Internet Engineering Task Force (IETF)
Request for Comments: 5791
Category: Informational
ISSN: 2070-1721
J. Reschke
J. Kunze
University of California
February 2010

RFC 2731 ("Encoding Dublin Core Metadata in HTML") Is Obsolete


This document obsoletes RFC 2731, "Encoding Dublin Core Metadata in HTML", as further development of this specification has moved to the Dublin Core Metadata Initiative (DCMI).

Status of This Memo

This document is not an Internet Standards Track specification; it is published for informational purposes.

This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741.

Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at

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Copyright © 2010 IETF Trust and the persons identified as the document authors. All rights reserved.

This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents ( in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.

1. Introduction

   [RFC2731] defines "Encoding Dublin Core Metadata in HTML".  Newer
   specifications published by the Dublin Core Metadata Initiative
   ( over the last decade, in particular
   "Expressing Dublin Core metadata using HTML/XHTML meta and link
   elements" ([DC-HTML]), have obsoleted this work.

Note: Implementers of RFC 2731 should note that DC-HTML introduces a new requirement with respect to the use of the "head" element's "profile" attribute.

2. Security Considerations

This document is of administrative nature only and therefore there are no security relations related to it.

3. Normative References

   [DC-HTML]  Johnston, P. and A. Powell, "Expressing Dublin Core
              metadata using HTML/XHTML meta and link elements", Dublin
              Core Metadata Initiative , August 2008,
   [RFC2731]  Kunze, J., "Encoding Dublin Core Metadata in HTML",
              RFC 2731, December 1999.

Authors' Addresses

   Julian F. Reschke
   greenbytes GmbH
   Hafenweg 16
   Muenster, NW  48155
   John A. Kunze
   University of California
   Office of the President
   415 20th Street, #406
   Oakland, CA  94612-3550