Accessible flow diagrams

[kiwibrit]

Is there a truly accessible way of showing flow diagrams - used to aid a moderately complex decision-making process? At the moment I am thinking of dropping in a gif or png. With an alt tag, that would pass an automated test, I think; but I would prefer really to help the end-user.

[kiwibrit]

One way I have thought of is a series of php pages opening up, dependent on previous selection. Clunky though.

[the tree]

If it were a basic structure then nested lists would be your awnser but as you said it's complicated I'm thinking you should be using internal links.

<div class="step" id="A">
<p>Does the thing do the thing?</p>
<ul>
<li><a href="#AA">Yes</a></li>
<li><a href="#AB">No</a</li>
</ul>
</div>
<div class="step" id="AA">
<p>Then hit it. <strong>End of process</strong></p>
</div>

[kiwibrit]

I rather like that. I'll have a play. It may also be possible with nested lists - I'll have a look at that, too. Thanks.