Network Working Group                                           J. Snell
Internet-Draft                                          January 25, 2006
Expires: July 29, 2006


                       Feed License Link Relation
                draft-snell-atompub-feed-license-05.txt

Status of this Memo

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   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 becomes
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   This Internet-Draft will expire on July 29, 2006.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This memo presents a mechanism that allows feed publishers to
   associate copyright licenses with feeds and entries.










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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Notational Conventions  . . . . . . . . . . . . . . . . . . . . 3
   3.  The 'license' link relation . . . . . . . . . . . . . . . . . . 3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 5
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . . . 5
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . . . 6
   Intellectual Property and Copyright Statements  . . . . . . . . . . 7








































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.  Introduction

   This document defines how Atom feed publishers can associate
   copyright licenses with the informational content of an entry.
   Licenses associated using these mechanisms MAY or MAY not be machine
   readable and are intended to communicate the various rights and
   obligations others may have with regards to the associated Atom Feed
   or Entry.


.  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].

   In this specification, "link" refers to the atom:link element.

   In this specification, "link relation" refers to the value of the
   atom:link element's rel attribute.


.  The 'license' link relation

   The 'license' link relation is used to associate a copyright license
   with an Atom Feed or Entry.

   Atom entry, feed and source elements MAY each contain any number of
   license link relations.  Each element MUST NOT contain more than one
   license link relation with the same href value.

   License link relations apply only to the informational content of the
   containing element.  That is, the presence of a license link relation
   contained by an atom:feed element does not extend a license over the
   various contained entry elements.  Likewise, the presence of a
   license link relation contained by an atom:source element does not
   extend a license over the informational content of the containing
   atom:entry.













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   For example

     <feed xmlns="http://www.w3.org/2005/Atom">
       <id>http://www.example.com/myfeed</id>
       <title>My Example Feed</title>
       <updated>2005-07-28T12:00:00Z</updated>
       <link href="http://www.example.com/myfeed" />
       <link rel="license"
             type="text/html"
             href="http://creativecommons.org/licenses/by/2.5/" />
       <author><name>James</name></author>
       <entry>
         <id>tag:entries.com,2005:1</td>
         <title>My original entry</title>
         <link href="http://www.example.com/entries/1" />
         <summary>This is my original entry</summary>
         <link rel="license"
               type="text/html"
               href="http://creativecommons.org/licenses/by/2.5/" />
       </entry>
     </feed>

   Multiple license link relations appearing within an element indicates
   that the informational content has been published under multiple
   copright licenses.  In such instances, each of the linked licenses is
   considered a mutually exclusive alternative to the others.  That is
   to say, for example, if an entry contains license links to both a
   Creative Commons License and the General Public License (GPL), the
   informational content is considered to be licensed either as
   "Creative Commons OR GPL" as opposed to "Creative Commons AND GPL".
   If multiple license link relations are specified, each SHOULD contain
   a title attribute that specifies a human readable label for each
   license link.


.  Security Considerations

   As an extension of the Atom Syndication Format, the license link
   relation is subject to the same security considerations described in
   section 8 of [RFC4287].


.  IANA Considerations

   This specification defines one new Atom link relation type to be
   registered in the IANA Registry of Link Relations as defined by
   [RFC4287].




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       Attribute Value: license
       Description: (see section 3)
       Expected display characteristics: (see section 3)
       Security considerations: (see section 4)

.  References

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

   [RFC4287]  Nottingham, M. and R. Sayre, "The Atom Syndication
              Format", RFC 4287, December 2005.


Appendix A.  Acknowledgements

   The author gratefully acknowledges the feedback from Mike Linksvayer,
   Robin Cover, and the members of Atom Publishing Format and Protocol
   working group during the development of this specification.
































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Author's Address

   James M Snell


   Phone:
   Email: jasnell@gmail.com
   URI:   http://snellspace.com











































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Intellectual Property Statement

   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.


Disclaimer of Validity

   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.


Copyright Statement

   Copyright (C) The Internet Society (2006).  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.


Acknowledgment

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




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