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Re: Follow-Up: Elliptical arc minimal syntax

From: Erik Dahlstrom <ed@opera.com>
Date: Mon, 12 Apr 2010 10:38:29 +0200
To: "Jeff Schiller" <codedread@gmail.com>, www-svg <www-svg@w3.org>
Message-ID: <op.va1jmccpgeuyw5@localhost>
On Mon, 12 Apr 2010 04:35:51 +0200, Jeff Schiller <codedread@gmail.com>  

> http://lists.w3.org/Archives/Public/www-svg/2010Apr/0031.html
> 1) All browsers except for WebKit parse the elliptical-arc-argument
> production as:
> elliptical-arc-argument:
>     nonnegative-number comma-wsp? nonnegative-number comma-wsp?
>         number comma-wsp flag comma-wsp? flag comma-wsp? coordinate-pair
> i.e. a comma-wsp? between the two flags and between the sweep-flag and
> the coordinate-pair.

Right, thanks for pointing that out. The gist of what I said in that  
telcon was that I believed it to be simple to update the spec grammar to  
reflect the intent (for the elliptical arc grammar).

It's now been updated (as part of ACTION-2754), see  

> 2) WebKit also accepts values for 'flag' other than "0" or "1" (and
> interprets anything other than "1" as a "0").  I've looked at the
> code.

No change has been made in the spec for that bit.

> Since Firefox, Opera, Batik and IE9 all support the above, I guess it
> would make sense for WebKit to align with this for interoperability.
> I will raise a bug against WebKit.  Is there a ruling on which spec
> will be updated for this?  Can we get an official word from the SVG WG
> so I can link to it?

The change was committed to the SVG 1.1 second edition spec[1], along with  
a new test[2].


[1] http://dev.w3.org/SVG/profiles/1.1F2/publish/paths.html#PathDataBNF

Erik Dahlstrom, Core Technology Developer, Opera Software
Co-Chair, W3C SVG Working Group
Personal blog: http://my.opera.com/macdev_ed
Received on Monday, 12 April 2010 08:39:07 UTC

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