scope Scope

Specifies the set of data cells for which the current header cell provides header information, for example, the rest of the row group that contains it
OPTIONAL on elements: <td>, <th>
Value Meaning
col Provides header information for the rest of a column
colgroup Provides header information for the rest of a column group (i.e., the remaining cells within the <colgroup> element)
row Provides header information for the rest of a row
rowgroup Provides header information for the rest of a row group (i.e., the remaining cells of the current <thead>, <tfoot>, or <tbody>)
Restriction This attribute may be specified if the element is used.