gistfile1.xml

<?xml version="1.0" encoding="UTF-8"?>
<container>
    <class name="user" class="User" />
    <class name="user.profile" class="Users_Model_Profile" />
    <class name="user.friend" class="\Users\Model\Friend" />
</container>

<container>
    <class id="user" class="User">
        <construct>
            <param required="true">array</param>
            <param>AgentInterface</param>
            <param>scalar</param>
        </construct>
    </class>
</container>

<container>
    <service-point id="CarBuilderService">
        <invoke-factory>
            <construct class="Car">
                <service>DefaultCarImpl</service>
                <service>DefaultEngineImpl</service>
            </construct>
        </invoke-factory>
    </service-point>
</container>

<container>
    <object id="user" class="\Users\Model\User" singleton="false" />
    <object id="user.profile" class="\Users\Model\Profile" singleton="false">
        <property required="true">\Users\Model\ProfileInterface</property>
    </object>
</container>

<container>
    <component id="user">
        <scope>application</scope>
        <class>\Users\Model\User</class>
        <interface>\Users\Model\UserInterface</interface>
    </component>
</container>