content/resources/Sample_JPA_Model.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"  xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
  <persistence-unit name="sample" transaction-type="RESOURCE_LOCAL">
    <class>com.salesorderprocessing.model.SalesOrderHeader</class>
    <class>com.salesorderprocessing.model.SalesOrderItem</class>
    <class>com.salesorderprocessing.model.Note</class>
    <class>com.salesorderprocessing.model.Material</class>
    <class>com.salesorderprocessing.model.Store</class>
    <properties>
      <!-- Config for default DB - Derby - Start -->
      <!--
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby:memory:students;create=true"/>
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
      <property name="eclipselink.ddl-generation.output-mode" value="database"/>
      <property name="eclipselink.weaving" value="false" />
      <property name="eclipselink.logging.level" value="SEVERE" />
      -->
      <!-- Config for default DB - Derby - End -->

      <!-- Config for custom DB - HSQLDB - Start -->
      <!-- User name and pwd in Destination config -->
      <property name="eclipselink.jdbc.driver" value="org.hsqldb.jdbcDriver" />
      <property name="eclipselink.jdbc.url" value="jdbc:hsqldb:mem:com.sample" />
      <property name="eclipselink.target-database" value="org.eclipse.persistence.platform.database.HSQLPlatform" />
      <property name="eclipselink.logging.level" value="SEVERE" />
      <property name="eclipselink.orm.throw.exceptions" value="true" />
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
      <property name="eclipselink.ddl-generation.output-mode" value="database" />
      <!-- Config for custom DB - HSQLDB - End -->
    </properties>
  </persistence-unit>
</persistence>