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Simplify Data Tables

Accessibility of data tables can be achieved by identifying table headers and defining whether they are row or column headers (for example, <th scope=”col”>). Complex tables (those that have more than one level of row or column header, or spanned data or header cells) can easily become too complex for screen reader users to comprehend even though markup may technically provide the necessary associations between data cells and headers. Consider a table where 3 or 4 or more headers are identified for each data cell; understanding the relationships between the data and the appropriate headers can be difficult for users, especially for users that cannot see the table. When possible, simplify or ‘flatten’ data tables so that there is no more than one row and column header for each data cell.

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