Re: Colors

OpenCyc has colors represented as owl classes, e.g.
"red<http://sw.opencyc.org/concept/Mx4r0L_kLnS6EdaAAACgyZzFrg>"
is the class of all things that are red. All colors are instances of the
second-order class
color<http://sw.opencyc.org/concept/Mx4rr19QJHStEdaAAACgyZzFrg>
.

David Baxter

On Wed, Feb 24, 2010 at 4:39 AM, Christoph LANGE <
ch.lange@jacobs-university.de> wrote:

> 2010-02-24 08:31 Pat Hayes <phayes@ihmc.us>:
> > Does anyone know of URIs which identify colors? Umbel has the general
> > notion of Color, but I want the actual colors, like, you know, red,
> > white, blue and yellow. I can make up my own, but would rather use
> > some already out there, if they exist.
>
> Do you really need URIs?  I.e. do you want to add further descriptions or
> links to colors, such as "color1 is nicer than color2", or "color can be
> produced from material" – or do you just want to point to colors ("thing
> has
> color")?  In the latter case, wouldn't literals with datatypes be
> sufficient?
> For literals, there is at least a standard for RGB colors: #RRGGBB.  Still,
> here it's the standard _datatype_ that's missing.
>
> Cheers,
>
> Christoph
>
> --
> Christoph Lange, Jacobs Univ. Bremen, http://kwarc.info/clange, Skype
> duke4701
>