Hello, Rochdi Badis!

Look this link, it may help.

This may help. I got in /csp/docbook.

Note the use of colspan in the <td> and <th> definitions. <td> and <th> support colspan and rowspan
attributes. Each attribute accepts a number as a value and causes the content of its parent <td> or <th> to span that number of columns or rows in the header or footer. Each produces output similar to the HTML attributes of the same name, but do so equally well for XHTML or PDF output formats.

Hi, Michael!

Try

#($$$displayString)#