Data Modeling
Data Modeling is the process by which a model of data is constructed using a specific form of diagram, or “model.” Such graphical representations display the data in terms of relationships to each other (Entity Relationship Diagrams, or ERDs), Object Relationship Diagrams (ORDs), Ownership Models, and many more.
The technique is usually the domain of a Database Adminstrator and is usually broken into two distinct phases or approaches: a Logical Model and a Physical Implementation Model. The logical model represents the data as seen by its users, while the physical model is used to implement the database within a specific database tool such as ORACLE or MySQL.
