Storing RDF in a relational database

Brief summary: Hibernate mapping to store RDF feeds
Schema: 
<!-- Hibernate XML format -->
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping.dtd">
<hibernate-mapping>
  <class name="nz.corp.orchidtech.GMailRSS.Article" table="Messages">
    <property name="author" column="From" type="string" />
    <property name="title" column="Subject" type="string" />
    <property name="date" column="Date" type="date" />
    <property name="description" column="Excerpt" type="string" />
    <property name="link" column="Link" type="string" />
  </class>
</hibernate-mapping>
-- 
Cheers,
Hasan Diwan <hasan.diwan@gmail.com>