ARIA processing in host langauges

In section 7. Implementation in Host Languages of WAI-ARIA 1.0
It states that

"User Agent processing for roles is defined in the WAI-ARIA User Agent
Implementation Guide<http://www.w3.org/TR/2010/WD-wai-aria-implementation-20100916/>[
ARIA-IMPLEMENTATION <references#ref_ARIA-IMPLEMENTATION>]." [1]

while for aria-* attributes it states:

"When these attributes appear in a document instance, the attributes will
be processed as defined in this specification." [1]

Why are the processing rules defined in the UA gudie for role, but not for
aria-* ?


[1] http://www.w3.org/TR/wai-aria/host_languages#host_general_role
[2] http://www.w3.org/TR/wai-aria/host_languages#host_general_attrs

-- 
with regards

Steve Faulkner
Technical Director - TPG

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