ISSUE-196: Constraining encoding to UTF-8

UTF-8 Encoding Constraint

Constraining encoding to UTF-8

TTML Simple Delivery Profile for Closed Captions (US)
Raised by:
Pierre-Anthony Lemieux
Opened on:
In order to simply implementation and facilitate interoperability, SDP-US document encoding could be constrained to UTF-8 (<?xml encoding='UTF-8'?>) when a concrete representation is created.

This approach has been taken by other XML-based standards, including CFF-TT.
Related Actions Items:
Related emails:
  1. ISSUE-197: charset/encoding unconstrained [DFXP 1.0] (from on 2012-11-29)
  2. RE: TTML Agenda for 28/11/12 (from on 2012-11-29)
  3. TTML Agenda for 28/11/12 (from on 2012-11-29)
  4. TTWG Meeting Minutes Nov 15, 2012 (from on 2012-11-15)
  5. ISSUE-196 (UTF-8 Encoding Constraint): Constraining encoding to UTF-8 [Simple Delivery Profile for Closed Captions] (from on 2012-11-15)

Related notes:

TTWG Nov 15:

Resolved to add 2 requirements to mandate use of XML 1.0 and character encoding of UTF-8.

Monica Martin, 16 Nov 2012, 02:46:02


Glenn Adams, 29 Nov 2012, 07:29:55

TTWG Nov 29 approved editor updates:

Monica Martin, 2 Dec 2012, 23:10:18

Display change log ATOM feed

David Singer <>, Nigel Megitt <>, Chairs, Thierry Michel <>, Philippe Le H├ęgaret <>, Staff Contacts
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <>.
$Id: index.php,v 1.325 2014-09-10 21:42:02 ted Exp $