Comparison tables are used to present information for two or more items or versions, often identifying the differences between the items via row highlighting or other visual indicators. One objective is to present the information in such a way that preserves the relationships within the information even when users cannot see the table or when the presentation format is changed. Information is considered tabular when logical relationships among the text, numbers, images, or other data exists in two dimensions (vertical and horizontal). These relationships are represented in columns and rows, and the columns and rows must be recognizable in order for the logical relationships to be perceived. This document provides requirements and recommendations for markup and styles, as well as accessibility information and considerations.
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