CR: Timed Text Markup Language 1 (TTML1) (Third Edition)

Timed Text Markup Language 1 (TTML1) (Third Edition)

https://www.w3.org/TR/2018/CR-ttml1-20180424/

feedback due by: 2018-05-22

Abstract


This document specifies Timed Text Markup Language (TTML), Version 1, also known as TTML1, in terms of a vocabulary and semantics thereof.

The Timed Text Markup Language 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.

It 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, TTML Content may be used directly as a distribution format, for example, providing a standard content format to reference from a <track> element in an HTML5 document, or a <text> or <textstream> media element in a [SMIL 2.1] document.

Status of the Document


This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/.

This document was published by the Timed Text Working Group as a Candidate Recommendation. This document is intended to become a W3C Recommendation. Comments regarding this document are welcome. Please send them to public-tt@w3.org (subscribe, archives) with [ttml1] at the start of your email's subject. W3C publishes a Candidate Recommendation to indicate that the document is believed to be stable and to encourage implementation by the developer community. This Candidate Recommendation is expected to advance to Proposed Recommendation no earlier than 22 May 2018.

This edition of the Timed Text Markup Language (TTML) 1.0 [TTML10] clarifies ambiguities and corrects errors identified in the previous edition, which this edition supersedes. No feature is added or removed in this edition.

For this specification to exit the CR stage, at least 2 independent implementations of every CR exit criteria test are required, as documented in the Working Group's implementation report. These CR exit criteria tests are intended to cover the ambiguities and errors corrected by this edition, and the implementation report will be limited to these tests. The Working Group does not require that implementations are publicly available but encourages them to be so.

Substantive changes applied since the previous version of this specification are listed at substantive-changes-summary.txt.

For convenience, a diff between this and the previous edition is offered at the W3C HTML Diff service.

The Working Group has not identified features "at risk" for this specification.

Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.

This document is governed by the 1 February 2018 W3C Process Document.