<gsf:switch>
<gsf:metadata name="dc.Format"/>
<gsf:when test='equals' test-value='Audio'>
<gsf:link type="source"><gsf:metadata name="srcicon"/></gsf:link>
</gsf:when>
<gsf:when test='equals' test-value='Images'>
<gsf:link type="source"><gsf:metadata name="thumbicon"/></gsf:link>
</gsf:when>
<gsf:when test='equals' test-value='Supplementary'>
<gsf:link type="source"><gsf:metadata name="srcicon"/></gsf:link> <gsf:link type="document"><gsf:icon type="document"/></gsf:link>
</gsf:when>
<gsf:otherwise>
<gsf:link type="document"><gsf:icon type="document"/></gsf:link>
</gsf:otherwise>
</gsf:switch>