A printer MUST support the values top, middle, and bottom for the valign attribute of the td, th, and tr elements
Tests for assertions 51, 52, 53, 54, 58
Table 3: Values of valign for tr
| Row 1 |
Top Middle Bottom |
valign=top |
| Row 2 |
Top Middle Bottom |
valign=middle |
| Row 3 |
Top Middle Bottom |
valign=bottom |