Column Groups
| ABC |
DEF |
GHI |
JKL |
MNP |
| 12 |
24 |
36 |
1242812428 |
1262012620 |
| 36 |
72 |
98 |
14442814428 |
1062010620 |
Allowed grouping elements:
<colgroup span="5" /> table has 5 columns in one group
<colgroup span="3" /> table has 5 columns in two groups
<colgroup span="2" />
<colgroup> table has 5 columns in one group with first two columns
<col span="2" /> styled differently from last three
<col span="3" />
</colgroup>
<col span="2" /> table has one implied group of 5 columns with
<col span="3" /> first two columns styled differently from last three
