Re: [css3-images] Resolution (was: 4.3.2 Lengths (reference pixel?))

On Dec 16, 2010, at 8:01 AM, Christoph Päper <christoph.paeper@crissov.de> wrote:

> Brad Kemper <brad.kemper@gmail.com>:
> 
>> In what contexts are "pixel size or similar in micrometers or millimeters" used to describe resolution?
> 
> Well, being the reciprocal it’s basically the same expressed differently. “254 DPI” <=> 0.1mm

I understand, but I thought you were saying that it is (or was) common to list it that way, without the "dots per", "pixels per", etc. So I am asking when and where resolution is listed that way. For printers, or what?