of 'required,' we can use the Def versions in both referenced-table and embedded-table functions. Thus the original griddedTable and ungriddedTable elements have been marked as 'deprecated.' They are still supported in this DTD for backwards compatibility but should be avoided in future use. The easiest way to modify older DAVE-ML models would be to rename all griddedTables as griddedTableDefs.