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Bug 29033 - No mapping for the optimum region of <meter>
Summary: No mapping for the optimum region of <meter>
Status: NEW
Alias: None
Product: HTML WG
Classification: Unclassified
Component: HTML a11y APIs (editor: Steve Faulkner, Cynthia Shelly) (show other bugs)
Version: unspecified
Hardware: PC Windows NT
: P2 normal
Target Milestone: ---
Assignee: steve faulkner
QA Contact: HTML a11y API spec bugbot
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-08-05 22:13 UTC by Cynthia Shelly
Modified: 2015-08-05 22:13 UTC (History)
4 users (show)

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Description Cynthia Shelly 2015-08-05 22:13:11 UTC 
The optimum region is expressed with color in browsers, which means that this feature cannot currently be used without violating WCAG 1.4.1 Use of Color 

We need a way to express the optimum, sub-optimum, sub-sub-optimum via accessibility APIs.

In UIA, we propose to do this by adding the Value pattern in addition to the specified RangeValue pattern.  The numberic value of the meter would continue to be stored in RangeValue:Value and the optimum state would be stored in Value:Value as Good, Fair, Poor.


WCAG 1.4.1 http://www.w3.org/TR/WCAG20/#visual-audio-contrast-without-color

HTML-AAM Meter http://w3c.github.io/aria/html-aam/html-aam.html#el-meter

HTML meter element optimum point http://www.w3.org/TR/html51/semantics.html#the-meter-element:the-meter-element-7