Virt-df is a df implementation for virtual guests. The program is meant to be run on the host or dom0 to display disk space used and available on all partitions within all guests. There is no need to run any software or agent inside the guests. It is compatible with most Linux and Windows guests.
The Logic File System enables the user to access files through an additionnal mountpoint, /lfs, where powerful logic queries can be issued and navigation can be done through different dimensions, like date, size, or extension. For instance, LFS allows the user to perform the following commands in the shell: "cd /lfs/ext:mp3|ext:ogg/year:1973/genre:Disco/" and "ls artist:BeeGees/ artist:DonnaSummer/ artist:Chic/".
OCaml Batteries Included serves the following purposes: define a standard set of libraries that may be expected on every compliant installation of OCaml, organize these libraries into a hierarchy of modules with one source of documentation, and provide a consistent API for otherwise independent libraries.