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関係
Wikipedia definition
1. Object-relational mappingObject-relational mapping (ORM, O/RM, and O/R mapping) in computer software is a programming technique for converting data between incompatible type systems in object-oriented programming languages. This creates, in effect, a "virtual object database" that can be used from within the programming language. There are both free and commercial packages available that perform object-relational mapping, although some programmers opt to create their own ORM tools.
Read “Object-relational mapping” on English Wikipedia
Read “オブジェクト関係マッピング” on Japanese Wikipedia
Read “Object-relational mapping” on DBpedia

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