util-namespace

using util-namespace you can specify you separate references for list and set and can use those
reference where you need reference injection for the list or set
<util-list id="tracks">
<value>Track1</value>
<value>Track2</value>
<value>Track3</value>
</util-list>

you can use this "songs" reference in the disc bean
<bean id="disc" class="com.data.Disc" 
p:title="MyDisc"
p:movie="Titanic"
p:songs-ref="tracks">
</bean>