. . . . . . . . . . . . . . . . . . "Comparison of object database management systems"@en . . . . . . . . . . . . . . . . . . . "12912603"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "8439"^^ . . . . . . . . . . . "This is a comparison of notable object database management systems, showing what fundamental object database features are implemented natively."@en . . . . . . . . . . "1122853079"^^ . . . "This is a comparison of notable object database management systems, showing what fundamental object database features are implemented natively."@en . . .