[API-users] [External] occurrenceID as a search parameter

Both I and the programmer I'm working with have looked through the API documentation and we don't see occurrenceID as a search parameter. That surprised me, since I thought it was a required field. If we could search for it, we could map any assigned occurrenceID to the GBIFID. I'm sure that there is probably some more indirect way to accomplish this (such as retrieving all records that we have provided, but it seems like this ought to be a simple thing to facilitate. Am I missing something?

Steve