I'm not sure I really follow you here.  Any xhtml written for publishing is going to play appear perfectly fine on the webview.  The webview though is specifically for web browsers though, and is written in HTML5, not XML/XHTML.  We don't even conform to the entire polyglot spec anyway, since, at first glance, we don't follow the namespacing rules.

Additionally, the `noscript` tag is part of HTML5 (and older versions) and is designed specifically to provide a message to browsers that don't have JavaScript enabled, which is the entire point of this feature.  It also appears in only one place (in `index.html`).

It just seems like you're raising an issue that doesn't exist.