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Re: comments on Exchange SVG form

From: Chris Lilley <chris@w3.org>
Date: Mon, 13 Mar 2000 17:39:02 +0100
Message-ID: <38CD19A6.6A627D82@w3.org>
To: Christophe Jolif <jolif@ilog.fr>
CC: Thierry Kormann <Thierry.Kormann@sophia.inria.fr>, www-svg@w3.org


Christophe Jolif wrote:
> 
> Thierry Kormann wrote:
> >
> > Christophe,
> >
> > > It is still possible to have a blue 'rect' even with the ID selector on
> > > it. For example just by having a user style sheet containing:
> > >
> > > svg #myid { fill:blue } (2)

No, that will be overridden by an author stylesheet. (what is the (2) for,
BTW) however

  svg #myid { fill:blue !important }

in the user stylesheet will indeed override the color. 

> > Of course it's possible but the only way to override the color is
> > to _know_ the id of the rect element. In most cases, the user
> > does not know and really don't care about the id of each element.
> >
> > So the solution is correct and still usable.

Or rather, if the user does actually know the ID it is because they really
do need to take the trouble to restyle the graphic. In practice that is
because of an accessibility need, or some other reason that justifies
investing time and effort into examining the graphic and restyling it.

> The only problem of your solution is the "in most cases"... It seems
> that some companies really need to be sure of the resulting color...

Well they can't be. The user might have a black and white display. The user
might not be sighted. 

This of course applies equally well to traditional, carefully produced
printed catalogues. All the mnanufacturers can do is to assure that the
intent is communicated faithfully to the output device (control of color
profiles from scanner, through pre-press, to print production) and that
avoidable variation (such as within a print run or between print runs) is
eliminated and that, when looked at under a light source not to far from
natural daylight, the color is a good approximation of the actual item
being purchased. In other words, they deliver good information and have
reasonable expectations about viewing.

The manufacturers have no control whatsoever if the user chooses to look at
the catalogue in a disco with UV strobes and flashing green lights, or in
the red light from a lava lamp, or leaves it in the sun to fade for three
months, or something; and equally, they have no control over the user not
actually being sighted at all and someone else saying verbally the shirt is
a "light green", the user imagining lime, and the shirt actually being a
pale khaki. But in "most" or "the overwhelming majority" of cases, users
don't attempt to make color critical choices under bizarre lighting
conditions or from a faded tatty catalogue.

--
Chris
Received on Monday, 13 March 2000 11:39:16 GMT

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