It is important in any data replication environment to capture and manage events such as Trail records containing specific data or operations, or maybe the occurrence of a certain error. These are known as Event Markers.
GoldenGate provides a mechanism to perform an action on a given event or condition, these are known as Event Actions and are triggered by Event Records. If you are familiar with Oracle Streams, Event Actions are like Rules.
An Event Record can be either a trail record that satisfies a condition evaluated by a
FILTER clause, or a record written to an event table enabling an action to occur. Typical actions are to write status information, report errors, ignore certain records in a trail, invoke ...