DOI - Schema

DOI, aka Digital Object Identifier, is a schema created in 2000.

#76on PLDB

24Years Old

The DOI system provides a technical and social infrastructure for the registration and use of persistent interoperable identifiers, called DOIs, for use on digital networks.

DOI website
DOI Wikipedia page
DOI docs
DOI first developed in International Organization for Standardization
doi.org was registered in 1999

Example from the web:

https://doi.org/10.1000/182