 the same @Target of <a href="../WebServiceRef.html" title="annotation in javax.xml.ws"><code>WebServiceRef</code></a> annotation, so that the resulting
 feature annotation can be used in conjunction with the <a href="../WebServiceRef.html" title="annotation in javax.xml.ws"><code>WebServiceRef</code></a>
 annotation if necessary.
 <p>
 If a JAX-WS implementation encounters an annotation annotated
 with the <code>WebServiceFeatureAnnotation</code> that it does not
 recognize/support an error MUST be given.<