A common event format associated with unique index value is provided to allow a common structure to rules, regardless of from which system the message is originating. Messages coming from different sources into an enterprise manager are tokenized to contain essential information, and standardized into a common event format. Each token is then assigned an index, referred to as an alert index. This index may be a unique identifier that corresponds to a set of alerts having common token values or attributes, or a unique index for a particular alert. This alert index is then used to facilitate the identification and handling of the various events generated by various sources.