How can Array entities be described?

Array entities are best described as sets of references to another entity. In the context of data modeling, an array entity allows for the organization of multiple instances or occurrences of a related entity within a single data structure. This is particularly useful for representing relationships where one entity can be associated with multiple instances of another entity.

For example, consider a scenario where a customer can have multiple policies. In this case, the customer entity can have an array of references to the policy entity, effectively allowing the customer to be linked to several policies simultaneously. This structure supports the establishment of one-to-many relationships in a database effectively.

The understanding of array entities as collections of references is instrumental for managing complex data relationships within systems like Guidewire, where managing insurance policies and related data is critical. This is why referring to array entities as sets of references captures their primary function and utility in relational data design.