HTTP/2 200 date: Thu, 09 Oct 2025 22:56:48 GMT content-type: text/html; charset=utf-8 content-encoding: gzip content-location: Atom.html vary: negotiate,Accept-Encoding tcn: choice last-modified: Thu, 17 Feb 2022 20:52:36 GMT cache-control: max-age=21600 expires: Fri, 10 Oct 2025 04:56:48 GMT x-backend: www-mirrors x-request-id: 98c1792b2eb9c462 strict-transport-security: max-age=15552000; includeSubdomains; preload content-security-policy: frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests cf-cache-status: BYPASS set-cookie: __cf_bm=jKHcAY7cPLkAt4aZOV_BWQGXjib7wTPjwLmFnShld6E-1760050608-1.0.1.1-YfwnZUthaXgA8djUhZb_4DWbBAJGGd_9cYqmdWUuTlpRVA._LYV4EBfyrQUzMD.iryaTH7sxUQH3WqY1egmAhj3e.Ymz2hjZ0mc_zF4P78w; path=/; expires=Thu, 09-Oct-25 23:26:48 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None server: cloudflare cf-ray: 98c1792b2eb9c462-BLR alt-svc: h3=":443"; ma=86400

Atom Syndication Format namespace

The namespace name https://www.w3.org/2005/Atom is intended for use as per The Atom Syndication Format, a December 2005 Proposed Standard developed by the IETF atompub Working Group.

According to the The Internet Standards Process -- Revision 3,

A Proposed Standard specification is generally stable, has resolved known design choices, is believed to be well-understood, has received significant community review, and appears to enjoy enough community interest to be considered valuable. However, further experience might result in a change or even retraction of the specification before it advances.

See also URIs for W3C Namespaces. For more information about XML namespaces, please refer to Namespaces in XML.

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issued 7 Jul 2005 by Dan Connolly, W3C/IETF liaison on behalf of the W3C Director to
Tim Bray and Paul Hoffman atompub WG chairs
$Revision: 1.11 $ of $Date: 2022/02/17 20:52:36 $