I have seen a website that has a doctype of
<!DOCTYPE html>
This website uses HTML Tags that I have never seen before like <section>
.
My Question:
1.) Is this kind of "generic Doctype" recommended for a normal website? (I've never seen this this before, what are the pro and cons?)
2.) When is it valid to use such "self defined" HTML Tags? Is this valid with this doctype Declaration?