doctrine/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.Models.Generic.SerializationModel.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://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="\stdClass">
        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>

        <field name="array" column="array" type="array"/>
        
        <field name="object" column="object" type="object"/>
    </entity>

</doctrine-mapping>