NPersistence Reference Guide
The PersistenceUnit type exposes the following fields.
XNA Framework Only
.NET Compact Framework Only
(Optional) The name by which the entity manager factory is to be accessed in the environment referencing context; not needed when dependency injection is used.
(Optional) The name of the persistence unit as defined in the persistence.xml file. If specified, the persistence unit for the entity manager factory that is accessible in JNDI must have the same name.