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RE: "Status of I-D Submission: draft-evain-ebu-urn-01.txt" - Request for publication as 'informational'
Dear Leslie,
Thanks for the comments. Does the attached document address your concerns?
If not, please do not hesitate to let me know.
Best regards,
Jean-Pierre
-----Original Message-----
From: Leslie Daigle [mailto:leslie at thinkingcat.com]
Sent: mercredi, 9. janvier 2008 19:23
To: Evain, Jean-Pierre
Cc: urn-nid at apps.ietf.org; Lisa Dusseault
Subject: Re: "Status of I-D Submission: draft-evain-ebu-urn-01.txt" -
Request for publication as 'informational'
Hi,
Sorry, I thought I had sent this some time ago, but it seems
not to have gone out. Looking back in my archive, I think
I confused myself because of structural similarities
to the DVB document (which had the same issue, noted
below). Consider these now comments on the
-02 document.
The Namespace Considerations should have sentences that explain why no
existing URN namespace is adequate, and a new formal NID should be assigned.
Per RFC3406, the specific requirement of this section is:
" [...] a "Namespace Considerations" section, which
outlines the perceived need for a new namespace (i.e., where existing
namespaces fall short of the proposer's requirements).
"
The current document does not make a clear statement as
to why a new namespace is needed.
Check out the first para in that section of the updated
DVB document draft-adolf-dvb-urn (-03 as of this moment).
Also, this document shares an issue that was flagged in
the DVB document in last call. Your document says:
" Identifier uniqueness considerations:
The EBU will establish unique identifiers as appropriate.
Uniqueness is guaranteed as long as the assigned string is never
reassigned.
"
The second sentence is tautologically true. If what you
mean is that you will ensure an assignment process such
that they don't get reassigned, you must say that.
Similarly,
" Identifier persistence considerations:
The European Broadcasting Union (EBU) is committed to maintaining
the accessibility and persistence of all resources that are
officially assigned URNs by the organization. Persistence of
identifiers is dependent upon suitable delegation at the level of
"{category}"s, and persistence of category assignment."
If the intention is to ensure that {category}s are suitably delegated and
persistent, through EBU control of assignment, you should say that.
Thanks,
Leslie.
Evain, Jean-Pierre wrote:
> Dear urn-nid editor,
>
> please find attached the draft-evain-ebu-urn-01.txt for which I have
> requested publication as 'informational.
>
> Draft ID
> reference: http://www.ietf.org/internet-drafts/draft-evain-ebu-urn-01.txt.
>
> Thanks in advance,
>
> Best regards,
>
> Jean-Pierre Evain
>
> ----------------------------------------------------------------------
> --
>
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--
-------------------------------------------------------------------
"Reality:
Yours to discover."
-- ThinkingCat
Leslie Daigle
leslie at thinkingcat.com
-------------------------------------------------------------------
Internet Draft J-P. Evain
<draft-evain-ebu-urn-03.txt> EBU URN Scheme
Category: Informational EBU
Expires July 2008 January 17, 2008
A Uniform Resource Name (URN) Namespace for
the European Broadcasting Union (EBU)
<draft-evain-ebu-urn-03.txt>
Status of this Memo
Distribution of this memo is unlimited.
By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware
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Abstract
This document describes a Uniform Resource Name (URN) namespace for
the European Broadcasting Union (EBU) for naming persistent
resources defined within EBU technical documentation and Internet
resources. Example resources include technical documents and
specifications, eXtensible Markup Language(XML) Schemas,
classification schemes, XML Document Type Definitions (DTDs),
namespaces, style sheets, media assets, and other types of resources
produced or managed by the EBU.
evain Expires July 17, 2008 [Page 1]
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Table of Contents
1. Introduction ....................................................2
2. Specification Template ..........................................2
3. Examples ........................................................6
4. Namespace Considerations ........................................6
5. Community Considerations ........................................7
6. Security Considerations .........................................7
7. IANA Considerations .............................................8
8. References ......................................................8
9. Copyright Notice.................................................9
10. Intellectual Property...........................................10
1. Introduction
The European Broadcasting Union (EBU) is the largest non-for profit
professional association of broadcasters worldwide established
since 1950. The Union has more than 70 active members in 55
countries in Europe, North Africa and the Middle East, and more
than 40 associate members in 25 countries further afield. The
EBU negotiates broadcasting rights for major sport events, operates
the Eurovision and Euroradio networks, organises programme exchanges
and co-productions, and provides other operational, and legal
support. It provides technical advice to its members and favours the
adoption of standardised solutions in broadcast systems from content
ingest to end-user delivery. EBU activities cover traditional
broadcast and new delivery medias such as the Internet for which a
growing number or resources are being developped.
The EBU would like to assign unique, permanent, location-independent
names based on URNs for some resources it produces or manages.
This namespace specification is for a formal namespace.
2. Specification Template
Namespace ID:
"ebu"
Registration Information:
Version: 1
Date: 2007-02-20
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Internet Draft EBU URN January 17, 2008
Declared registrant of the namespace:
Name: Jean-Pierre Evain
Title: Senior Engineer
Affiliation: European Broadcasting Union (EBU)
Address: Ancienne Route 17a
CH-1218 Geneva
SWITZERLAND
Phone: +41 22 717 2734
Email: evain at ebu.ch
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Declaration of structure:
URNs assigned by the EBU will have the following hierarchical
structure based on the organisational structure of the EBU
resources:
urn:ebu:{category}:{string}
where "{category}" is a US-ASCII string that conforms to the
syntax of the <NID>, and "{string}" is a US-ASCII string that
conforms to the syntax of the <NSS> ([RFC2141]).
The individual URNs will be assigned by the EBU through the
development process of EBU resources.
Relevant ancillary documentation:
More information on the EBU and relevant technical activities can
be found at ([http://www.ebu.ch/metadata]).
Identifier and namespace uniqueness considerations:
The EBU will establish unique identifiers as appropriate and
ensure that a process is put in place to prevent re-assignation of
existing identifiers and namespaces
Identifier and namespace persistence considerations:
The European Broadcasting Union (EBU) shall ensure the
accessibility and persistence of all resources that are
officially assigned URNs by the organization, in particular upon
suitable delegation at the level of "{category}"s, and persistence
of category assignment.
Process of identifier and namespace assignment:
The assignment of identifiers and namespaces is fully controlled
and managed by the European Broadcasting Union (EBU).
evain Expires July 17, 2008 [Page 4]
Internet Draft EBU URN January 17, 2008
Process of identifier resolution:
The owner will develop and maintain "URN catalogues" that map all
assigned URNs to Uniform Resource Locators (URLs) specifically to
enable Web-based resolution of named resources. In the future an
interactive online resolution system may be developed to automate
this process.
The owner will authorize additional resolution services as
appropriate.
Rules for Lexical Equivalence:
The "{category}" is case-insensitive. Thus, the portion of the
URN:
urn:ebu:{category}:
is case-insensitive for matches up to {category}. The remainder
of the identifier shall be considered case-sensitive; hence, URNs
are only lexically equivalent if they are also lexically
identical in the remaining "{string}" field.
Conformance with URN Syntax:
No special considerations.
Validation mechanism:
The owner will develop and maintain URN
catalogues. The presence of a URN in a catalogue indicates that
it is valid. Validation shall more particularly be done by a
syntax grammar corresponding to each "{category}".
Scope:
Global
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3. Examples
The following examples are not guaranteed to be real. They are
presented for pedagogical reasons only.
urn:ebu:metadata:pmeta_2007
urn:ebu:metadata-cs:EscortCS_2007
4. Namespace Considerations
The EBU develops and maintains metadata schemas and classification
schemes, which are made publicly available from
http://www.ebu.ch/metadata for integration or cross reference in
third party implementations, technical specifications and standards.
Reference to the urn:ebu namespace shall be a guarantee of open
access and quality.
Furthermore, the value of well defined namespaces in fully recognised
including for versioning purposes, which will be facilitated through
the EBU maintenance of its own namespace dictated by the following
rules.
URN assignment procedures:
The individual URNs shall be assigned through the process of
development of EBU resources by the European Broadcasting Union
(EBU).
URN resolution/delegation:
The resolution and delegation shall be determined through the
process of development of EBU resources by the European
Broadcasting Union (EBU).
Type of resources to be identified:
Types of resources to be identified include XML schema definition
files, classification schemes and identification systems.
Type of services to be supported:
Types of services supported include controlled term lookup in
classification schemes, resolution of ids in identification
systems.
evain Expires July 17, 2008 [Page 6]
Internet Draft EBU URN January 17, 2008
5. Community Considerations
The EBU traditionally addresses the broadcasting community but its
resources are made available to all interested parties.
Communities involved in offering content over new IP-based delivery
medias such as via the Internet and mobile communication networks, or
using IP infrastructures and Service Oriented Architectures are
welcome to use EBU resources. Metadata and content identifiers, for
which the EBU mainly needs the urn:ebu namespace plays a key role in
content search and retrieval, end-to-end from content commissoning to
user delivery.
Web services, search engines, the semantic web are among the core
technologies that the EBU is now exploiting to access users in a
multi-media multi-platform connected world.
Potential beneficiary developing communities include:
a) Implementers and users of EBU resources.
Resources that comply with EBU specifications
(including schemas, instance documents that comply with
EBU schemas, and the EBU default Classification Schemes)
may, by means of the registered namespace, become exposed to
the general Internet and gain from the interoperability
benefits of the Internet at large.
b) Implementers of other specifications that incorporate part or
all of available EBU resources.
URNs used to identify EBU resources may be used to enable
their inclusion in, and enhancement of, other specifications
while maintaining, to a certain degree, interoperability with
the EBU (see a) above).
c) Implementers of other semantically related specifications that
do not directly incorporate part or all of EBU resources.
URNs used to identify EBU resources, such as identifiers of
terms within default Classification Schemes, may enable
interoperation with other semantically determined
specifications (including present and future metadata/resource
description and ontology specifications) of relevance to EBU
implementation communities (see a) and b) above).
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6. Security Considerations
The portion of the URN, urn:ebu:{category}:, is case-insensitive for
matches up to {category}.
Otherwsie, There are no additional security considerations other than
those normally associated with the use and resolution of URNs in
general.
7. IANA Considerations
The IANA has registered formal URN namespace 'ebu', to the EBU within
the IANA registry of URN NIDs, according to the registration template
in Section 2.
8. References
8.1. Normative References
[RFC2141] Moats, R., "URN Syntax", May 1997.
Authors' Addresses
Jean-Pierre Evain
European Broadcasting Union
Technical Department
L'ancienne route 17A
CH-1218 Grand-Saconnex (GE)
SWITZERLAND
Tel: +41 22 717 2734
Fax: +41 22 74 74 734
Email: evain at ebu.ch
evain Expires July 17, 2008 [Page 8]
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evain Expires July 17, 2008 [Page 9]