A cataloging query

[Dr. M.N. Ben-Eliahu]

We are trying to upgrade our ACCESS database for the invertebrates collection. 
The query is, for those of you involved in cataloging of this sort, do you 
have a separate category for genus and a separate (non-linked) category for 
species? Or do you put in genus and species together as one (linked) category? 
 
Presently our program, if you put in a family, will give the list of genera 
within that family, and species within that genus, but somehow it got 
complicated and the computer programmer has asked the above question.  

Your earliest possible input will be very much appreciated.

   Hope to see many of us very soon in Madrid!

             Thanks in anticipation of  some helpful suggestions.

                        Nechama Ben-Eliahu

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