colspan
Column Span (NISO JATS table model)
Table attribute used to request horizontal spanning of more than one column. (This
attribute is based on and intended to be converted easily to the XHMTL
colspan attribute.)
Remarks
Example
... <tr> <th/> <th colspan="3" align="center" rowspan="1">Institutional care</th> <th align="left"/> <th colspan="2" align="center" rowspan="1"> Bed use (days)</th> </tr> ...