24.3.2 Identifying row and column groups and header cells
§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 Positioning table footer rows (deprecated)
§24.3.2.6 Overriding row and column group settings
