I've created a SGML DTD grammar for W3C HTML 5.1 validation at [1], and am in the process of adding 5.2. This is of course only for checking and normalizing HTM

I've created a SGML DTD grammar for W3C HTML 5.1 validation at [1], and am in the process of adding 5.2. This is of course only for checking and normalizing HTML the markup language, rather than a reference for Web APIs and browser behaviors. [1]: http://sgmljs.net/docs/w3c-html51-dtd.html http://sgmljs.net/docs/w3c-html51-dtd.html