A new method, OEMCSFragDatabase::IsIndexed, has been
added to determine whether a particular molecule index has been
registered in the database. Depending on the indexing option settings, a
particular molecule may be rejected from indexing. This method
allows that condition to be interrogated.
supports the ability to merge indices generated from segments of a large
set of input structures. This capability can be used in a
parallel processing approach to increase the throughput of the
time-consuming structure indexing phase.