This package provides a binding mechanism between off-the-disc contents (additional contents on local storage) and the corresponding on-the-disc contents (BD-ROM contents), which enables a seamless user experience to playback media data, regardless of the origin of the data.

This package contains the VFSManager with the API to construct or cancel the VFS binding, the VFS permission control class, and other VFS related classes or interfaces.

Signed applications can manage these additional contents, by providing new file structures that are integrated with the optical disc's filesystem to produce a new, read-only file system. The structure of these files is specified in the BD-ROM specification. As with the original filesystem pressed on to a BD disc, it is expected that this filesystem will be created using an authoring tool; the implementation details of creating such files should not be of interest to typical applications programmers, and is not specified in this API documentation.