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Re: Assumption in the SVG specifications

From: Cyril Concolato <cyril.concolato@enst.fr>
Date: Thu, 31 Aug 2006 15:35:46 +0200
Message-ID: <44F6E5B2.2050404@enst.fr>
To: Robin Berjon <robin.berjon@expway.fr>
Cc: Dave Singer <singer@apple.com>, www-svg <www-svg@w3.org>

Hi Robin,

I recall a few arguments. Some people, I was one of them, wanted 'image' 
to only point to static images and animations to point to animated 
vector graphics, because it would not be possible to control the timing. 
IIRC, the problem was that SVG 1.1 Full allows animated SVG content on 
'image'. So we ended up saying that image should not point to vector 
graphics because otherwise, the same content would have led to different 
behaviors in  a 1.1 Full and 1.2 Tiny player.

Best regards,


Robin Berjon a écrit :
> Hi Dave,
> On Aug 31, 2006, at 14:19, Dave Singer wrote:
>> The first three questions enable the client to know 'does it use 
>> screen real-estate?', 'do I need to connect to an audio output 
>> device?' and 'do I need to manage the content handler providing a 
>> visual presentation that changes over time, might the user want 
>> (perhaps) at least a play/pause control?'.  They are all questions 
>> about how the content is *presented*.  The animation tag seems to be 
>> asking about how it is *coded*, by contrast, and not surprisingly, 
>> this raises questions.
>> I have to say I am quite surprised that the answer to the question 
>> "what tag should I use to display an illustrator image" is not 
>> "image" but "animation", but that the answer would change if I 
>> rendered the image *to the same visual quality and effect* to a PNG 
>> file and then embedded that (the user should be able to detect no 
>> difference at all).
> Don't I recall that this dichotomy, which several of us opposed but 
> not sufficiently to stop it, was introduced at the behest of the LASeR 
> group? Maybe someone there remembers what the rationale was?
> --Robin Berjon
>    Senior Research Scientist
>    Expway, http://expway.com/
Received on Thursday, 31 August 2006 13:36:15 UTC

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