To add a header row to the table, underline the first row with a sequence of "-" (minus) characters. Note that the underlining line must not interrupt the vertical dividers. Underline each header cell separately, as in the following example.
<table>
Header Cell 1 Header Cell 2 Header Cell 3
------------- ------------- -------------
Data Cell 1 Data Cell 2 Data Cell 3
Data Cell 4 Data Cell 5 Data Cell 6
</table>
Depending on the output format the table appears as follows:
