.S.</code> 
<p class="justify">At line 17, prefix query to users is carried out for 
&ldquo;&lt;http://somewhere/somedirectory/subdir/&gt;&rdquo;, and &ldquo;swsd&rdquo; is replied by a user. At 
line 18 for &ldquo;&lt;http://somewhere/&gt;&rdquo;, &ldquo;sw&rdquo; is replied. At line 19, the local name is 
required at first, then &ldquo;J.S.&rdquo; is supplied, then, &ldquo;no&rdquo;" is replied for the prefix 
query. </p>
<h3>3.3 &nbsp;URI Named Space</h3>
<p class="justify">A URI reference is unique in W