New Requirements

New DB languages must be able to handle:

• type extensibility;

• multiple collections types (eg. sets, lists, trees, arrays);

• nesting of type constructors;

• large objects (eg. text, sound, image);

• unstructured data;

• temporal & spatial data;

• encapsulation and methods;

• active rules;

• object identity.

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New database languages must be able to handle: user-defined data types, multiple collection types, arbitrary nesting of type constructors such as a vector of sets, large objects, unstructured scientific data, temporal and spatial data, abstract data types and behavior encapsulation through methods, active rules, and object identity.