Nope, at least in my case the HTML is not Lisp-generated, but hand-written. I use the templating way where occasionally I insert server-side Lisp code in what i

Nope, at least in my case the HTML is not Lisp-generated, but hand-written. I use the templating way where occasionally I insert server-side Lisp code in what is otherwise mostly mark-up. Of course it is not "something about Lisp". The HTML is always generated by a human, either "manually" (as in my template library) or automatically (as in CL-WHO or home-grown s-expression-to-HTML macros). But you're right, it's not a big deal. What matters is the browser and the user, not the W3C :)