The Get Event Property activity has four activity attributes:
Event--choose the item attribute of type event that contains the event message from which you want to retrieve a property.
Property--the event property whose value you want to retrieve. This attribute takes as its value a lookup code from the Event Property lookup type. Possible values are "Priority," "Send Date," "Receive Date," "Correlation ID," "Event Parameter," "Event Name," "Event Key," "From Agent," "From Agent Name," "From Agent System," "To Agent," "To Agent Name," and "To Agent System." See: Event Message Structure, Oracle Workflow API Reference.
Event Parameter--if you choose the Event Parameter property in the Property attribute, enter the name of the parameter whose value you want to retrieve. Oracle Workflow uses this name to identify the parameter within the event message's parameter list. If you choose any property other than Event Parameter, leave this attribute blank.
