HTTP/2 200 date: Wed, 08 Oct 2025 15:16:56 GMT content-type: application/xml content-length: 3259 cf-ray: 98b69a28eea6a403-BLR last-modified: Fri, 19 Feb 2010 16:33:19 GMT etag: "61b7-47ff6a41eb1c0-gzip" cache-control: max-age=7776000 expires: Tue, 06 Jan 2026 15:16:56 GMT vary: Accept-Encoding,Origin content-encoding: gzip access-control-allow-origin: * x-backend: www-mirrors x-request-id: 98b69a28eea6a403 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 set-cookie: __cf_bm=mjiXy4jej_iDJ85wXbdecjx981v.nuZleLPe7p8pDKg-1759936616-1.0.1.1-O.nObkQSUTLsgs2VCgAY7vl.7DbM2SbZopNMlDP.XqqgJ3k2nmQqMiHQl9YNCftUt2neVm7t6gHbDW0oiw5sb_8OChNNeDW.aoL_o5fD3hQ; path=/; expires=Wed, 08-Oct-25 15:46:56 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None server: cloudflare alt-svc: h3=":443"; ma=86400 SSML 1.1 (Core Profile) no-namespace Schema (20080823) Copyright 1998-2008 W3C (MIT, ERCIM, Keio), All Rights Reserved. Permission to use, copy, modify and distribute the SSML core schema and its accompanying documentation for any purpose and without fee is hereby granted in perpetuity, provided that the above copyright notice and this paragraph appear in all copies. The copyright holders make no representation about the suitability of the schema for any purpose. It is provided "as is" without expressed or implied warranty. Importing dependent namespaces General Datatypes Duration follows "Times" in CCS specification; e.g. "25ms", "3s" number: e.g. 10, 5.5, 1.5, 9., .45 Modeled on number datatype: e.g. +4.5, -.45 Modeled on number datatype: e.g. +4.5%, -.45% Modeled on number datatype: e.g. 4.5%, .45% Modeled on relative datatype: e.g. +4.5st, -.45st number Hertz: e.g. 10Hz, 5.5Hz, 1.5Hz,, 9.Hz,, .45Hz relative Hertz: e.g. +10Hz, -5.5Hz, +1.5Hz, +9.Hz,+.45Hz soundLevel and prosody volume: +/- N.N dB descriptive values for height descriptive values for speed descriptive values for volume (Number%,pitch.datatype) list of whitespace separated contourpoints Time designation following Time in CSS2 Attributes and Groups Content Models Elements The 'allowed-within-sentence' group uses this abstract element.