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Re: portable network graphics

From: Charles McCathieNevile <charles@w3.org>
Date: Mon, 10 Jul 2000 23:21:18 -0400 (EDT)
To: "Benjamin J. Simpson" <arcben@hotmail.com>
cc: w3c-wai-ig@w3.org
Message-ID: <Pine.LNX.4.20.0007102312190.14670-100000@tux.w3.org>
There is a Note that was submitted to W3C on storing Metadata in photographic
images - the example used adds metadata (which can include all kinds of
stuff, not just "the alt") to jpg images, but the principle is almost exactly
the same for gif and png images. The Note is on the W3C Technical Reports
page - http://www.w3.org/TR and is called describing and retrieving photos
using RDF and HTTP - http://www.w3.org/TR/rdf-photo  

For Scalable Vector Graphics it is possible to use metadata as well as
alternative content included in the image - this may represent a big
improvement. There is a draft on Accessibility Features of SVG (The
specification of SVG itself is still a working draft, although a fairly
mature one) at http://www.w3.org/1999/09/SVG-access - all comments are


Charles McCN

On Mon, 10 Jul 2000, Benjamin J. Simpson wrote:

  Can screen readers pick up png metadata?
  It seems that 'separating content from presentation' is a fair description
  for 'making site accessible'.  Integrating the equivalent of an 'alt tag'
  into an image file seems to be along these lines.  Is there anything going
  on to get rid of alt tags and put that information somewhere else?

Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134 136
W3C Web Accessibility Initiative                      http://www.w3.org/WAI
Location: I-cubed, 110 Victoria Street, Carlton VIC 3053
Postal: GPO Box 2476V, Melbourne 3001,  Australia 
Received on Monday, 10 July 2000 23:21:27 UTC

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