A complex network is also a collection of records and relationships, but the relationships are many-to-many instead of one-to-many. The relationship between students and classes is a complex network. An occurrence of this relationship can be seen in Figure H-16, and the general schematic is in Figure H-17.
We saw earlier that we can use linked lists and indexes to process records in orders different from the one in which they are physically stored. We can also use those same data structures to store and pro-cess the relationships among records.