Identity in the object model is either a run-time reference or persistent unique ID (termed an OID). In the relational world, primary keys define the uniqueness of a data set in the overall data space ...

Object databases are also suited for applications that are not necessarily based on an object model, but use a large number of in-memory indexes that are difficult to store in a relational database.

In addition, PowerDesigner supports virtually every notation available, including the popular UML and IDEF1X notations.Heck, PowerDesigner even supports CODASYL, a notation that I used when I started ...

Data modeling is the process of defining datapoints and struc­tures at a detailed or abstract level to communicate information about the data shape, content, and relationships to target audiences.

See object-oriented DBMS. OOP Traditional Programming class define data + processing object data + processing attribute data ... Relational vs. Object Modeling Instead of separate employee, ...