National Bibliography Number
National Bibliography Number (NBN) is a group of publication identifier systems used by national libraries in countries such as Germany , Italy, Finland , Norway , The Netherlands and Sweden. There is no global standard for the contents of NBNs; instead, they have a country-specific format. NBNs are typically used for documents which do not have a publisher-assigned identifier such as an ISBN. They can be used to identify media archived in national libraries, such as Ph.D. theses.
A Uniform Resource Name (URN) namespace for NBNs has been assigned [1], and is described in IETF RFC 3188 RFC 8458. For example:
urn:nbn:de:bvb:19-146642
An NBN in Germany (de), in Bavaria (bvb = Bibliotheksverbund Bayern), library number 19 (University Library Munich), pointing to a PhD thesis on heat detection in cattle.
Some libraries, such as the National Library of Sweden, provide a resolution service for these URNs.[2]
In Italy an NBN (NBN:IT) is assigned to digital resources deposited in the National Legal Deposit service [3]. The NBN:IT resolver is active at: http://nbn.depositolegale.it/
In The Netherlands the NBN (URN:NBN:NL) is assigned by the National Library (KB)
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