[Accessibility-ia2] IAccessibleValue for unknown values

[David Bolter]

  Hi all,

What is recommended when a particular value is unknown? For example, a 
spinner might not have a known maximum value (indeterminate). What 
should be exposed via IAccessibleValue::maximumValue for this case?

Note it would be nice to differentiate between indeterminate, unknown, 
and 0.

cheers,
David
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