From a large sample of data that we get from publishers: * Only 24.5% with one ISBN! * 40% with multiple ISBNs! * Largest group has no ISBN! ISBN Count Percentage of records with X ISBNs 0 38.57% 1 24.49% 2 17.00% 3 5.88% 4 10.77% 5 2.14% 6 0.65% 7 0.09% 8 0.12% 9 0.24% 10 0.04% Thanks, Shlomo Experience the all-new, singing and dancing interactive Primo brochure -----Original Message----- From: Bibliographic Framework Transition Initiative Forum [mailto:[log in to unmask]] On Behalf Of J. McRee Elrod Sent: Sunday, May 19, 2013 20:34 To: [log in to unmask] Subject: Re: [BIBFRAME] Instance of ISBNs in MARC records In SLC's database of over 300,000 records, over 169,000 have no ISBN, over 114,000 have one, over 19,000 have two, and the number of ISBNs ranges up to 36 in one record. For us, Instances can't be based on ISBNs. Total Records: 315389 020s Records 00 169021 01 114221 02 19745 03 7403 04 3238 05 1149 06 344 07 118 08 29 09 42 10 11 11 16 12 10 13 12 14 4 15 5 16 3 17 7 18 1 19 1 21 1 22 1 23 1 25 3 27 1 28 1 36 1 __ __ J. McRee (Mac) Elrod ([log in to unmask]<mailto:[log in to unmask]>) {__ | / Special Libraries Cataloguing HTTP://www.slc.bc.ca/ ___} |__ \__________________________________________________________