I'm enjoying finally meeting someone to challenge my claims ;) I haven't published my test scripts yet (they're not very exciting and just extract test data and

I'm enjoying finally meeting someone to challenge my claims ;) I haven't published my test scripts yet (they're not very exciting and just extract test data and add a DOCTYPE anyway), but for the time being you can just follow the instructions given in the tutorial I linked to see whether the cases you're concerned about are covered (the tutorial also explains how to deal with other common HTML parsing issues). Nb: "<!--" in script element content isn't a problem for parsing as such and was just used to stop browsers rendering JavaScript code text during the introduction of JavaScript back in 1995 or so (see also [1] mentioning the consequences for treating script content as CDATA or #PCDATA). Predefined HTML entities are also fully supported by the WebSGML revision of SGML. Don't know about "foster-parenting", but SGML has very specific rules for tag inference to accomodate elements not allowed at a given context so I'm assuming you're referring to that (also described in detail in the linked paper below). [1]: http://sgmljs.net/docs/html5.html#script-data http://sgmljs.net/docs/html5.html#script-data