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An artificial class is a class solely created for technical reasons.
Artificial classes are not meaningful concepts outside the software.
Note that it's not merely the identifier which makes a class artificial. A class
DatabaseQuerySender is artificial. The name tells that this is an abstraction on code which sends queries to a database. The abstraction comes from the code, from the solution instead of the problem. Classes
Database and also
DatabaseConnection are natural classes. They are meaningful concepts outside the software. However, relabeling
Database does not make it a natural class if the abstraction it stands for is not changed accordingly. A solution which is ML-compliant would rather distribute the functionality of the
DatabaseQuerySender to the classes
Discuss this wiki article and the term on the corresponding talk page.