olemus
13-kohaline numberkood noodiväljaannete identifitseerimiseks,
ISBN analoog
= a unique thirteen-digit number for the identification of all notated music editions from all over the world

struktuur
https://www.loc.gov/ismn/structure.html

näiteid
https://duckduckgo.com/?q=ismn+code&t=h_&iar=images&iax=images&ia=images

ülevaateid
http://www.ismn-international.org/

https://en.wikipedia.org/wiki/International_Standard_Music_Number

standardid
https://www.iso.org/obp/ui/#iso:std:iso:10957:ed-2:v1:en