+ * Value processing can be controlled using the "filter chain" infrastructure
+ and "matches" and "targets". The following plugins are available:
+
+ - match_regex
+ Match values by their identifier based on regular expressions.
+
+ - match_timediff
+ Match values with an invalid timestamp.
+
+ - match_value
+ Select values by their data sources' values.
+
+ - target_notification
+ Create and dispatch a notification.
+
+ - target_replace
+ Replace parts of an identifier using regular expressions.
+
+ - target_set
+ Set (overwrite) entire parts of an identifier.
+