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JPA Doc
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Persistence.PERSISTENCE_PROVIDER

Static Field javax.persistence.Persistence String PERSISTENCE_PROVIDER Deprecated. This final String is deprecated and should be removed and is only here for TCK backward compatibility Since: JPA 1.0
JPA Doc
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JPA Reference (JavaDoc)

This reference contains the API documentation (similar to JavaDoc) of the Java Persistence API (JPA) 2.0. The content is derived from the original JPA documentation (in the EclipseLink JPA 2 RI) with some additions and notes. The four most basic JPA types are: All the other JPA types are organized
FAQ
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Which API should I use - JPA or JDO?

You can use ObjectDB with either the Java Persistence API (JPA) or the Java Data Objects (JDO) API. Both share similar architecture, design and abilities. When to prefer JPA JPA is more commonly used. Therefore, it might be the first choice for most new applications. You can use JPA as the primary
Manual
11

DELETE Queries in JPA/JPQL

. For example, the EntityManager may not be aware that a cached entity object in its persistence context has been removed from the database by a DELETE query. Therefore, it is a good practice to use
Manual
11

UPDATE SET Queries in JPA/JPQL

its persistence context has been modified by an UPDATE query. Therefore, it is a good practice to use
Manual
11

Chapter 2 - JPA Entity Classes

Explains how to define and use JPA entity classes and other JPA persistable types.
Manual
11

CRUD Operations with JPA

Explains how to use JPA for CRUD database operations (persist, retrieve, update, remove).
FAQ
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Where can I learn how to use ObjectDB?

All about Where can I learn how to use ObjectDB? in Java/JPA database - explanations, examples, references, links and related information.
JPA Doc
11

javax.persistence.spi.PersistenceUnitInfo

javax.persistence.spi Interface PersistenceUnitInfo Interface implemented by the container and used by the persistence provider when creating an javax.persistence.EntityManagerFactory. Since: JPA 1.0 ... are only transformed once within the same classloading scope, regardless of how many persistence units
JDO Doc
10

javax.jdo.PersistenceManager

is specified as null, events for all persistent classes and interfaces will be sent to listenerInstance ... 1.0 void deletePersistent(Object pc) Delete the persistent instance from the data store. Delete the persistent instance from the data store. This method must be called in an active transaction