Provides constants TRUE and FALSE to be used as conditions, as well as miscellaneous features: printing, alarm, logging and Java system property setting. Also provides a "date_ms" variable that gives the current date as the number of milliseconds elapsed since 1st January 1970 GMT (syntax: ${common_plugin_id:date_ms}). A custom-formatted date can be obtained with variable "date!myDateFormat", where myDateFormat follows the Java java.text.SimpleDateFormat specification. A condition which is always true. A condition which is always false. Prints a string on standard output Prints a string on error output Generates an alarm with the given message Sets a Java system property. Sets timezone for variable 'date'. The timezone parameter may be filled a number of ways: either an abbreviation such as "PST", a full name such as "Europe/Paris", or a custom ID such as "GMT+1:00". Leave this parameter empty to get the default timezone as configured on the host. Generates a pseudo action/request report for custom logging purpose.