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H45 Example 1: Using `longdesc`

a complex chart

Windows 7, Firefox ESR 45.4.0, and JAWS 17
- Result: Screen reader announces graphic a complex chart. Press alt + enter for long description.
iOS 10.2.1, Safari browser is based on the iOS version, VoiceOver on iPad
- Result: There is no way to read longdesc and no way to tell that it is a longdesc. iOS VoiceOver annouces a complex chart image, end main.
Android 7.1.2; Pixel, Chrome 55.0.2883.91, and TalkBack Version: 5.0.4.3.
- Result: TalkBack announces complex chart. There is no way to read longdesc and no way to tell that it is a longdesc.

H45 Example 1: Using longdesc