This is a legacy framework module, describing the GUI for AOO application.
see: https://wiki.openoffice.org/wiki/Framework/Article/Implementation_of_the_Dispatch_API_In_SFX2#Items_and_UNO_structs
https://wiki.openoffice.org/wiki/SFX2_Refactoring
https://docs.libreoffice.org/sfx2.html