rowspan
Row Span (NISO JATS table model)
Table attribute used to request vertical spanning by naming the number of rows a cell spans in a vertical span. (This attribute is based on and
intended to be converted easily to the XHTML rowspan 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> ...