Rule: Do not nest layout tables

• The sequence of content (i.e. order) in the document code affects its meaning, nesting layout tables often makes the sequence of content less understandable.

Success Criterion 1.3.2 Meaningful Sequence

Other Related Success Criterion:

• Use CSS and web standards techniques for the coding of content, and the graphical styling and positioning of content.
• Avoid using table markup for graphical layout, if you do use tables for layout make sure the content still is meaningful when the table markup is disabled.
• Avoid using nested tables for layout, the deeper the level of nesting the more chance there of having a confusing sequence of content.
• Tables that are used for layout should use only tr and td elements, and the table, tr and td elements should have a role="none" attribute to clearly indicate the table markup is being used for layout.

• Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification: Visual formatting model
• F33: Failure of Success Criterion 1.3.1 and 1.3.2 due to using white space characters to create multiple columns in plain text content
• F49: Failure of Success Criterion 1.3.2 due to using an HTML layout table that does not make sense when linearized