Qt provides several classes for DBus communication.
Extended DBus for Qt provides the following main additional features to the
DBus provides a Properties Interface which specifies a PropertiesChanged
signal whose reception is not implemented in the properties bridge by
QtDBus. Extended DBus for Qt provides it.
The DBus Properties Interface also specifies a GetAll method not implemented
in the standard QtDBus. Extended DBus for Qt provides it.
QtDBus properties mechanism is completely synchronous. Extended DBus for Qt
provides an additional asynchronous alternative.
An alternative and very simple cache mechanism is also implemented in
Extended DBus for Qt so the DBus traffic is reduced to the minimum.