header test

PASS if header element maps to one of the following:

MSAA + UIA Express role

MSAA + IAccessible2 role and

other IAccessible2 features

 ATK/AT-SPI role

Mac OS X

AXRole
AXSubrole
AXRoleDescription
Expose as text string in AriaRole IAccessible2: Object attribute xml-roles:banner Object attribute xml-roles:banner AXGroup
AXLandmarkBanner
'banner'

FAIL otherwise.