e { content: 'tcl'; }
  pre.src-tex:before { content: 'TeX'; }
  pre.src-plain-tex:before { content: 'Plain TeX'; }
  pre.src-verilog:before { content: 'Verilog'; }
  pre.src-vhdl:before { content: 'VHDL'; }
  pre.src-xml:before { content: 'XML'; }
  pre.src-nxml:before { content: 'XML'; }
  /* add a generic configuration mode; LaTeX export needs an additional
     (add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
  pre.src-conf:before { content: 'Configuration File'; }

  table { border-coll