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 -- Steven J. Baskauf, Ph.D., Senior Lecturer Vanderbilt University Dept. of Biological Sciences postal mail address: PMB 351634 Nashville, TN 37235-1634, U.S.A. delivery address: 2125 Stevenson Center 1161 21st Ave., S. Nashville, TN 37235 office: 2128 Stevenson Center phone: (615) 343-4582, fax: (615) 322-4942 If you fax, please phone or email so that I will know to look for it. http://bioimages.vanderbilt.edu http://vanderbilt.edu/trees