Description: The subindex value for this parameter. If the parameter is naturally considered to contain a variable number of members of a class, e.g. members of the DBA user group, or files which are part of the database, then it must be presented as a set of rows. If, on the other hand, the parameter represents a set of choices from a class, e.g. the permissions on a file or the options chosen out of the set of all options allowed, AND is guaranteed to always fit in the 255 character length of a DisplayString, then it may be presented as a comma separated list with a subindex value of one. Zero may not be used as a value.