This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title
links to the most recent version of a document.
Completed Work
W3C Recommendations have
been reviewed by W3C Members, by software developers, and by other
W3C groups and interested parties, and are endorsed by the
Director as Web Standards. Learn more about the W3C Recommendation
Track.
Group Notes are not standards and do not
have the same level of W3C endorsement.
Standards
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2016-04-21
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This document specifies two profiles of [TTML1]: a text-only profile and an image-only profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats. The text profile is a superset of [SDPUS]. Both profiles are based on [SUBM].
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2013-09-24
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This document specifies the distribution format exchange profile (DFXP) of the timed text authoring format (TT AF) in terms of a vocabulary and semantics thereof. The timed text authoring format is a content type that represents timed text media for the purpose of interchange among authoring systems. Timed text is textual information that is intrinsically or extrinsically associated with timing information. The Distribution Format Exchange Profile is intended to be used for the purpose of transcoding or exchanging timed text information among legacy distribution content formats presently in use for subtitling and captioning functions. In addition to being used for interchange among legacy distribution content formats, DFXP content may be used directly as a distribution format, for example, providing a standard content format to reference from a <text> or <textstream> media object element in a [SMIL 2.1] document.
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Group Notes
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2017-09-11
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This specification defines a mechanism for storing images that use the Reference PQ EOTF specified in [BT2100-1] in the Portable Network Graphics (PNG) format, without modification to existing chunks or the introduction of new chunks.
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2015-12-03
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Aggregates requirements of a user with disabilities with respect to audio and video on the Web, providing background on user needs, alternative content technologies, and their application on the Web.
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2013-02-05
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The Simple Online Delivery profile is focused on streamlined delivery of closed captions on the Internet, supporting core TTML features to deliver content originating legacy formats such as CEA-608 and -708 content, and is targeted primarily for delivery in US markets.
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2006-04-27
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This document specifies usage scenarios and requirements for a timed text authoring format. A timed text authoring format is a content type that represents timed text media for the purpose of interchange among authoring systems. Timed text is textual information that is intrinsically or extrinsically associated with timing information.
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Drafts
Below are draft documents:
Proposed Recommendations, other Working Drafts .
Some of these may become Web Standards through the W3C Recommendation Track
process. Others may be published as Group Notes or
become obsolete specifications.
Proposed Recommendations
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2018-02-27
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This document specifies two profiles of TTML1: a text-only profile and an image-only profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats.
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Other Working Drafts
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2017-10-17
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This specification defines two profiles of TTML2: a text-only profile and an image-only profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats.
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W3C
