[ViktorShchedrin]

Hello !

Calibre collection have ISBNs like below
978-0-307-42468-6 (e ISBN)
978-1-84064-454-8
978 0 7181 1659 1
9781840644548
9780553589597

i think the good idea to normalize all isbns as 978-0-307-48912-8 and 978-1-84064-454-8, is it ? (my library have only English books, 978-0- or 978-1- should be...)

please advice, how can i do that by Edit metadata by bulk ?

thank you