From OpenSCADAWiki
Commands with the parameters. Tag "comm"
<comm id="add">
<fld id="tm" tp="time"/>
<fld id="cat" tp="str"/>
<fld id="lvl" tp="dec" min="0" max="7"/>
<fld id="mess" tp="str"/>
</comm>
<comm id="add">
<fld id="tm" tp="time"/>
<fld id="cat" tp="str"/>
<fld id="lvl" tp="dec" min="0" max="7"/>
<fld id="mess" tp="str"/>
</comm>