itests/jpa-container-testbundle/src/main/resources/META-INF/custom-mapping.xml

<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://xmlns.jcp.org/xml/ns/persistence/orm_2_0.xsd"
    version="2.0">

    <package>org.apache.aries.jpa.container.itest.entities.mapped</package>
    <entity class="org.apache.aries.jpa.container.itest.entities.mapped.Truck" name="Truck">
        <named-query name="GET_DEVELOPER">
            <query>SELECT DISTINCT record FROM Car record ORDER BY record.engineSize</query>
        </named-query>
        <attributes>
            <id name="numberPlate">
                <column name="PLATE" length="255" />
            </id>
            <basic name="colour">
                <column name="COLOUR" length="255" />
            </basic>
            <basic name="engineSize">
                <column name="ENGINE_SIZE" />
            </basic>
            <basic name="maxLoad">
                <column name="MAX_LOAD" length="255" />
            </basic>
        </attributes>
    </entity>
</entity-mappings>