Hi I like the use of OpenBoot like languages better than more natural languages like XML or such. My primary reason is that the Forth like languages are one of the few languages that syntax rules are simple enough that anyone ( with some programming skills ) can implement an interpreter. Also, the language is rich enough that one can even include various converters and even things like directory printout and file extractors inside the archive file it self ( with minimal overhead ). This is the concept of a postscript file. The file it self defines how to be printed with only a few initial primitives that directly correspond to printing. Without too much to go on, one could take the actual printout of a postscript file and the file itself and be able to determine the general rules for how do decode any postscript file. Kind of like the rosetta stone concept. We are talking about the maximum information in the smallest human readable form. Dwight