ISSUE-348: Make metric optional in offset-time form of time expressions. [TTML2] from Timed Text Working Group Issue Tracker on 2014-09-23 (public-tt@w3.org from September 2014)

From: Timed Text Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Tue, 23 Sep 2014 18:40:56 +0000
To: public-tt@w3.org
Message-Id: <E1XWV1E-0002Yp-NY@shauna.w3.org>

ISSUE-348: Make metric optional in offset-time form of time expressions. [TTML2]

http://www.w3.org/AudioVideo/TT/tracker/issues/348

Raised by: Glenn Adams
On product: TTML2

In SMIL and SVG, time expressions that employ the offset-time form may elide the metric component, in which case 's' (seconds) is implied. This change will improve interoperability with existing W3C practice by reducing differences that need to be accounted for by authors. Note, however, that TTML2 documents that employ this minimization technique will not otherwise be compatible with TTML1 without first transforming the document to add the default 's' metric. Given that TTML2 documents are already not backwards compatible with TTML1 in a variety of ways, this does not establish a precedent.

Received on Tuesday, 23 September 2014 18:40:58 UTC