154 Persistence descriptor 10.3.4 jdo.dtd (extract) This element identifies a single persistence-capable class. It has four attributes: . The name attribute identifies the name of the class. The name is relative to the enclosing
element. . The identity-type attribute specifies the required JDO identity, and must be one of application, datastore, and nondurable. The default identity is datastore. . An objectid-class attribute must be specified only for classes with application identity. The identified Object ID class is relative to the enclosing package element. Inner classes are identified using the $ symbol following the standard set by the Java compiler. If the class is part of an inheritance hierarchy of persistence-capable classes, the Object ID class must be part of a corresponding inheritance hierarchy of Object ID classes. . The requires-extent attribute specifies whether the extent of this class must be managed by JDO. The default is true. Persistence managers will only return the Extent of classes for which requires-extent is true. The element may contain zero or more and elements. 10.3.5 jdo.dtd (extract) This element identifies the persistence characteristics of individual fields in a class. JDO assigns default persistence modifiers to each field defined in a persistence
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