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EclipseLink/FAQ/WhatIsXR
What is XRM (XML-to-Relational)
A flexible component that maps between a database's relational structure(s) and XML's hierarchical structure{excerpt}. The use of EclipseLink's ORM and OXM features provides the basis for a powerful bridge between the two. To date, the only concrete realization of an XRM bridge is EclipseLink DBWS.
