HTTP/2 301 date: Wed, 08 Oct 2025 21:51:44 GMT content-type: text/html; charset=iso-8859-1 location: https://www.w3.org/2003/06/wsdl/ cf-ray: 98b8dc782a2ed3d4-BLR cache-control: max-age=21600 expires: Thu, 09 Oct 2025 03:51:43 GMT x-backend: www-mirrors x-request-id: 98b8dc782a2ed3d4 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: EXPIRED set-cookie: __cf_bm=cq6Db6XAmmzeCSUu72xSMPjpPAKSirbGTttC2P8.QN8-1759960304-1.0.1.1-SoM9IviMarMiP8WgWgwmr_CH2Yaf2oo6wqv.NqiMuLu3xW4hIc_6gWn.1aVoep1Qqc7v74YJC8twYHSmbzcdTufsKiRvZZ76PrMCT9u8c7s; path=/; expires=Wed, 08-Oct-25 22:21:44 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None vary: Accept-Encoding server: cloudflare alt-svc: h3=":443"; ma=86400 HTTP/2 301 date: Wed, 08 Oct 2025 21:51:44 GMT content-type: text/html; charset=iso-8859-1 location: https://www.w3.org/2003/06/wsdl/wsdl12.xsd cf-ray: 98b8dc7cbb66d3d4-BLR cache-control: max-age=21600 expires: Thu, 09 Oct 2025 03:51:44 GMT x-backend: www-mirrors x-request-id: 98b8dc7cbb66d3d4 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: EXPIRED vary: Accept-Encoding server: cloudflare alt-svc: h3=":443"; ma=86400 HTTP/2 200 date: Wed, 08 Oct 2025 21:51:45 GMT content-type: application/xml content-length: 2037 cf-ray: 98b8dc817caed3d4-BLR last-modified: Tue, 01 Jul 2003 21:52:37 GMT etag: "3aee-3c16c6cda3340-gzip" cache-control: max-age=7776000 expires: Tue, 06 Jan 2026 21:51:45 GMT vary: Accept-Encoding content-encoding: gzip x-backend: www-mirrors x-request-id: 98b8dc817caed3d4 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: MISS accept-ranges: bytes server: cloudflare alt-svc: h3=":443"; ma=86400 This type is extended by component types to allow them to be documented. This type is extended by component types to allow attributes from other namespaces to be added. Any top-level, optional element is allowed to appear more than once - Any extensibility element is allowed in any place. Such extensibility elements must be in the substitution group of globalExt or postTypes Either the element attribute OR the type attribute may appear but not both. Alternatively a qualified extensibility attribute which refers to constructs in some type system other than XML Schema may be used. This abstract type is intended to serve as the base type for extensibility elements. It includes the wsdl:required attribute which it is anticipated will be used by most extension elements