Structural approaches seek to uncover interrelationships between symbolic human behaviors. Database design involves classifying data and identifying interrelationships. As spatial interrelationships are key to this synoptic science, maps are a key tool. The interrelationships between exposures to chemicals and health effects are rather complex. Deities had complex interrelationships, which partly reflected the interaction of the forces they represented. This section defines these parameters and some of their interrelationships. In 1940 Theodore White published a hypothesis on the interrelationships between different plesiosaurian families. They also provide insight into the lives and interrelationships of parishioners. See Dinosaur classification for the detailed interrelationships between these. They can be applied to represent abstract data with irregular interrelationships. It also allows an analysis of business function interrelationships. As more carcharodontosaurids were discovered, their interrelationships became clearer. However, more work is required to fully resolve the interrelationships within "Carcharhinus". In 1959, Joseph Curtis Moore published a review of the interrelationships of the squirrels. Cladogram showing borophagine interrelationships, following Wang et al.