My pass1 mode is going to create an exact copy of the source
bibliographic collection, with the only difference being that
the year
strings get the proper suffix appended.
That's probably the cleanest way of doing it. Another approach would be for
phase 1 to create a small document that contains only the additional
information needed, and for phase 2 to merge this with the original data;
but I'd avoid that unless the sizes are mega-big.
Michael Kay