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Re: EARL: Simple Sample

From: Wendy A Chisholm <wendy@w3.org>
Date: Wed, 14 Feb 2001 16:48:41 -0500
Message-Id: <>
To: "Sean B. Palmer" <sean@mysterylights.com>, <w3c-wai-er-ig@w3.org>
I'd be happy to work on an example, but I don't know exactly what that 
means.  What do you envision?  An evaluation report of site A written in 
EARL?  For example, if I look at the output of WAVE on 
http://www.w3.org/WAI/  I can see that WAVE asserts a reading order of the 
page.  WAVE also asserts that every image has alt-text and that none seem 
to be suspicious.   Now I need to figure out how to state these assertions 
using the syntax we've been discussing...

First attempt will be to assert that I think the alt-text on the image that 
linearizes the table is ok.  Using Sean's latest summary of a syntax [1] 
combined with what we discussed on Monday [2] and Len's summary of that 
discussion [3]...I have thrashed the syntax, but here's a stab...probably 
in the dark. (I've combined my references in this paragraph with 
prefixes...hope that isn't confusing)

[1] @prefix 
[2] http://www.w3.org/WAI/ER/2001/02/12-minutes.html
[3] @prefix 
@prefix h:http://www.w3.org/TR/xhtml1/
@prefix earl:http://earl  #doesn't exist

#use XPath to express which image we're making an assertion about
<h:img[@src="/Icons/detab"]> has <h:@alt> of "change column layout"

<earl:person> <#name> "wendy"

"wendy" <earl:asserts> "the alt attribute of <h:img[@src="/Icons/detab"]> 
has <l:quality>"

#The assertion shouldn't be a string, but wasn't sure how to fit it into 
the vocabulary or syntax.  All of these should be strung together into one 
assertion, shouldn't they?

Not sure what to do about reading order.  Sean, is this the type of 
exercise you were hoping we would do?


At 01:57 PM 2/12/01 , Sean B. Palmer wrote:
>One of the problems with coming up with a simple EARL example is that EARL
>is so encompassing and generic. If we had an example of EARL where a page
>was being WCAG rated (i.e. rubber stamped), there is nothing in that that
>can provide an example of testing an SVG graphic for accessibility or one
>of the many thousands of things that EARL could be used for.
>Maybe we should all work on a few examples each, and then submit them to
>the list? That way, we shall get many issues covered at once. If all
>examples had some sort of summary of problems faced, etc., then that would
>be even more sueful. If we can first come to some knid of agreement about
>the vocabulary, and how we use it, then we can all see how many more terms
>we needed to invent for our actual practical examples. Note that if you
>invent a new property, it might be possible to define it as being related
>to something that has already been defined in the EARL vocabulary... this
>is the kind of modular thing that I keep ranting on about.
>Is this a good idea? I think pragmatism will warrant useful results for
>EARL at this stage.
>Kindest Regards,
>Sean B. Palmer
>@prefix : <http://webns.net/roughterms/> .
>[ :name "Sean B. Palmer" ] :hasHomepage <http://infomesh.net/sbp/> .

wendy a chisholm
world wide web consortium
web accessibility initiative
madison, wi usa
tel: +1 608 663 6346
Received on Wednesday, 14 February 2001 16:40:25 UTC

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