1
A
B
end_child
end_parent
parent and child have content
2
A
B
end_child
child has content
3
A
B
end_parent
parent has content
4
A
B
parent has bottom border
5*
A
B
no content or borders
the case for 8.3.1.6.2
6
A
B
parent has top border
7*
A
B
parent and child have top borders
is this expected by the spec?