Eric I dream of a tool which will tell me what obscure (or not so obscure) data structuring format something is stored in just by copy-pasting in the file contents. This would be very useful when a custom file-ext is being used (eg. saveGames). This tool probably already exists in multiple forms, right now I'm trying to figure something which looks like JSON & XML at once.

Mark Dain Sounds like file(1) to me? "file <filename>" will determine (with disturbing accuracy) what kind of file it is. Here's the man page: linux.die.net/man/...