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'''Object–relational impedance mismatch''' is a set of difficulties going between data in relational data stores and data in ___domain-driven object models. [[relational database management system | Relational Database Management Systems]] (RDBMS) is the standard method for storing data in a dedicated database, while [[Object-oriented programming|object-oriented]] (OO) programming is the default method for business-centric design in programming languages. The problem lies in neither relational databases nor OO programming, but in the conceptual difficulty mapping between the two logic models. Both logical models are differently implementable using database servers, programming languages, design patterns, or other technologies. Issues range from application to enterprise scale, whenever stored relational data is used in ___domain-driven object models, and vice versa. Object-oriented data stores can trade this problem for other implementation difficulties.
The term ''impedance mismatch'' comes from [[impedance matching]] in [[electrical engineering]]
== Mismatches ==
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