How is JDO(Java Data Object) different from VO(Value Object) ?

JDO is
- a persistence technology
-allows you to create POJOs (plain old java objects) and persist them to the database
.
Value objects
-usually referred as data holders but the correct term is DTO:
-represent an abstract design pattern used in conjunction with entity beans, JDBC, and possibly even JDO to overcome commonly found isolation and transactional problems in enterprise apps.
- do not allow you to persist objects - they are simple data holders used to transfer data from the database to the client and back to the database.