Schema Mapping

The process of establishing explicit correspondences between entities, relations, constraints, and roles in one conceptual or data structure and those in another, so that relational patterns can be translated, compared, or reused; characterized by identifying homomorphisms, partial correspondences, and permitted transformations rather than by mere analogy or metaphor.

The process of defining correspondences between elements (fields, classes, vocabularies, constraints) of different metadata or database schemas to enable translation, integration, or interoperability of data while recording transformation rules and provenance.