Does Z39.50 support write operations? 

We here at Notre Dame may be working with a vendor in the near future who will be reading our MARC bibliographic records via Z39.50. I have also been told, not necessarily by the vendor, that these same records will be updated and reinserted back into our catalog by the vendor. I am quite familiar with Z39.50's ability to search and download content, but I am not familiar with its ability to write back to the server. Is this possible?

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Eric Lease Morgan
University of Notre Dame