Is that so? After all, XML has Schema as well, and with XML you can have task-appropriate schemas. Look, it's all S-expressions, and Lisp is certainly better

Is that so? After all, XML has Schema as well, and with XML you can have task-appropriate schemas. Look, it's all S-expressions, and Lisp is certainly better than XSLT/XPath, so, sure. But there's a whole ecosystem around XML for this sort of usage that there isn't for Lisp. OTOH, Lisp is a general purpose language that lets you build DSLs as needed, so there's that advantage.