muzich/vendor/doctrine/tools/sandbox/xml/Entities.User.dcm.xml

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                    http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="Entities\User" table="users">
        <id name="id" type="integer">
            <generator strategy="AUTO"/>
        </id>
        <field name="name" type="string" length="50"/>
        <one-to-one field="address" target-entity="Address">
            <join-column name="address_id" referenced-column-name="id"/>
        </one-to-one>
    </entity>

</doctrine-mapping>