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RE: Duration of an SVG file

From: Andrew Emmons <andrew.emmons@quickoffice.com>
Date: Thu, 10 Jul 2008 06:57:22 -0500
To: Julien Reichel <Julien.Reichel@spinetix.com>
CC: "www-svg@w3.org" <www-svg@w3.org>
Message-ID: <A13D0B44629697468E9C6AE200CFD39A524E3D4F70@mailkeeper.mdigitalm.com>

Hello Julien,

The SVG WG discussed this issue today during our telcon. The group thinks the idea of specifying the duration of an SVG file has a lot of merit. It will be looked at closely in a future module/version of SVG.

Regards,
Andrew, On behalf of the SVG WG


> -----Original Message-----
> From: Julien Reichel [mailto:Julien.Reichel@spinetix.com]
> Sent: Thursday, July 10, 2008 3:23 AM
> To: Andrew Emmons; Michael Curtes
> Cc: www-svg@w3.org
> Subject: RE: Duration of an SVG file
>
> Hi Andrew and all,
>
> Thanks for your answers.
>
> > > > I think it's great that you've come up with a solution that works
> > > > for your work and I think proposing modifications to the spec is
> > > > only a good thing. It gives us all a chance to debate something.
> > >
> > > Actually learning that other UA are facing the same problem of SVG
> > > duration comfort me in my opinion that something should be done for
> > > this subject. If some UA are computing an automatic duration for
> SVG
>
> > > files and other are considering the file to be of infinite duration
> > > this will make it very difficult for user to create content that
> can
>
> > > be displayed in the different UA.
> >
> > We have found it depends on the use case. For you and some of
> > our customers, one may want to know the dur of the SVG file.
> > However, for a generic SVG player, or one heavily using user
> > interaction and scripting in content, knowing the 'dur' of
> > the top-level SVG is not only impossible but it also has no
> > meaning. At any time user interaction, timer events, AJAX,
> > etc could come in and change the content, start an animation,
> > etc.  To us, this was more of an implementation detail than
> > an issue with the SVG language.
>
> Actually that the nice point of having an explicit dur attribute on the
> svg element. In most case it is absent and thus the duration of the SVG
> file in indefinite. This is what you would use for scripted files for
> instance.
>
> In some case, when the creator of the file wants to explicitly specify
> a
> duration of a file it is possible (which is not the case with the
> current specs). It just need to add the dur attribute to the svg
> element.
>
> That why I like using an explicit specification of the duration instead
> of relying on complex model to compute it automatically :-)
>
> Best regards
>
> Julien
>
>
>
> >
> > All the best,
> > Andrew
> >
Received on Thursday, 10 July 2008 11:59:17 GMT

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