First real open standard for content identification.
DOI is a number that identifies a digital object:
- 10 Registration Agency Prefix
- 1063 Publisher Prefix
- S000369519903216 Suffix (Publisher-assigned ID)
Suffix can be SICI or PII.
The DOI and URL pointing to the digital object, is registered with the International DOI Foundation, e.g:
- 10.1063/333 | http://www.pubsite.org/apr99/artl1.pdf