HTTP/2 200 date: Tue, 07 Oct 2025 15:34:08 GMT content-type: text/html; charset=iso-8859-1 content-encoding: gzip content-location: xup.html vary: negotiate,Accept-Encoding tcn: choice last-modified: Tue, 28 May 2002 20:25:16 GMT cache-control: max-age=21600 expires: Tue, 07 Oct 2025 21:34:08 GMT x-backend: www-mirrors x-request-id: 98ae75fa89eee8e0 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=Jim34gNIQU2jthnVau_6prFGi4PDuSL.NAiaj3A285g-1759851248-1.0.1.1-C6MGUikPJvQ1h9WDQp0liMlobwi19ovF2TRxjoCxIfYes7TEU.9pwY.j0nt34cMfCizHKJ4hov_Jw4BEhzIJrUQnDFnTb3AZNl4DMJ.jp5k; path=/; expires=Tue, 07-Oct-25 16:04:08 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None server: cloudflare cf-ray: 98ae75fa89eee8e0-BLR alt-svc: h3=":443"; ma=86400

This is the XUP namespace defined in the W3C Note "XUP - Extensible User Interface Protocol."

Note. This namespace may change without notice. For updated information, please refer to the latest version of the XUP Note.

For more information about XUP, please refer to the XUP Submission request. For more information about XML namespaces, please refer to the W3C Recommendation "Namespaces in XML Specification."

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Last modified: $Date: 2002/05/28 20:25:15 $