True, but it could be turned into executable Lisp code without much effort. As could a XML format version of it.<p>Besides, square brackets is the most common representation of lists. It&#x27;s difficult to find round brackets denoting lists outside of Lisp and dialets. I doubt that&#x27;s a coincidence.<p>Given that Apple already uses Scheme in its sandbox implementation [1], it wouldn&#x27;t be too outlandish to assume those are related somehow. The notation is a bit off, but it&#x27;s nothing a few macros wouldn&#x27;t solve.<p>[1] <a href="http:&#x2F;&#x2F;lemonodor.com&#x2F;archives&#x2F;2007&#x2F;10&#x2F;sexprs_in_leopard.html" rel="nofollow">http:&#x2F;&#x2F;lemonodor.com&#x2F;archives&#x2F;2007&#x2F;10&#x2F;sexprs_in_leopard.html</a>