tests/org.eclipse.core.tests.runtime/Plugin_Testing/regression.resolve.11/tests.a/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<plugin
  name="pluginA"
  id="tests.a"
  version="1.0.0">
  <requires>
     <import plugin="tests.b" optional="true" version="2.0.0" match="perfect"/>
     <import plugin="tests.c"/>     
  </requires>

</plugin>