abbr Abbreviation (NISO JATS table model)

An abbreviated version of the cell’s content. This allows visual browsers to use the short form if space is limited, and non-visual browsers can give a cell’s header information in an abbreviated form before rendering each cell. (This attribute is based on and intended to be converted easily to the XHMTL abbr attribute.)
OPTIONAL on elements: <td>, <th>
Value Meaning
Text, numbers, or special characters A brief note of what is in the cell, mostly for use by accessibility software.
Restriction This attribute is an optional attribute; there is no default.