WDIFF

draft-sangug-uci-urn-02.txt --> rfc4179.txt

Network Working Group Sang-ug S. Kang
Internet-Draft
Request for Comments: 4179 National Computerization Agency
Expires: July 1, 2005 March
Category: Informational October 2005

Using Universal Content Identifier (UCI)
as Uniform Resource Names
draft-sangug-uci-urn-02.txt (URN)

Status of this This Memo

This document is an Internet-Draft and is subject to all provisions
of section 3 of RFC 3667. By submitting this Internet-Draft, each
author represents that any applicable patent or other IPR claims of
which he or she is aware have been or will be disclosed, and any of
which he or she become aware will be disclosed, in accordance with
RFC 3668.

Internet-Drafts are working documents of memo provides information for the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as
Internet-Drafts.

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. community. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."

The list of current Internet-Drafts can be accessed at
http://www.ietf.org/1id-abstracts.html

The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html"

This Internet-Draft will expire on July 1, 2005.

Intellectual Property Rights (IPR) Statement

By submitting this Internet-Draft, I certify that any applicable
patent or other IPR claims does
not specify an Internet standard of which I am aware have been disclosed, or
will be disclosed, and any kind. Distribution of which I become aware will be disclosed,
in accordance with RFC 3668. this
memo is unlimited.

Abstract

This document describes a Uniform Resource Name (URN) namespace for
the National Computerization Agency (NCA) for naming persistent
digital resources such as musics, music, videos, texts, images, e-books e-books, and
other types of digital resources produced or managed by NCA.

Sang-ug Expires July 1, 2005 [Page 1]

Internet-Draft URN Namespace for UCI Feburuary 2005

1. Introduction

NCA is a non-profit organization with a mandate to develop and
promote information infrastructure and manage public digital contents
in Korea and possibly worldwide.

NCA has been supervising digitalization projects with various
organizations. The contents involved in such projects include
millions of technical papers, cultural properties, educational
materials, scientific research reports. Those organizations manage
the digital contents in a standardized way set by NCA and provide
users with various content services via internet.

NCA wishes to issue globally unique and persistent IDs to digital
resources and assign relevant organizations as its registration
agencies under the Universal Content Identifier (UCI) scheme. It is
beneficial for NCA, its registration agencies, and the value chain
players in e-commerce, to have the UCI URN namespace, under which all
the contents and components NCA produces produced and manages managed by NCA are digitally
registered, identified identified, and resolved.

NCA has been developing and operating the UCI system that provides
registration, resolution, search, and administration functionalities.

Kang Informational [Page 1]

RFC 4179 URN Namespace for UCI October 2005

The functionalities are going to be added and modified once the use
of UCI URN namespace is approved. NCA would like to assign unique,
permanent, and location-independent names based on the URNs for the
resources it produces or manages. See
http://www.nca.or.kr/eindex.htm for more information on NCA.

This namespace specification is for a formal namespace.

2. Specification Template

Namespace ID:

"UCI"

Registration Information:

Registration Version Number: 1 Registration Date: 2004-07-xx

Declared registrant of the namespace:

Name : Sang-ug Kang
Affiliation: National Computerization Agency
Address : NCA Bldg. 77 Mookyo-Dong, Chung-Ku, Seoul, Korea
Phone : +82 (2) 2131-0443
Email : <sukang@nca.or.kr>
Web : <http://www.nca.or.kr> or <http://home.uci.or.kr>

Sang-ug Expires July 1, 2005 [Page 2]

Expires: July 1, 2005 Feburuary 2005

Declaration of syntactic structure:

The Namespace specific string of all URNs assigned by NCA conforms
to the syntax defined in section 2.2. of RFC2141, "URN Syntax"[1].
The syntax convention is described in the form of ABNF rules [2]
as the following.

UCI = prefix "-" instance *1(":" qualifier)

prefix = 1*(alphaDigit) *1(":" 1*(alphaDigit))
*1("+" 1*(alphaDigit))
instance = 1*(trans / "%" HEXDIG HEXDIG)
qualifier = head 1*(alphaDigit) *2("-" head 1*(alphaDigit))
trans = alphaDigit / other
alphaDigit = ALPHA / DIGIT
head = "C" / "R" / "F"
other = "(" / ")" / "+" / "," / "-" / "." / "=" / "@" /
";" / "$" / "_" / "!" / "*" / "'"

Kang Informational [Page 2]

RFC 4179 URN Namespace for UCI October 2005

The UCI identifier consists of two parts : parts: prefix code and content
code. The content code is also divided into instance code and
qualifier code code, which is optional. A prefix code is given to a
registration agency, subordinate registration agency, and/or its
registrants such as 'G3000+music', 'I600', 'I500+paper' 'I500+paper', and so
forth. A content code is issued to each individual digital
resource such as 'cii90007', '8987409' '8987409', and so on.

Relevant ancillary documentation:

None.

Identifier uniqueness considerations:

It is the responsibility of the registration authority, or NCA, to
guarantee the uniqueness of identifiers and the names of
subordinate naming authorities. For example, a software tool
developed and used by NCA checks if a UCI identifier is being
reassigned and verifies that it is assigned to at most one resource,
resource during the registration process.

Identifier persistence considerations:

Registration Agencies are all eligible to maintain the usability
of the UCI URNs for a reasonably long period. As a government
sponsored organization, NCA will operate a backup service and make
an effort to find a substitute in case a registration agency
becomes out of operation.

Sang-ug Expires July 1, 2005 [Page 3]

Expires: July 1, 2005 Feburuary 2005

Process of identifier assignment:

Assignment of UCI identifier is delegated to the registration
agencies. NCA appoints UCI registration agencies and provides its
namespace by assigning a unique registration agency code which that is a
part of NSS. Followed by the authorized namespace, each
registration agency sets its own identifier scheme that conforms
to the UCI syntactic structure.

A UCI for a digital resource is issued by the registration agency,
upon a request of a regitrant. registrant. The following is an example
identifier.

e.g., urn:uci:I700-2987098

where, I700 is a registration agency code and 2987098 is an
identifier assigned to a digital content.

Kang Informational [Page 3]

RFC 4179 URN Namespace for UCI October 2005

Process for identifier resolution:

Resolution is controlled by NCA and its delegatees. The list of
UCI registration agency codes is maintained by the regitration registration
authority. Each registration agency maintains the list of
subordinate registrant codes and identifiers registered to the
registration agency.

Identifier resolution steps are as follows.

- (Step1)Global resolution : (Step1) Global resolution: NCA resolves which RA is dealing with
the associated resource by parsing the registration agency code
of the UCI.
- (Step2) Local resolution : resolution: The corresponding RA parses and
resolves the rest of the identifier

The global resolution is performed by UCI resolution server that
is open to public. (Currently http://rootadmin.uci.or.kr:9000/
{UCI identifier} will give you resolution results.)

Rules for Lexical Equivalence:

The "prefix" is case-insensitive. So there will not be two
registration agencies whose names differ only in case.

urn:uci:{prefix code}:

is case-insensitive for matches. Remainder of the identifier is
case-sensitive.

Sang-ug Expires July 1, 2005 [Page 4]

Expires: July 1, 2005 Feburuary 2005

Conformance with URN Syntax:

The UCI syntax fully conforms to RFC2141 syntax rules for both NSS
and NID.

Validation mechanism:

Valid list of prefix code will be available via both on-line and
off-line upon request. The validity of the rest of identifier can
be offered via on-line service. (Currently at http://rootadmin.
uci.or.kr:9000/{UCI identifier} by typing a query UCI identifier)

Scope:

Global.

Kang Informational [Page 4]

RFC 4179 URN Namespace for UCI October 2005

3. Security Considerations

There are no additional security considerations beyond those normally
associated with the use and resolution of URNs in general.

4. Namespace Considerations

The Korean government has been funding the UCI project with the
vision that it will be an essential component in realizing
interoperability of digital contents owned by individual institutes
and organizations. The resolution service provided by NCA and its
registration agencies via networks will play a central role in
achieving such a goal. Moreover, the resolution service is open to
the public without discrimination.

The assignment and use of identifiers is performed according to the
rules established by NCA. It abides by the URN requirements and
syntax. Within a UCI namespace, a registration agency manages
subordinate namespaces and maintains the metadata of digital
contents.

For making the service available to the public, a global resolution
service is run by NCA through a service server and local resolution
service is provided by the corresponding registration agency.

5. Community Considerations

The assignment and use of identifiers within the namespace are open open,
and the related rule is established by NCA. Registration agencies
are evaluated and selected fairly and shall have the responsibility
for
of processing registrant's registrants' requests for registering digital contents.
Registration authority and registration agencies shall operate
resolution servers for UCI namespace and subordinate

Sang-ug Expires July 1, 2005 [Page 5]

Expires: July 1, 2005 Feburuary 2005 namespaces,
respectively. Digital content users can access to the resolution
servers to fetch resolution results. The reference software is developed
developed, and resolution servers are now in operation.

6. IANA Considerations

This document requests the registration of

The IANA has registered the "UCI" namespace in the IANA registry of
URN NIDs. For more information about URN namespace, see [3].

Kang Informational [Page 5]

RFC 4179 URN Namespace for UCI October 2005

7. Normative References

[1] Moats, R., "URN Syntax", RFC 2141, May 1997.

[2] Crocker, D. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, November 1997.

[3] Daigle, L., van Gulik, D., Iannella, R. R., and P. Faltstrom, "URN
"Uniform Resource Names (URN) Namespace Definition Mechanisms",
BCP 33, 66, RFC 2611, June 1999.

8. Authors' Addresses

Kang, 3406, October 2002.

Author's Address

Sang-ug
NCA Kang
National Computerization Agency
Bldg. 77 Mookyo-Dong,
Joong-Ku, Seoul,
Korea

Phone: 82-2-2131-0443
EMail: sukang@nca.or.kr

Kang Informational [Page 6]

RFC 4179 URN Namespace for UCI October 2005

Full Copyright Statement

This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.

This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.

Sang-ug Expires July 1, 2005 [Page 6]

Expires: July 1, 2005 Feburuary 2005

The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assignees.

This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Intellectual Property

The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.

Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.

The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf-
ipr@ietf.org.

Acknowledgement

Funding for the RFC Editor function is currently provided by the
Internet Society.

Kang Informational [Page 7]

----