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WebVTT (Web Video Text Tracks) is a World Wide Web Consortium (W3C) standard for displaying timed text in connection with the HTML5 <track> element.. The early drafts of its specification were written by the WHATWG in 2010 after discussions about what caption format should be supported by HTML5—the main options being the relatively mature, XML-based Timed Text Markup Language (TTML) or an ...
The W3C keeps two standards intended to regulate timed text on the Internet: the Timed Text Markup Language (TTML) [1] and WebVTT. [2] SMPTE created additional metadata structures for use in TTML and developed a profile of TTML called SMPTE-TT. [3] The DECE incorporated the SMPTE Timed Text in their UltraViolet Common File Format specification.
Timed Text Markup Language (TTML), previously referred to as Distribution Format Exchange Profile (DFXP), is an XML-based W3C standard for timed text in online media and was designed to be used for the purpose of authoring, transcoding or exchanging timed text information presently in use primarily for subtitling and captioning functions.
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The W3C Technical Architecture Group (TAG) is a special working group within the World Wide Web Consortium (W3C) created in 2001 [1] to: [2] [3] [4] document and build consensus around principles of Web architecture and to interpret and clarify these principles when necessary; resolve issues involving general Web architecture brought to the TAG;
The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
The HTML Working Group was an Internet Engineering Task Force (IETF) working group from 1994 to 1996, and a World Wide Web Consortium (W3C) working group from 1997 to 2015. [ 1 ] The working group was co-chaired by Paul Cotton , Sam Ruby , and Maciej Stachowiak .
Many of these W3C members helped author several versions of SMIL specifications between 1996 (when the first multimedia workshops were hosted by the W3C) and 2008 (when SMIL 3.0 was published). SMIL is an XML-based application, and is a part of many Multimedia Messaging Service (MMS) applications.