24.3.2 Identifying row and column groups and header cells

In this section:

§24.3.2.1 Using browser-dependent HTML tags for tables

§24.3.2.2 Designating table header cells

§24.3.2.3 Enumerating table column groups

§24.3.2.4 Wrapping table row groups

§24.3.2.5 Overriding row and column group settings