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Images with known meaning. Re: lexical discussions:

From: Charles McCathieNevile <charles@w3.org>
Date: Tue, 18 Sep 2001 05:07:15 -0400 (EDT)
To: Al Gilman <asgilman@iamdigex.net>
cc: David Poehlman <poehlman1@home.com>, wai-ig list <w3c-wai-ig@w3.org>
Message-ID: <Pine.LNX.4.30.0109151254130.26750-100000@tux.w3.org>
Charles, Danbri, Libby, Marja, and the "Dublin Core community" among others.

In discussing SVG as a leap forward for accessibility, a major part of it is
the ability to pull apart and put together known pieces of imagery
http://www.w3.org/TR/SVG-access (It even allows this to be done for formats
thought of as less useful, like .gif and .jpg)

In looking at the benefits of the semantic web, we see the other piece of
the puzzle - the ability to record these linking statements
http://www.w3.org/2001/Talks/0627-semweba has some little examples

The annotea project allows us to make statements about anything on the Web,
including RDF explicitly relating an image to a word (for example derived
from wordnet, a dictionary that itself makes formalrelationships between
words, such as "the noun 'eagle' refers to a subclass of 'raptor' - and that
is self is a type of 'bird'").

Dublin Core is a small vocabulary of statements about things, and a vast
amount of information is collected in dublin core statements. One of the many
tools for doing this is photo-rdf http://www.w3.org/TR/photo-rdf which adds
information directly into jpeg files (which is the typical format for

Dan and Libby have been working on a tool for recording "codepictions" -
pictures of two or more people ( http://www.w3.org/2001/08/rdfweb/svg-foaf ).
I added to that a technique for marking which bit of a whole image is a
picture of which person - easy really, because it simply involved using the
ideas written about SVG and semantic web coming together.

These are a couple of home-grown solutions - rather like http in that sense.
If nobody uses them, they die, if people pick them up they have potential for
providing masses of information.

There are of course other such systems, and the trick is to link them.

==== technical philosophy discussion:

Why RDF in particular and the semantic web in general?

Well, RDF in particular is a format for recording semantic web information
where there are lots of available tools that can be re-used. It is like the
choice of HTML for web pages - it has a lot of working tools, and some good
features. It probably isn't perfect yet, any more than the alternatives, but
it seems likely that it has critical mass to become a standard (as in "the
thing that everyone uses", not just "the thing we said people should use").

The semantic web is a way of collecting up the various bits of information
without having to have a single massive server, which would require a lot of
resources. It has the downside that collecting up information that is
initially very scattered is slow. But as the connections are made, the rate
of information available grows extremely rapidly - connect two services
together of the same sizes and you double what is there. And so on... (well,
this is how the Web grew to a fairly large extent).

On Sat, 15 Sep 2001, Al Gilman wrote:

  OK, let me give this away.  This is worth an NSF grant, in my opinion.  I had
  been dog in the mager hoarding it on that basis.
  The basic resource is a thesaurus which relates words and pictures.  What
  There is is.  it takes mobilization of an organized team to pull it off and
  maintain the hub resources.  Who wants to make it happen?
Received on Tuesday, 18 September 2001 05:07:19 UTC

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