Using The ISSN (International Serial Standard Number) as URN (Uniform Resource Names) within an ISSN-URN Namespace

Uniform Resource Names (URNs)

“…These issues are beyond the scope of URN syntax and the general rules for URN namespaces, because they are specific to the community defining a non-URN identifier system or a particular URN namespace (e.g., the bibliographic and publishing communities in the case of the "ISBN" URN namespace [RFC3187] and the "ISSN" URN namespace [RFC3044] or the developers of extensions to the Extensible Messaging and Presence Protocol [RFC6120] in the case of the "XMPP" URN namespace [RFC4854]).…”

“…A URN namespace is a collection of such URNs, each of which is (1) unique, (2) assigned in a consistent and managed way, and (3) assigned according to a common definition. (Some URN namespaces create names that exist only as URNs, whereas others assign URNs based on names that were already created in non-URN identifier systems, such as ISBNs [RFC3187], ISSNs [RFC3044], or RFCs [RFC2648]. )…”

Uniform Resource Name (URN) Namespace Registration Transition

“…The existing RFCs that describe URN namespaces for ISSNs [RFC3044] and ISBNs [RFC3187] have been identified as "Historic" concurrent with publication of this document. The new registration templates for those namespaces have already been submitted and incorporated into the URN Namespaces registry by IANA.…”

“…URN namespaces were subsequently registered for ISBN [RFC3187] and ISSN [RFC3044] as well as for a fairly large collection of other identifiers including National Bibliography Number (NBN) [RFC3188]. The comprehensive list can be found in the IANA Uniform Resource Names (URN) Namespaces registry [IANA-URN] (see also Section 4).…”

URNs for the Alert-Info Header Field of the Session Initiation Protocol (SIP)

“…Unlike most other currently registered URN namespaces, the "alert" URN does not identify documents and protocol objects (e.g., [RFC3044] The <alert-URN>s are hierarchical identifiers. An <alert-URN> asserts some fact or feature of the offered SIP dialog, or some fact or feature of how it should be presented to a user, or of how it is being presented to a user.…”