# Comprehensive rules example showing everything
 # {
 #      hosts => ['perl-re','perl-re','perl-re'],
+#       host_groups => [ 'group1','group2','group3'],
 #      services => ['dns','cpu','local'],
 #      exclude_hosts => ['.*mktu','chr.*'],
 #      exclude_services => ['disk','dns','misc'],
+#       exlcude_host_groups => ['group1','group2','group3'],
 #      times => [ 
 #              { days => ['0','1-3','4-5'],
 #                times => ['06:30-18:30','21:00-22:00'] },