> If we want a different suffix for embedded lyx files why not to call them > .elyx?
I am not in favor of a separate file extension partly because of the extra work (document, .cpp etc). If it is decided to use one, I would prefer .lyz. 'z' is after 'x', it means 'compression', and '.lyz' actually sounds like '.lyx'. Remember, if you have file.lyz and file.lyx in the same directory, unpacking file.lyz will overwrite file.lyx. You also have to decide if you want to save file.lyx along with file.lyz if you edit file.lyx and then enable embedding. A single extension is easier to understand. Bo