[Koha] Publication dates in Koha

[Tobin, Jessica L]

Greetings,
     What is the difference between biblio.copyrightdate and
biblioitems.publicationyear?  Where does the metadata that populates
these columns come from?

Thanks,
Jess

________________________________________
Jessica L. Tobin
Technical Services & Systems Librarian                 
Arnold Library | Fred Hutchinson Cancer Research Center | Seattle, WA
jtobin at fhcrc.org  |  tel 206.667.6846 |  fax 206.667.4737