From a large sample of data that we get from publishers:
 
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
 
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-----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])
  {__  |   /     Special Libraries Cataloguing   HTTP://www.slc.bc.ca/
  ___} |__ \__________________________________________________________