[Bug 27079] New: Clarify simultaneous implementatinon of MSAA + UIA and MSAA + IA2

https://www.w3.org/Bugs/Public/show_bug.cgi?id=27079

            Bug ID: 27079
           Summary: Clarify simultaneous implementatinon of MSAA + UIA and
                    MSAA + IA2
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML a11y APIs (editor: Steve Faulkner, Cynthia
                    Shelly)
          Assignee: faulkner.steve@gmail.com
          Reporter: dmazzoni@google.com
        QA Contact: sideshowbarker+html-a11y-api@gmail.com
                CC: mike@w3.org, public-html-admin@w3.org,
                    public-html-bugzilla@w3.org,
                    public-html-wg-issue-tracking@w3.org

How is a server supposed to simultaneously support MSAA + UIA Express and MSAA
+ IAccessible2 where the MSAA part differs?

As one example, the spec currently maps the HTML element ARTICLE to
ROLE_SYSTEM_GROUPING in the UIA column, but ROLE_SYSTEM_DOCUMENT in the IA2
column.

A user agent can only implement one COM object per node. The MSAA / IAccessible
part is shared; it can't change what it returns from get_accRole depending on
whether the client speaks UIA or IA2, because there's no way for it to know.

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Received on Thursday, 16 October 2014 15:39:26 UTC