1. A computer implemented method for evaluating one or more rules that pertain to an event having a string attribute, said method comprising the steps of: providing a rule trie comprising a number of nodes, wherein one or more match conditions must be met to trigger a given rule, and each match condition corresponds to a different node of the rule trie; providing a string attribute trie for the string attribute, wherein the string attribute trie includes a node sequence that is associated with a particular value that is a match condition of a particular node of the rule trie; configuring a link between a specified node of the node sequence of the string attribute trie, and the particular node of the rule trie; responsive to receiving the event, extracting the string attribute from the event, wherein the extracted string attribute has a value; comparing the value of the extracted string attribute with the associated value of the node sequence, by traversing a path that extends along the node sequence; and responsive to determining that the value of the extracted string attribute and the associated value of the node sequence are the same, using the configured link to send notice that the match condition of the particular node of the rule trie has been met by the extracted string attribute of the received event.