update/org.eclipse.update.tests.core/data/mirrors/update-site4/site.xml

<?xml version="1.0" encoding="UTF-8"?>
<site>
   <feature url="features/update.feature1c_3.0.0.jar" id="update.feature1c" version="3.0.0">
      <category name="Site4-Category1"/>
   </feature>
   <category-def name="Site4-Category1" label="Site4-Category1-Label">
      <description>
         ecetera.
      </description>
   </category-def>
</site>