When the type attribute is XPATH, the value attribute has an XPath used to evaluate its value from the incoming event. You can specify a formatter (a Java class, which is accessible through classpath) to format the value returned through the XPath evaluation.
Typical use cases for a formatter are:
Format a collection of nodes into a string
Format a Date into a different format
Format a Map into a string
<Transform eventName="DeviceDeleteEvent"> <Property name="deviceName" type = "XPATH" value = "/VoyenceEvent/Device/DeviceDeleteEvent/DeviceId/OID"/> </Transform>