URN identifier is the unique and permanent identifier of an online publication. The URN identifier given to a document will not change as long as the identity and name of the publication remain the same. The URN identifier will only be changed if the publication’s contents change in some essential manner. The same identifier will never be given to another publication. A URN-based identifier is only allocated to digital documents.
Cite this article as: OAResources, "URN identifier," in Open Access Resources, September 7, 2018, https://oaresources.org/resources/urn-identifier/.