Abstract: In an embodiment, a method of designing a schema to implement an object database system is provided. A first table type may be defined in the schema that may include a layout for an object table. The object table may define an instance of an object in the object data-base system. A second table may be defined in the schema that may include a layout of an object relations table. The object relations table may define a type of relation between instances of at least two objects in the object database system. Each of the instances of the at least two objects may be defined by a respective entry of the object table.