Re: TTML2/TTML1 Backwards compatibility analysis

Glenn,

I'm fine with that. Can you respond to my comments in the TTML1 issues?
I'll check each of them and add them to #358 if necessary.

Cyril

On Fri, Nov 3, 2017 at 4:13 PM, Glenn Adams <glenn@skynav.com> wrote:

> Since we already have an umbrella issue in TTML2 to handle incorporating
> fixes from TTML1 work, we can just add new sub-items to #358
> <https://github.com/w3c/ttml2/issues/358> to handle this (instead of
> adding a bunch of new TTML2 issues).
>
> On Fri, Nov 3, 2017 at 3:06 PM, Cyril Concolato <cconcolato@netflix.com>
> wrote:
>
>> Hi all,
>>
>> Just a quick message to let you know that I went through all TTML1 open
>> issues [2] to check if they had any impact on the compatibility between
>> TTML1 and TTML2. I have added comments to the issues for which I couldn't
>> tell if it had an impact or not. Otherwise, I have updated the Google doc
>> [1], mostly adding links. I did not find new incompatibilities (pending
>> responses in open issues).
>>
>> I did not add to the Wiki because it's hard to convert it to a wiki
>> format. Anyone knows a converter from Gdoc to Wiki?
>>
>> Cyril
>>
>> [1] https://docs.google.com/document/d/1Ri7RBBsbIK9SRxA1KsHR
>> ejXbYBuL4CRRrbmEZRbwZpg/edit#
>> [2] https://github.com/w3c/ttml1/issues
>>
>> On Fri, Oct 13, 2017 at 4:09 PM, Cyril Concolato <cconcolato@netflix.com>
>> wrote:
>>
>>> Hi all,
>>>
>>> Following yesterday's call, I started an analysis of the possible
>>> backwards compatibility issues of TTML2 vs TTML1. The results are here:
>>> https://docs.google.com/document/d/1Ri7RBBsbIK9SRxA1KsHRejXb
>>> YBuL4CRRrbmEZRbwZpg/edit?usp=sharing
>>>
>>> This is my analysis, and it might contain errors, oversights. If it is
>>> the case, feel free to comment on it.
>>>
>>> With the current status, it looks to me that there is no real backwards
>>> compatibility issue, in the sense that a TTML2 processor would produce a
>>> result, when processing a TTML1 document, that would be acceptable with
>>> what the TTML1 spec indicates.
>>>
>>> HTH,
>>> Cyril
>>>
>>>
>>>
>>
>