Correlation IDs are special Capture Attributes which are used to group together, track and analyse, individual transactions as they are seen at different agent points. The primary correlationID must be unique for a transaction (and is therefore commonly created by a combination of date, session and transactionID fields). Correlation IDs may be provided to VMX-Capture in all messages for the business object, or VMX-Analytics can create a synthetic Correlation ID for Agent Events using another correlation strategy.