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<dataConfig>
<dataSource driver="org.hsqldb.jdbcDriver" url="jdbc:hsqldb:/temp/example/ex" user="sa" />
<document>
<entity name="item" query="select * from item">
<entity name="feature" query="select description as features from feature where item_id='${item.ID}'"/>
<entity name="item_category" query="select CATEGORY_ID from item_category where item_id='${item.ID}'">
<entity name="category" query="select description as cat from category where id = '${item_category.CATEGORY_ID}'"/>
</entity>
</entity>
</document>
</dataConfig>