Abstract: The present invention relates to a method of storing data records produced from monitoring interactions between external agents and a system. The method comprises defining specific interactions that can occur between the external agents and the system as potential events of interest. A chain of interactions occurring during respective interaction sessions between a respective external agent and the system are monitored and potential events of interest occurring in the said chain are determined. Data records from the monitored chain of interactions are produced, the respective data record including data identifying determined potential events of interest and data associated therewith. A profile identity, representative of the external agent, is assigned to each data record produced during a said interaction session.