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PackageKit D-Bus Abstraction Layer

PackageKit uses an abstraction layer to allow a session user to manage software packages in a secure way. This abstraction layer is based on D-Bus. Essentially, it is a set of APIs exported through a D-Bus interface. Glib, qt and python and other language bindings are available. This abstraction layer enables applications to perform high-level package operations such as add or remove a package without having to know much about package management. PolicyKit (AKA PolKit) is incorporated to provide a fine grained policy mechanism for users. D-Bus has two connections types (buses): System and Session. System interfaces normally run as