؟ JPA.
@Entity
.
ޟ @Inheritance , ן ן ( JSR 220):
@Inheritance
SINGLE_TABLE -- . ޟ ן.
TABLE_PER_CLASS -- .
JOINED -- . - ޣ ݟ ( ޟ ), ޣ ޣ ݟ . ޣ - ݟ ޣ ݟ .
orm.xml
ݟ ޟ ޟ ޟ. ޟ ޣ ޟ META-INF/orm.xml.
META-INF/orm.xml