General HTML5 question

[trishtren]

Hey, i was looking at a number of HTML 5 game ide's such as game maker, game salad and scirra construct. They often mention having a HTML 5 compiler.
I was contemplating how to create one as i have experience writing a basic assembly language compiler. However i was wondering where to begin with something like html, is it just a parser and lexer without the need to generate machine code? If so why do they constitute something that just checks format and layout as a compiler?
Does the mentioned software above just generate html5 blocks into a file and then check its syntax etc?

[DarrylBurke]

Moved from Web Frameworks. What made you think that was the right place to post this? It's not even a Java question.

db