Specify the generation number of the table in this field. The default is the most recent generation.
A generation is a version of a table. Every time a table is edited and stored, a new version is created and stored in the library as the most recent generation. The number of generations retained is specified in the table definition.
A positive number indicates an absolute generation number (range 1 to 255), for example, if 3 is specified the third generation of the table is selected. A zero or negative number (range 0 to -9) indicates a relative generation (relative to the most recently stored generation), for example, -1 is the previous generation.