Interfaces for user-defined custom types.
| CompositeUserType | A UserType that may be dereferenced in a query. |
| EnhancedUserType | A custom type that may function as an identifier or discriminator type, or may be marshalled to and from an XML document |
| LoggableUserType | Marker interface for user types which want to perform custom logging of their corresponding values |
| ParameterizedType | Support for parameterizable types. |
| UserCollectionType | A custom type for mapping user-written classes that implement PersistentCollection |
| UserType | This interface should be implemented by user-defined "types". |
| UserVersionType | A user type that may be used for a version property |