normal table

1 2 3
4 5 6
7 8 9

table with headers

1 2 3 4
5 6 7 8
9 10 11 12

table with nested tables

1 2
11 12
13 14
3

table with nested table with non-direct child

1 2
11 12
13 14
3

table with deep-nested tables

1 2
11 12
404 405
406 407
14
3

table with colspan

1 2
3

table with rowspan

1 2
3 4
5