html => {
         -start => qq~<table class="maintable"><tr><td><b>HTML:</b></td></tr>~.
             qq~<tr><td class="tableshcode">~,
             -end    => qq~</td></tr></table>~,
             -string => \&PBoard::Posting::HighlightHtml,
     },
     sql => {
         -start  => qq~<table class="maintable"><tr><td><b>SQL:</b></td></tr>~.
             qq~<tr><td class="tableshcode">~,
             -end    => qq~</td></tr></table>~,
             -string => \&PBoard::Posting::HighlightSql,
     },

     # different link types
     cpan => {
         -start =>
           '<a rel="external" href="http://search.cpan.org/search?query=',
           -end   => "</a> ",
           -string => sub {
               my $url = &HTML::Entities::encode_entities($_[0]);
               return $url . ';mode=all">CPAN: ' . $url;
           },
     },