Select Code to Download

<dependency><use idref="vanilla"/>
  <use idref="nut"/><use type="optional" idref="mango"/>
</dependency>

<ingredients>
  <ingredient id="vanilla"><name>vanilla</name><description>...</descr
+iption></ingredient>
  <ingredient id="nut"><name>nuts</name><description>...</description>
+</ingredient>
  <ingredient id="mango"><name>mango</name><description>...</descripti
+on></ingredient>
</ingredients>