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Re: [css3-mediaqueries][css3-values]

From: Florian Rivoal <florianr@opera.com>
Date: Wed, 25 Apr 2012 14:31:49 +0200
To: www-style@w3.org
Message-ID: <op.wdbmfbrp4p7avi@localhost.localdomain>
On Tue, 24 Apr 2012 23:05:29 +0200, Seo Sanghyeon <sanxiyn@gmail.com>  
wrote:

> css3-values defines 3 resolution units: dpi, dpcm, dppx.
> http://www.w3.org/TR/css3-values/#resolution
>
> But css3-mediaqueries mentions only dpi and dpcm. Is it
> intentional that css3-mediaqueries support only these
> resolution units?

<resolution> was first created in media-queries, then extended
in css3-images to support dppx, and finally collected in
css3-values, so that other specs can refer to it easily.

The intention is that dppx should be usable everywhere
<resolution> is used. The media query level 3 spec does not
reflect that simply because it was frozen before dppx was
devised, and we don't want to move the bar of what it means
to be a conforming implementation of media queries.

It is possible to support media queries without having dppx.
But any implementation that supports dppx is expected to
allow it in media queries as well.

  - Florian
Received on Wednesday, 25 April 2012 12:32:20 GMT

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