10 Common Errors When Implementing Accessibility
By Trenton Moss2008-01-29
Don't use the table summary (unless it actually adds value)
The table summary can be inserted on to any HTML table and is essentially a summary of what the table is. Screen readers read aloud table summaries before reading through the table, providing them with a summary of the table content prior to listening to the whole table.
The table summary should always be omitted from a layout table. Websites using a tabular layout sometimes have table summaries of ‘layout table’ which of course add no value at all.
Even with data tables, a table summary is only needed if there's insufficient information provided about the table on the page (which isn't usually the case).
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