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Re: img alt=, next generation.

From: Charles McCathieNevile <charles@sidar.org>
Date: Tue, 26 Oct 2004 01:47:52 -0500 (CDT)
Message-ID: <33148.80.63.88.93.1098773272.squirrel@80.63.88.93>
To: "Pawson, David" <David.Pawson@rnib.org.uk>
Cc: "wai-ig list" <w3c-wai-ig@w3.org>

There's heaps of work in this area.

Do you mean is there a standard format for the information, or a standard
way of attaching the information to a given image format?

For most image formats there is the latter - e.g. the SVG metadata element
can have RDF in it, and there is a generic mechanism for includingh
information in JPG, PNG, WebCGM, GIF, etc etc.

XMP is a format for image information - essentially ti is a cut-down
version of RDF, so that I think you can put XMP into RDF tools and they
understand, but you can't put generic RDF into XMP tools.

Have a look at http://www.w3.org/TR/photo-rdf/ for some stuff, although
there is heaps more around.

If your images have URIs, then you can do it just by having RDF and
catalogue information, like real metadata systems do :)

If you could clarify the question I'll try to give a more detailed and
useful answer...

cheers

chaals

-- 
Charles McCathieNevile           charles@sidar.org
                 http://www.sidar.org

<quote who="Pawson, David">
>
> I've just been asked, is there any standard way
> of adding metadata to an image.
>
> Lets say in XML.
> If I have EXIF, or Adobe's XMP, i.e. lots
> of potential metadata,
> How should I add it?
>
> Anyone know if any work has been done in this area?
>
> EXIF, JPEG people etc?
Received on Tuesday, 26 October 2004 06:49:02 GMT

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