[uf-discuss] RFC: Using <img>'s alt attribute for Microformats
Charles Iliya Krempeaux
supercanadian at gmail.com
Thu Dec 15 09:18:38 PST 2005
On 12/15/05, Tantek Çelik <tantek at cs.stanford.edu> wrote:
> On 12/15/05 8:16 AM, "Scott Reynen" <scott at randomchaos.com> wrote:
> > Maybe I'm misunderstanding you, but it doesn't seem to me that using
> > alt for machine data follows the humans first principle
> The idea is to use the alt for the human readable text version of what is in
> the image, sorry I wasn't clear about that.
> > because
> > imageless humans are reading alt tags.
> > As a human, I'd hate to be
> > reading something like this in a screen reader:
> > <img class="bday" src="today.png" alt="20051215T080000Z" />
> > And my first inclination would be to give imageless humans something
> > more readable by putting the machine data in the title attribute
> > instead, e.g.:
> > <img class="bday" src="today.png" alt="December 15, 2005"
> > title="20051215T080000Z" />
> > This is sending three different types of data to three different
> > types of readers.
> AFAIK this is the first we have discussed using the <img> tag to convey
> three pieces of information like that.
> > src is for imaged humans, alt is for imageless
> > humans, and title is for machines. I understand the drawback of
> > further complication, but the alternative seems to require authors to
> > choose between usability and microformats.
> Here is my question:
> Have you seen any examples on the Web where people are publishing date-time
> information as an image?
>From usability point of view, if is sometimes betters to use images to
convey information (when you can), So,.... this isn't a published
date-time, but how about a progress bar:
<img src="progress-bar" alt="38% done (you stil have a ways to
go)" title="0.38" />
Using the "alt" and "title" would both be very useful. You see these
in the wild all the time.
Charles Iliya Krempeaux, B.Sc.
charles @ reptile.ca
supercanadian @ gmail.com
developer weblog: http://ChangeLog.ca/
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