From: http://www.ietf.org/internet-drafts/draft-snell-atompub-feed-license-07.txt Title: Atom License Extension Reference: IETF Working Group, Internet-Draft 'draft-snell-atompub-feed-license-07.txt' Date: August 15, 2006 I-D Tracker: http://ietfreport.isoc.org/idref/draft-snell-atompub-feed-license/ See also: http://xml.coverpages.org/atom.html Atom Publishing Format and Protocol http://xml.coverpages.org/creativeCommons.html Creative Commons Project ======================================================================== Network Working Group J. Snell Internet-Draft August 15, 2006 Expires: February 16, 2007 Atom License Extension draft-snell-atompub-feed-license-07.txt Status of this Memo 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 becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of 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. 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/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on February 16, 2007. Copyright Notice Copyright (C) The Internet Society (2006). Abstract This memo defines an extension to the Atom Syndication Format for associating licenses with Atom feeds and entries. Snell Expires February 16, 2007 [Page 1] Internet-Draft Feed License August 2006 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Notational Conventions . . . . . . . . . . . . . . . . . . 3 1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The "license" link relation . . . . . . . . . . . . . . . . . . 3 2.1. Example . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Security Considerations . . . . . . . . . . . . . . . . . . . . 5 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5 5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . . 6 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 7 Intellectual Property and Copyright Statements . . . . . . . . . . 8 Snell Expires February 16, 2007 [Page 2] Internet-Draft Feed License August 2006 1. Introduction This document defines how Atom feed publishers can associate licenses with the metadata of a feed or entry. Licenses associated using these mechanisms might 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. 1.1. 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]. 1.2. Terminology The term "link relation" used in this specification refers to the value of the Atom link elements "rel" attribute as defined in section 4.2.7.2 of [RFC4287]. The term "entry content" refers to the value of the content element as defined in section 4.13 of [RFC4287] and to any resources identified by the content element "src" attribute. For feed elements, the term "metadata" refers to the values and attributes of the author, category, contributor, generator, icon, id, link, logo, rights, subtitle, title, and updated elements (as defined by [RFC4287]), as well as all extension elements appearing as children of the feed element and all elements appearing as children of the author and contributor elements. It also includes the selection and arrangement of entry elements contained by the feed but not the metadata or content of the entries themselves. For entry elements, "metadata" refers to the values and attributes of the author, category, content, contributor, id, link, published, rights, source, summary, title, and updated elements, as well as all extension elements appearing as children of the entry element and all elements appearing as children of the author and contributor elements. 2. The "license" link relation The "license" link relation associates a license with a feed or entry. Feed and entry elements MAY contain any number of "license" link relations but MUST NOT contain more than one with the same Snell Expires February 16, 2007 [Page 3] Internet-Draft Feed License August 2006 combination of href and type attribute values. The IRI specified by the link's 'href' attribute SHOULD be dereferenceable to return a representation of the license. The license representation MAY be machine readable. Multiple "license" link relations specifying different href attribute values are are considered to be mutually exclusive alternatives. For instance, if an entry specifies both a Creative Commons License and the General Public License (GPL), the entry is considered to be licensed as either Creative Commons OR GPL as opposed to Creative Commons AND GPL. If multiple license link relations are specified, each SHOULD contain a title attribute specifying a human-readable label for the license. Because entries contained within a feed may originate from other sources, "license" link relations appearing within a feed apply to the metadata of the containing feed element only and do not extend over the metadata or content of the contained entries. Entry content might include or reference material from other sources. Licenses associated with an entry MUST NOT be assumed to cover such material. Implementations cannot necessarily trust that publishers have the right to license material claimed to be covered by any associated license. Care should be taken when making decisions based on the referenced license. Snell Expires February 16, 2007 [Page 4] Internet-Draft Feed License August 2006 2.1. Example http://www.example.com/myfeed My Example Feed 2005-07-28T12:00:00Z Copyright (c) 2005. Some rights reserved. This feed is licensed under a Creative Commons Attribute-NonCommercial Use License. It contains material originally published by Jane Smith at http://www.example.com/entries/1 under the Creative Commons Attribute License. James tag:entries.org,2005:1 Atom Powered Robots Run Amok 2005-06-28T12:00:00Z Atom Powered Robots Run Amok Jane Smith 3. Security Considerations When "license" link relations are used in Atom documents, the security considerations for handling links in Atom documents apply. 4. 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]. Attribute Value: license Description: Specifies the IRI of a license associated with the containing feed, entryor source element. Expected display characteristics: None Security considerations: When "license" link relations are used in Atom documents, the security considerations for handling links in Atom documents apply. Snell Expires February 16, 2007 [Page 5] Internet-Draft Feed License August 2006 5. References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC4287] Nottingham, M., Ed. and R. Sayre, Ed., "The Atom Syndication Format", RFC 4287, December 2005. Appendix A. Acknowledgements The author gratefully acknowledges the feedback from Mike Linksvayer, Robin Cover, Lisa Dussealt, Bjorn Hohrmann, Frank Ellermann, and the members of Atom Publishing Format and Protocol working group during the development of this specification. Snell Expires February 16, 2007 [Page 6] Internet-Draft Feed License August 2006 Author's Address James M Snell Phone: Email: jasnell@gmail.com URI: http://www.snellspace.com Snell Expires February 16, 2007 [Page 7] Internet-Draft Feed License August 2006 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. Snell Expires February 16, 2007 [Page 8]