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From Wikipedia, the free encyclopedia

Data Transfer Object (DTO), formerly known as Value Objects or VO, is a design pattern used to transfer data between software application subsystems. DTOs are often used in conjunction with Data Access Objects to retrieve data from a database.

The difference between Data Transfer Objects and Business Objects or Data Access Objects is that a DTO does not have any behaviour except for storage and retrieval of its own data (accessors and mutators).

The Value Object pattern in Domain-driven design is not the same as the DTO pattern.

[edit] External links

• Core J2EE Patterns - Transfer Object
• Core J2EE Patterns - Data Access Object
• Abuses of DTO pattern in Java World
• Data Transfer Object - Microsoft MSDN Library