NHibernate is a port of the Hibernate Core for Java to the .NET Framework. It handles persistent POCOs (Plain Old CLR Objects) to and from an underlying relational database.
PowerDesigner supports NHibernate through an extension file that provides enhancements to support all the common .NET idioms, including association, inheritance, polymorphism, composition, and the collections framework are supported. NHibernate allows you to express queries in its own portable SQL extension (HQL), as well as in native SQL, or with Criteria and Example objects.
To enable the NHibernate extensions in your model, select Attach an Extension tool, select the NHibernate file (on the O/R Mapping tab), and click OK to attach it.
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