I am not very familiar with the ATK/AT-SPI implementations but I am aware that these implementations are not compatible with the KDE architecture, and a general move to DBUS has been often mentioned. The GNOME Mobile & Embedded Initative could be the opportunity to implement ATK / AT-SPI over DBUS and finaly offer a general solution.
Please be aware that moving into dbus might be a very hard task. Currently GNOME has a working a11y architecture while KDE has none. Do we want to move to an non existant architecture from one that works actually really well? ariel
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