I don't understand what "the intended purpose of the suggested function" is; another implementation of @TRUENAME? But the help text seems to imply that @PATH has something to do with the filesystem. I'm pretty sure that it doesn't. @PATH is just a string-parsing function: strip out any quotes, then delete anything after the last (back)slash. You could use it e.g. to pull a key name out of a fully-qualified registry value name.