Unified Modeling Language (UML)Class diagrams describe the logical structure of a database system.

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Class diagrams in UML depict the logical structure of a software system, not necessarily a database system. They are used to represent the classes, interfaces, and their relationships in the system. However, UML does have specific diagrams for data modeling, such as the Entity-Relationship Diagram (ERD).

Unified Modeling Language (UML)Class Diagrams Describe the Logical Structure of a Database