Table accessibility

The practice of structuring data tables so they can be understood by assistive technology users. Accessible tables require proper markup that distinguishes header cells from data cells, establishes relationships between headers and the data they describe, provides captions or summaries, and avoids using tables purely for visual layout. In PDF documents, tables must be tagged with appropriate structure elements (TH for headers, TD for data cells) so screen readers can announce the context of each cell. Complex tables with merged cells, multiple header rows, or nested structures require additional attention to ensure the logical relationships are preserved for non-visual access.