List of @ids for table data and
header cells. (This attribute is based on and
intended to be converted easily to the XHMTL headers attribute.)
| Value | Meaning |
|---|
| One or more identifiers (IDREFS) | Points to (contains) a list of one or more IDs of rows and columns that supply header information. |
| Restriction: This is an optional attribute; there is no default. |