| 摘要 |
PROBLEM TO BE SOLVED: To provide a mapping method capable of executing mapping between an object model and a relational model without changing the relational model even when the object model is changed. SOLUTION: In this mapping method, a part of attributes in a certain class is expressed by a hash table and the remaining attributes of the class and the hash table are allowed to correspond to the attributes of a table in a relational database, or the attributes of a certain class are expressed by a hash table and the attributes of a master class for the class concerned and the hash table are allowed to correspond to the attributes of the table in the relational database.
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