X11 Inter-Client Exchange library (development headers) This package provides the main interface to the X11 Session Management library, which allows for applications to both manage sessions, and make use of session managers to save and restore their state for later use. This package contains the development headers for the library found in libsm6. Non-developers likely have little use for this package. More information about X.Org can be found at: <URL:http://xorg.freedesktop.org> <URL:http://lists.freedesktop.org/mailman/listinfo/xorg>