impedance mismatch

== English == === Etymology === Derived from the concept of impedance matching in electrical engineering. === Noun === impedance mismatch (plural impedance mismatches) (object-oriented programming) A set of conceptual and technical difficulties that are often encountered when a relational database is being served by an object-oriented application program, particularly because objects or class definitions must be mapped to database tables defined by a relational schema. ==== Translations ====