Made gtID and utID required attributes of griddedTableDef and ungriddedTableDef instead of optional, to make it easier for parsers to deal with the table definitions. Previously these attributes were only required of tables that were to be reused by more than one function, but feedback from several tool implementers made this change desirable.

Changed the definition of the staticShot element to allow zero or more checkInput children. Previously at least one input had to be specified in a checkcase, which didn't allow verification of constant-only models with no inputs.

Added optional minValue and maxValue attributes to the variableDef element so models can specify limits of acceptable ranges of values for inputs, initial values, or calculation results. Also added a paragraph to the independentVarRef element description to reinforce that these attributes are independent range constraints that act in series with any subsequent independentVarRef's min or max range attributes.