The <attribute-list> tag lists a resource and its attributes.
.-------------------. V | >>-<attribute-list>--| Resource |----+---------------+-+--------> '-| Attribute |-' >--+-------------+--</attribute-list>-------------------------->< '-| Message |-'
<attribute-list>
<resource>
…
</resource>
<attribute id="37">
…
</attribute>
…
<attribute id="78">
…
</attribute>
</attribute-list>