RE: Formal notice of proposed name change

The old namespace would now refer to a pre-release version, So it depends what you mean by applications and break. Readers of timed text can still accept docs in the old namespace, and should convert to the new ones. Writers of timed text should not produce the old form.

Sean Hayes
Media Accessibility Strategist
Accessibility Business Unit
Microsoft

Office:  +44 118 909 5867,
Mobile: +44 7875 091385

From: public-tt-request@w3.org [mailto:public-tt-request@w3.org] On Behalf Of Geoff Freed
Sent: 16 October 2009 7:23 PM
To: public-tt@w3.org
Subject: Re: Formal notice of proposed name change


a question re namespace:  for the benefit of applications that already make use of DFXP, is there a way to grandfather the old namespace so these applications won't break?

g.



On 10/16/09 12:19 PM, "Sean Hayes" <Sean.Hayes@microsoft.com> wrote:
The Timed Text working group is entertaining a proposal to change the name of the format to:

Timed Text Markup Language

and the title of the specification from:

Timed Text (TT) Authoring Format 1.0 - Distribution Format Exchange Profile (DFXP)

To :

Timed Text Markup Language (TTML) 1.0

The concept and name Distribution Format Exchange Profile (DFXP) will be retained, but relegated to the discussion in the body of the document.

The TR URI would change to  http://www.w3.org/TR/ttml

The media type would change to:  application/ttml+xml

The namespace URI's would change to undated URI's e.g.:

NamePrefixValue
Defaulttt:http://www.w3.org/ns/ttml
Parameterttp:http://www.w3.org/ns/ttml#parameter
Styletts:http://www.w3.org/ns/ttml#styling
Metadatattm:http://www.w3.org/ns/ttml#metadata
Profilenonehttp://www.w3.org/ns/ttml/profile/
Featurenonehttp://www.w3.org/ns/ttml/feature/
Extensionnonehttp://www.w3.org/ns/ttml/extension/

We will use the file suffix convention of .ttml for any generic TTML document, and .dfxp for documents which are known to conform to a defined exchange profile.

The DFXP profile designators will be known by the URI's:

DFXP Transformation http://www.w3.org/ns/ttml/profile/dfxp-transformation
DFXP Presentation http://www.w3.org/ns/ttml/profile/dfxp-presentation
DFXP Full http://www.w3.org/ns/ttml/profile/dfxp-full

The test suite would be updated to follow these changes in the week following the adoption of this change, implementations would be expected to adapt to these changes in order to be considered as passing the tests as evidence of implementation.

The deadline for objections to the change is the meeting on 23/10/09


Sean Hayes
Chair of TTWG