The HTML Living Standard (sometimes informally called HTML5). The HTML specification has been a living document without version numbers since 2011
. It includes both HTML, the core markup language for the web, and a number of related APIs.
HTML Standard, Edition for Web Developers
Always choose WHATWG over W3C, no exceptions. Here’s why.
W3C forks HTML yet again - Anne's Blog
전쟁이 끝나고 지금은 통합되어서 WHATWG주관 하에 발전되는 중.
https://stackoverflow.com/questions/6825713/html5-w3c-vs-whatwg-which-gives-the-most-authoritative-spec