8. The system of claim 1 , wherein the rule structure includes nodes that represent the segment identifiers and are connected by links that represent the relationship between the segment identifiers.
8. The system of claim 1 , wherein the rule structure includes nodes that represent the segment identifiers and are connected by links that represent the relationship between the segment identifiers. 9. The system of claim 8 , wherein the instructions configure the system to apply the rule structure by traversing a traversal path in the rule structure and identifying segments corresponding to the nodes along the traversal path.