I recently read an article about the donation, "IBM beats Microsoft over the head with its own code" which took a kernel of a fact -- that IA2 is an extension of Microsoft Active Accessibility (MSAA), a Microsoft-developed technology -- and in the interest of simplifying it for his readership, made a few mistaken conclusions about it.
Let me clarify by saying IAccessible2 is an accessibility API, which you can add to your MSAA enabled Windows application, to provide additional accessibility features needed to handle rich internet applications, rich text, and documents - in this case ODF. IAccessible2 in no way modifies MSAA. Microsoft has made MSAA available to industry as as a standard accessibility API for Windows and modifying it would break interoperability with assistive technology. Furthermore, Microsoft made MSAA available for all to use on Windows. IAccessible2 is derived from work we did on Java Accessibility and the UNO Accessibility API (which I discuss in an earlier blog entry). It is in no way derived from Microsoft work.
IAccessible2 does not just support screen reading. Accessibility features of IAccessible2 also assist alternate input solutions for people with mobility impairments. IAccessible2 also provides support for screen magnification solutions. AI Squared, developer of the industry leading ZoomText screen magnifier, provided valuable feedback in IAccessible2's design as well for this reason.
One of my functions is to co-chair the ODF Accessibility Subcommitee in OASIS. The accessibility subcommittee is pleased to see the article recognize our accomplishment in making ODF accessible and our recent work called “Accessibility Guidelines for Implementations of Open Document Format v1.1.”