Use of group within list is unclear

[JAWS-test]

Neither the definition of the roles list, listitem and group nor the definition of aria-level in the specification contains any indication of how nested ARIA lists are created. Is the use of group sufficient or is aria-level required? If there is an element with role=group in role=list, this could be used to group or nest the list entries...? Unfortunately, the specification makes no statement about this.
Therefore I would like to know how

<ul><li>...<ul><li>...</ul></ul>

is marked in ARIA. I would also suggest changing the specification so that it becomes clear.

[JAWS-test]

Just to let you know what the output of JAWS 2019 (e.g. with IE 11 and in Chrome) of ARIA lists is like:

The following roles are not output as nested lists (specified in the order of their nesting in the source code)

• list - group - listitem
• list - listitem - group - listitem
• list - listitem with aria-level
• list - listitem - listitem

The following elements are output as a nested list

• list - list - listitem
• list - listitem - list - listitem
• list - listitem - group - list - listitem (with additional output of the group)

So this seems to be quite a mess, while for HTML it is clearly specified how nested lists must be marked.

[joanmarie]

Making 1.2 for now and asking APG TF to look into.

[sh0ji]

I haven't been able to find any instance where it made any meaningful difference to use group instead of list in my research and support the notion to remove it here.

[jnurthen]

See dequelabs/axe-core#1200 for more discussion on this