IETF M. Ortseifen Internet-Draft G. Dickfeld Intended status: Informational Deutsche Bundesbank Expires: March 15, 2014 September 11, 2013 A Uniform Resource Name (URN) Namespace for Eurosystem Messaging draft-bundesbank-eurosystem-namespace-02 Abstract This document defines and registers with IANA a Uniform Resource Name (URN) namespace that is managed by Deutsche Bundesbank (member of ESCB) for usage within messages standardized by the Eurosystem. Discussion This draft version is submitted for formal urn-nid Expert Review according to the procedures specified in RFC 3406 for a Formal NID application. Comments should be sent to the urn-nid@ietf.org mailing list and copied to the document editors at the 'role' email address given in the Authors Section. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on March 15, 2014. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. Ortseifen & Dickfeld Expires March 15, 2014 [Page 1] Internet-Draft Eurosystem URN Namespace September 2013 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Namespace Considerations . . . . . . . . . . . . . . . . . . . 3 3. Community Considerations . . . . . . . . . . . . . . . . . . . 4 4. Registration Template for the Eurosystem URN Namespace . . . . 4 5. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6. Security Considerations . . . . . . . . . . . . . . . . . . . . 7 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7 7.1. Registration of Formal URN Namespace 'eurosystem' . . . . . 7 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 7 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7 9.1. Normative References . . . . . . . . . . . . . . . . . . . 7 9.2. Informative References . . . . . . . . . . . . . . . . . . 7 Ortseifen & Dickfeld Expires March 15, 2014 [Page 2] Internet-Draft Eurosystem URN Namespace September 2013 1. Introduction The European System of Central Banks (ESCB) is composed of the European Central Bank (ECB) [ECB] and the national central banks (NCBs) of all 27 EU Member States (Article 107.01 of the Treaty) -- whether they have adopted the Euro currency or not. One central bank belonging to the ESCB is Deutsche Bundesbank [DBBK], which, for the purpose of this document, is acting on behalf of the ESCB. The term Eurosystem is used to refer to the entity composed of the ECB and the NCBs of those member states that have adopted the Euro currency. For further information on the tasks of the ESCB and the Eurosystem, please refer to the ECB web site ([ECB], [ESCB], [Eurosystem]). The ESCB provides the market infrastructures TARGET2 (Trans-European Automated Realtime Gross Settlement Express Transfer) system, which is an interbank payment system for the real-time processing of cross- border transfers throughout the European Union. In addition, the ESCB is currently implementing TARGET2-Securities, a future securities settlement platform that offers a new, harmonized and centralized method of settling securities in central bank money. The TARGET2-Securities project was initiated by the Eurosystem as platform-owner in 2006. TARGET2-Securities is currently under development. Four central banks of the Eurosystem - Deutsche Bundesbank, Banque de France, Banca d'Italia and Banco de Espana (4CB) - are entrusted with the development and the operation of the platform. For details, see [T2S_ECB], [T2S_DBBK]. The future users of TARGET2-Securities will communicate and exchange information with the platform via messages (a set of structured information) following the ISO 20022 Standard [ISO20022-RA]. This document specifies and registers with IANA a URN Namespace for the Eurosystem, which will be populated initially by names for abstract and concrete entities used in TARGET2-Securities messaging, but may be used for similar purposes in the future. 2. Namespace Considerations The goal of the requested namespace is to ensure the stability and uniqueness of the names of various items that are used within the messages exchanged between the Eurosystem and the users of TARGET2- Securities (or potentially, other future projects of the Eurosystem). It is essential that names of items (such as the XML schema describing the message itself) can be used to identify the resource even years after the message has been exchanged. This context requires a new namespace owned by, and under the perpetual control of, the Eurosystem. Ortseifen & Dickfeld Expires March 15, 2014 [Page 3] Internet-Draft Eurosystem URN Namespace September 2013 The messaging context of the needed identifiers necessitates the usage of Uniform Resource Identifiers (URIs) as specified in Internet STD 66 [RFC3986]. The persistent identifiers needed are protocol independent resource names -- the same resource may exist in multiple physical locations, and thus be accessible via multiple URLs, but there's the need for a single abstract identifier as a handle (name) for it. Thus, the logical choice for the placement of such namespace is the use of Uniform Resource Names (URNs, as defined by [RFC1737] and [RFC2141]) (and its work-in-progress successor), by specifying a new URN Namespace [RFC3406] for the Eurosystem. 3. Community Considerations The Eurosystem TARGET2-Securities messages are exchanged in IP networks. The message-related resources being persistently named need to be referred to in the public Internet. Therefore, this document specifies a "Formal URN Namespace" using the procedures laid down in RFC 3406 [RFC3406] (and incorporates some of the additional information under discussion for its work-in-progress successor into the registration template below). The requested URN Namespace Identifier (NID) is 'eurosystem'. 4. Registration Template for the Eurosystem URN Namespace The registration template below makes references to Internet STD 66, RFC 3986 [RFC3986]. Namespace ID: eurosystem Scope / kind of named resources: Resources related to Eurosystem messaging. This namespace is reserved to the Eurosystem and its community. Registration Information: - version number: 1 - date: 2013-09-10 Ortseifen & Dickfeld Expires March 15, 2014 [Page 4] Internet-Draft Eurosystem URN Namespace September 2013 Declared registrant of the Namespace: - Registering organization: Name: Deutsche Bundesbank (member of ESCB) Address: Wilhelm-Epstein-Strasse 14 D-60431 Frankfurt Germany URI: http://www.bundesbank.de/ - Designated contact person: Name: Miriam Ortseifen Address: Deutsche Bundesbank Zentrale, T2- und T2S-Service-Management Wilhelm-Epstein-Strasse 14 D-60431 Frankfurt am Main Germany Email: miriam.ortseifen@bundesbank.de Declaration of syntactic structure of NSS part: The structure of the Namespace Specific String is a flat space of printable URI characters (, see RFC 3986), with a preference to short letter-digit-period-hyphen based strings. The NSS has no knowable structure outside of the context of the Eurosystem community internal resolver. Relevant ancillary documentation: None Conformance with URN Syntax: No special consideration. Rules for Lexical Equivalence of NSS part: No special consideration. Usage of query part: There is no support for query instructions or other components of the query part to be used in URI references to 'eurosystem' URNs. Usage of fragment part: The fragment part of URI references to 'eurosystem' URNs has no particular specified utility. Ortseifen & Dickfeld Expires March 15, 2014 [Page 5] Internet-Draft Eurosystem URN Namespace September 2013 Identifier uniqueness considerations: Identifiers are opaquely assigned by Eurosystem URN Registration that guarantees uniqueness. This is simply achieved by reliably keeping track of already assigned names and comparing all new proposed names to the ones already present in the database. If the name already has been assigned, a new one has to be proposed. Identifier persistence considerations: Assigned URNs will not be reused and will remain valid beyond the lifecycle of the referenced resources. However, it should be noted that although the URNs remain valid, the status of the referenced resource may change. Process of identifier assignment: Names are granted by Eurosystem URN Registration via proprietary registration procedures. Future changes to the assignment methods may allow others to assign sub-spaces of the flat namespace, but again, this knowledge is only valid internally and should never be inferred or relied upon externally. Process of identifier resolution: Eurosystem URNs are resolved via URN resolvers run under Eurosystem responsibility. Initially, resolution service will be provided via a web page listing the assigned names and the related metadata of the named resources. Validation mechanism: None specified. 5. Example The following example is listed for pedagogical reasons only; it is not guaranteed to become actually assigned. urn:eurosystem:xsd:reda.012.001.01 Ortseifen & Dickfeld Expires March 15, 2014 [Page 6] Internet-Draft Eurosystem URN Namespace September 2013 6. Security Considerations Since the URNs in this namespace are opaque, there are no additional security considerations other than those normally associated with the use and resolution of URIs and URNs in general (see the Security Considerations in Internet STD 66 [RFC3986], RFC 2141 [RFC2141], and BCP 66 [RFC3406]). It is noted however that attempting to resolve a Eurosystem URN through a resolver other than the one provided by the Eurosystem is error prone. In any case, it is not considered authoritative. 7. IANA Considerations 7.1. Registration of Formal URN Namespace 'eurosystem' IANA maintains the registry of URN Namespaces [IANA-URN]. This document requests amendment of this registry by the registration of a new Formal URN Namespace with the NID 'eurosystem' as per BCP 66 [RFC3406]), using the registration template given above in Section 4. 8. Acknowledgements The authors would like to acknowledge the advice and constructive input received from Subramanian Moonesamy and Alfred Hoenes. 9. References 9.1. Normative References [RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997. [RFC3406] Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom, "Uniform Resource Names (URN) Namespace Definition Mechanisms", BCP 66, RFC 3406, October 2002. [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, January 2005. 9.2. Informative References [DBBK] "Deutsche Bundesbank", . [ECB] "European Central Bank", . [ESCB] The European Central Bank, "ECB, ESCB and the Eurosystem", . Ortseifen & Dickfeld Expires March 15, 2014 [Page 7] Internet-Draft Eurosystem URN Namespace September 2013 [Eurosystem] The European Central Bank, "The Eurosystem - The European System of Central Banks", ISBN 978-928990267-0, . [IANA-URN] IANA, "URN Namespace Registry", . [ISO20022-RA] ISO 20022 Registration Authority, "ISO 20022 - Universal financial industry message scheme", . [RFC1737] Sollins, K. and L. Masinter, "Functional Requirements for Uniform Resource Names", RFC 1737, December 1994. [T2S_DBBK] Deutsche Bundesbank, "TARGET2 Securities", . [T2S_ECB] European Central Bank, "About T2S", . Authors' Addresses Miriam Ortseifen Deutsche Bundesbank Wilhelm-Epstein-Strasse 14 D-60431 Frankfurt Germany Email: iso20022@bundesbank.de Gunnar Dickfeld Deutsche Bundesbank Wilhelm-Epstein-Strasse 14 D-60431 Frankfurt Germany Email: iso20022@bundesbank.de Ortseifen & Dickfeld Expires March 15, 2014 [Page 8]