outputs are also called "actions"
rulesets and rules
%propname:fromChar:toChar:options:fieldname%
templates(parameters) {list-descriptions}
logrotate软件包
logger可以产生相应的log输出，tag可以区分，programname是tag的static部分，httpd12345，httpd是static部分
原文：http://www.cnblogs.com/starfuxks/p/3616497.html