What happens when “979” ISBNs are introduced?
The only difference between a 979 and a 978 ISBN is that a 979 title does not have a 10-digit equivalent (i.e. you cannot convert a 13-digit 979 ISBN to a 10-digit ISBN as you can with a 13-digit 978 ISBN). As 13-digit 979 ISBNs are introduced, your catalog will have a mixture of 978 and 979 ISBNs in the 13-digit ISBN location; 979 ISBNs will have spaces (blanks) in the 10-digit ISBN location of their catalog record.
