ISSUE-182: Allow more than one profile to be used in the SDP-US. Add use of ttp:profile element.

Allow more than one profile to be used in the SDP-US. Add use of ttp:profile element.

State:

CLOSED

Product:

TTML Simple Delivery Profile for Closed Captions (US)

Raised by:

Monica Martin

Opened on:

2012-09-18

Description:

Issue: Allow more than one profile to be used in the SDP-US. Add use of ttp:profile element.

Benefit: Allows SDP-US to use TTML 1.0, SDP-US profile URI, and other profiles. TTML 1.0 already defines the mandatory processing semantics for the intersection of required elements of the profile(s) that apply (Section 5.2).[1]

Proposal to add the following:[2]
1. Language in Section 1 that indicates use of other profiles is not precluded; retain URI requirement for this profile.
2. The profile element to the list of elements in R0007, Section 5.2.2.
3. Language in Section 5.4.2 that articulates how multiple profile elements may exist.


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[1]
TTML 1.0 Section 5.2: If more than one ttp:profile element appears in a TTML document instance, then all specified profiles apply simultaneously.”
[2] Proposed changes (in bold)
Section 1
This constrained profile enumerates a set of required TTML features, some of which may be constrained in behavior, and the capabilities required of a Presentation Processor in TTML 1.0. The semantics defined in TTML 1.0 apply unless otherwise constrained in this profile.

Claims of conformance MUST use this URI and implement the required features and constraints of use and processing outlined in this profile.

Name Designator
simple-delivery http://www.w3.org/TR/profile/simple-delivery


Conformance to this profile does not preclude the:
• Use of other features defined in TTML 1.0. Such behavior is not defined here.
• Use of other profiles that may implement the features in this profile.

Section 5.4.2
Add to Note (1). NOTE: See also Conformance. TTML 1.0 allows zero or more profiles (ttp:profile in the head element) to be specified and used simultaneously. A player may reject documents it does not understand.

Add to Note (2). NOTE: When the use attribute is used on the ttp:profile element, the use attribute could indicate the geographical region for which the profile is used. For example, specific styling capabilities could be used in a particular geographical region. See also Other Constraints.

Requirement R0007
Add ttp:profile element to the list.

Related Actions Items:

• ACTION-117 on Monica Martin to Add other features related to ttp:profile to Issue-182. - due 2012-10-25, closed
• ACTION-122 on Glenn Adams to Implement agreed original + additional proposal for Issue-182. - due 2012-11-01, closed

Related emails:

1. RE: TTML Agenda for 28/11/12 (from mdolan@newtbt.com on 2012-11-29)
2. TTML Agenda for 28/11/12 (from Sean.Hayes@microsoft.com on 2012-11-29)
3. TTWG Meeting Minutes Nov 15, 2012 (from momartin@microsoft.com on 2012-11-15)
4. RE: TTML Agenda for 15/11/12 (from mdolan@newtbt.com on 2012-11-15)
5. TTML Agenda for 15/11/12 (from Sean.Hayes@microsoft.com on 2012-11-15)
6. RE: Issue 1 for R0007 Raised with Issue-182 (...WAS: RE: Update to Issue-182 Proposal and Completion of Action-117) (from momartin@microsoft.com on 2012-11-15)
7. Issue 1 for R0007 Raised with Issue-182 (...WAS: RE: Update to Issue-182 Proposal and Completion of Action-117) (from momartin@microsoft.com on 2012-11-15)
8. RE: Update to Issue-182 Proposal and Completion of Action-117 (from momartin@microsoft.com on 2012-11-13)
9. Re: Update to Issue-182 Proposal and Completion of Action-117 (from glenn@skynav.com on 2012-11-13)
10. RE: Update to Issue-182 Proposal and Completion of Action-117 (from momartin@microsoft.com on 2012-11-12)
11. Re: Update to Issue-182 Proposal and Completion of Action-117 (from glenn@skynav.com on 2012-11-11)
12. TTML Agenda for 1/11/12 (from Sean.Hayes@microsoft.com on 2012-11-01)
13. RE: Update to Issue-182 Proposal and Completion of Action-117 (from momartin@microsoft.com on 2012-10-25)
14. Update to Issue-182 Proposal (from momartin@microsoft.com on 2012-10-18)
15. RE: TTML Agenda for 20/9/12 (from Sean.Hayes@microsoft.com on 2012-09-20)
16. ISSUE-182: Allow more than one profile to be used in the SDP-US. Add use of ttp:profile element. [Simple Delivery Profile for Closed Captions] (from sysbot+tracker@w3.org on 2012-09-18)

Related notes:

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