Organization of the records is as a collection of trees,
rather than arbitrary graphs.
Figure 1.5 shows a sample hierarchical database that
is the equivalent of the relational database of Figure 1.3.
Figure 1.5: A sample hierarchical database
The relational model does not use pointers or links, but relates records
by the values they contain.
This allows a formal mathematical foundation to be defined.
Page created and maintained by Osmar R. Zaï ane Last Update:
Sun Sep 10 16:58:49 PDT 1995
