And to be reminded : a lot of user put table / div etc ... in question text (or help) sometimes in answer too.

Still error with h3 in group title : template specific

Have error on index : core issue

nav is used by default by bootstrap

about sections :
Heading content: Text-only labels for sections of content. In the absence of sectioning content tags, the presence of a heading tag will still be interpreted as the beginning of a new content section..

maybe we could use "sections" tag for the groups, and article tags for questions?

If you use nav : yes
If not : no

Fo the h3 : it's a template issue, h4 is OK now.

I just checked google form. They are using div for absolutely everything (include for labels, titles, etc)...
Once upon a time, Google were the most exigent for semantic and accessibility....

They don't use aria-labelled-by ?

I didn't seen some for now.
They rather use "role" for everything.

role do the trick too for some part. Can you provide a google form example ?

Updated picture from the last GIT version.

1st : we don't have an h1 in page : i think we must add it everywhere (template issue)
2nd : group title is in h3 : This must be fixed (etmplate issue)
3rd: index add an h2 : core issue : we are unsure we have an h1
4th : the last h4 is from boostrap modal. We are unsure we have an h3.
5th : nav without head (nav is an HTML5 element, and it's the only html5 element here).

See answer_html branch.