- From: Chris Ridpath <chris.ridpath@utoronto.ca>
- Date: Mon, 25 Sep 2006 09:53:19 -0400
- To: "Shadi Abou-Zahra" <shadi@w3.org>, <public-wai-ert@w3.org>
The confidence property is useful when applied to an accessibility test result. Some tests have a high confidence that the result is correct while other tests have a low confidence that the result is correct. For example a test that looks for an alt attribute on an image element will have a high confidence that the result is correct. A test that tries to determine if the alt text is appropriate for an image with give a result that has a low confidence is correct. It's useful to know how confident the test result is. Tests with a high confidence level that fail are more likely to need user intervention while tests with a low confidence level that fail are less likely to need user intervention. This is useful information when trying to decide which accessibility problems really exist and need fixing. I think the confidence property should be in EARL and we should specify what it means. We can use a 3 level scale (high, medium and low) or some sort of numeric scale. Cheers, Chris ----- Original Message ----- From: "Shadi Abou-Zahra" <shadi@w3.org> To: <public-wai-ert@w3.org> Sent: Monday, September 25, 2006 4:41 AM Subject: do we want to omit the confidence property? > > Dear Group, > > Even though this discussion has come up several times in the past, it is > worth a revisit in the light of the latest status of the EARL schema. The > issue is that earl:confidence is not specified in any way (not even a > recommendation on how to use it) thus making it effectively useless. The > only argument for keeping this property in the schema is to have a > consistent extension point for this type of information. However, this > information will not be interchangeable between tools if there is no > guidance on how to use the property. > > The possible directions are: > > 1. keep it as it currently is, even though it is ambiguous > 2. drop the property as a whole until there is enough interest > 3. invest time to define a proper usage for the property > > What are peoples thoughts on this? > > Regards, > Shadi > > > -- > Shadi Abou-Zahra Web Accessibility Specialist for Europe | Chair & > Staff Contact for the Evaluation and Repair Tools WG | World Wide Web > Consortium (W3C) http://www.w3.org/ | Web Accessibility > Initiative (WAI), http://www.w3.org/WAI/ | WAI-TIES Project, > http://www.w3.org/WAI/TIES/ | Evaluation and Repair Tools WG, > http://www.w3.org/WAI/ER/ | 2004, Route des Lucioles - 06560, > Sophia-Antipolis - France | Voice: +33(0)4 92 38 50 64 Fax: > +33(0)4 92 38 78 22 | >
Received on Monday, 25 September 2006 13:54:09 UTC