2. The method of claim 1 , wherein applying the rule structure includes comparing the lexical entry against a portion of the textual input, and wherein the rule structure includes multiple traversal paths.
2. The method of claim 1 , wherein applying the rule structure includes comparing the lexical entry against a portion of the textual input, and wherein the rule structure includes multiple traversal paths. 3. The method of claim 2 , wherein accessing a lexical entry comprises selecting the lexical entry from a plurality of lexical entries based at least in part upon meta data associated with the lexical entry, and wherein the multiple traversal paths include a path that links one of the multiple nodes back to itself.