My .02, FWIW, and off the top of my head;

I think this is a well-intentioned effort, but at the wrong end of the process. The market (i.e., users and implementors) should have a go at sorting out at what's common/prevalent enough to merit this sort of thing; having a co-ordinated namespace will lead to the problem of what to lump into it, how to version individual extensions within it, etc.

In other words, some of the benefits of Namespaces in XML -- e.g., loose coordination, well-insulated name spaces, ability to change namespace without changing local name to effect versioning -- will be lost, all for the sake of saving a few characters. Not worth it, IMO.

A much better thing would be to wait a year or two and see if there's a need for such a beast.

And, the idea of an XML namespace backed by an IANA registry is a little bit twisted, considering the W3C and IETF's philosophies about these things ;)

Cheers,


On 01/10/2005, at 10:54 PM, James M Snell wrote:


As I've been going through the effort of defining a number of Atom extensions, I've consistently come back to the thought that it would be interesting to explore the creation of a "Common Extensions Namespace" under which multiple standardized extensions can be grouped. I've written an initial draft of the concept but before I submit it as an Internet Draft, I'd like to get some feedback from the group. Please review the attached and let me know what you think.

- James



Network Working Group J. Snell Internet-Draft September 2005
Expires: March 5, 2006


                    Atom Common Extensions Namespace
                     draft-snell-atompub-ace-00.txt

Status of this Memo

   By submitting this Internet-Draft, each author represents that any
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   This Internet-Draft will expire on March 5, 2006.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document introduces a common namespace for standardized
   extensions to the Atom 1.0 Syndication Format.










Snell Expires March 5, 2006 [Page 1] Internet-Draft A.C.E. September 2005


Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Notational Conventions . . . . . . . . . . . . . . . . . . . . 3 3. The Atom Common Extensions Namespace . . . . . . . . . . . . . 3 4. Registry of Atom Common Extensions . . . . . . . . . . . . . . 3 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Author's Address . . . . . . . . . . . . . . . . . . . . . . . 4 A. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4 Intellectual Property and Copyright Statements . . . . . . . . 5







































Snell Expires March 5, 2006 [Page 2] Internet-Draft A.C.E. September 2005


1.  Introduction

   The Atom Common Extensions Namespace is a single XML Namespace with
   which standardized Atom 1.0 extensions MAY be associated.  This
document defines the common namespace and creates an IANA Registry of
   Atom Common Extensions.

2.  Notational Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, [RFC2119], as
   scoped to those conformance targets.

3.  The Atom Common Extensions Namespace

The Atom Common Extensions Namespace is an expansion of the Atom 1.0
   Syndication Format XML Namespace.  XML elements and attributes
defined as Atom 1.0 Extensions that are standardized in accordance to
   the process specified in "Section 4: Registry of Atom Common
   Extensions" MAY use the Atom Common Extensions Namespace as an
alternative to defining their own extension specific XML namespaces.

   The Atom Common Extensions Namespace
     "http://www.w3.org/2005/Atom/ace";

4.  Registry of Atom Common Extensions

   This specification defines a Registry of Atom Common Extensions
maintained by IANA. The members of the Registry consist of Atom 1.0 Extensions that define XML elements and attributes falling under the the Atom Common Extensions Namespace. New assignments are subject to
   IESG approval as outlined in [RFC2334].  Requests should be made by
   email to IANA, which will then forward the request to the IESG
requesting approval. The request should use the following template:

   o  Name: (A unique informal name by which the extension can be
      referred.)
   o  Description:
o Elements and Attributes: (definitions for each of the XML elements
      and attributes to be associated with the Atom Common Extensions
      Namespace)
   o  Security Considerations:

   Extension elements and attributes introduced by new assignments to
the registry MUST be uniquely named within the Atom Common Extensions
   Namespace and MUST NOT duplicate the function and purpose of other
   elements and attributes specified by other extensions in the



Snell Expires March 5, 2006 [Page 3] Internet-Draft A.C.E. September 2005


   registry.

5.  Security Considerations

   There are no security considerations introduced by this
   specification.

6.  IANA Considerations

   This specification creates a Registry of Atom Common Extensions as
   described in section 4.

7.  References

   [I-D.ietf-atompub-format]
              Sayre, R. and M. Nottingham, "The Atom Syndication
Format", draft-ietf-atompub-format-11 (work in progress),
              August 2005.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

[RFC2334] Luciani, J., Armitage, G., Halpern, J., and N. Doraswamy, "Server Cache Synchronization Protocol (SCSP)", RFC 2334,
              April 1998.

   [W3C.REC-xml-infoset-20040204]
              Tobin, R. and J. Cowan, "XML Information Set (Second
              Edition)", W3C REC REC-xml-infoset-20040204,
              February 2004.

   [W3C.REC-xml-names-19990114]
              Hollander, D., Bray, T., and A. Layman, "Namespaces in
              XML", W3C REC REC-xml-names-19990114, January 1999.


Author's Address

   James M Snell


   Phone:
   Email: [EMAIL PROTECTED]
   URI:   http://snellspace.com

Appendix A.  Acknowledgements

   TBD



Snell Expires March 5, 2006 [Page 4] Internet-Draft A.C.E. September 2005


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Snell Expires March 5, 2006 [Page 5]




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