-$extra_columns[]=array('tagname'=>'sitename', 'header'=>'SN', 'type'=>'string', 'title'=>'Site name', 'fetched'=>true);
-$extra_columns[]=array('tagname'=>'domain', 'header'=>'DN', 'type'=>'string', 'title'=>'Toplevel domain name', 'fetched'=>true);
-$extra_columns[]=array('tagname'=>'ipaddress', 'header'=>'IP', 'type'=>'string', 'title'=>'IP Address', 'fetched'=>true);
-$extra_columns[]=array('tagname'=>'fcdistro', 'header'=>'OS', 'type'=>'string', 'title'=>'Operating system', 'fetched'=>false);
+$extra_columns[]=array('tagname'=>'sitename', 'header'=>'SN', 'type'=>'string', 'title'=>'Site name', 'fetched'=>true, 'source'=>'myplc');
+$extra_columns[]=array('tagname'=>'domain', 'header'=>'DN', 'type'=>'string', 'title'=>'Toplevel domain name', 'fetched'=>true, 'source'=>'myplc');
+$extra_columns[]=array('tagname'=>'ipaddress', 'header'=>'IP', 'type'=>'string', 'title'=>'IP Address', 'fetched'=>true, 'source'=>'myplc');
+$extra_columns[]=array('tagname'=>'fcdistro', 'header'=>'OS', 'type'=>'string', 'title'=>'Operating system', 'fetched'=>false, 'source'=>'myplc');
+$extra_columns[]=array('tagname'=>'uptime', 'header'=>'UT', 'source'=>'comon', 'type'=>'sortAlphaNumericTop', 'title'=>'Continuous uptime until now', 'fetched'=>false);
+$extra_columns[]=array('tagname'=>'date_created', 'header'=>'DA', 'source'=>'myplc', 'type'=>'date', 'title'=>'Date added', 'fetched'=>false);
+//$extra_columns[]=array('tagname'=>'hopcount', 'header'=>'HC', 'source'=>'tophat', 'type'=>'sortAlphaNumericTop', 'title'=>'Hop count from reference node', 'fetched'=>false);
+