Data transfer object (DTO), formerly known as value objects (VO), is adesign pattern used to transfer data between software applicationsubsystems. DTOs are often used in conjunction with data access objects to retrieve data from a database.
Business objects (domain objects) are objects in an object-orientedcomputer program that represent the entities in the business domain that the program is designed to support. For example, an order entry program might have business objects to represent each order, line items, and invoices.Business objects are sometimes called domain objects; a domain model represents the set of domain objects and the relationships between them. A business object often encapsulates all of the data and business behavior associated with the entity that it represents.
Data Access Object (DAO) is an object that provides an abstract interface to some type of database or persistence mechanism, providing some specific operations without exposing details of the database. It provides a mapping from application calls to the persistence layer. This isolation separates the concerns of what data accesses the application needs, in terms of domain-specific objects and data types (the public interface of the DAO), and how these needs can be satisfied with a specific DBMS, database schema, etc. (the implementation of the DAO).
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).
Business objects (domain objects) are objects in an object-orientedcomputer program that represent the entities in the business domain that the program is designed to support. For example, an order entry program might have business objects to represent each order, line items, and invoices.Business objects are sometimes called domain objects; a domain model represents the set of domain objects and the relationships between them. A business object often encapsulates all of the data and business behavior associated with the entity that it represents.
Data Access Object (DAO) is an object that provides an abstract interface to some type of database or persistence mechanism, providing some specific operations without exposing details of the database. It provides a mapping from application calls to the persistence layer. This isolation separates the concerns of what data accesses the application needs, in terms of domain-specific objects and data types (the public interface of the DAO), and how these needs can be satisfied with a specific DBMS, database schema, etc. (the implementation of the DAO).
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).
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