An Item represents all the Agent Events that relate to a single business object.
An individual business object, such as an order, is made up of multiple messages that are put onto a network or application by the parties involved, such as Customers, Brokers, Exchanges etc. When a probe passes a message to an Agent, the Agent creates an Agent Event containing all the attributes for that message.
VMX-Analysis groups - or correlates - all Agent Events for a single business object into an Item.