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Proper way to markup citations and detailed image alt text?

for

From: Dean Hamack
Date: Jan 15, 2009 12:25PM

I'm currently writing an online article that includes citations and pie
charts. Looking for some input on how to mark them up properly.

If you go to Wikipedia's site, you will often times see a statistic quoted
and a numbered link after it. If you click on the numbered link, it jumps to
a numbered citation in the footer via an anchor link. Is that acceptable?
Seems like it might be a bit confusing to a screenreader user to me.

And let's say you have a pie chart which shows percentages of something. I
can easily create text that says "x=20%, y=50%, etc." but it seems like it
might be a little long for an alt tag.

Dean Hamack
Lead Web Developer
Bushido Designs
Tel:(206)523-6705
www.bushidodesigns.net