class="justify">When SWCLOS reads RDF/XML files, the namespace directions with 
<a 
href="http://www.w3.org/TR/REC-xml-names#NT-PrefixedAttName">PrefixedAttName</a> 
'xmlns:' and <a 
href="http://www.w3.org/TR/REC-xml-names#NT-DefaultAttName">DefaultAttName</a> 
'xmlns' make the mapping from a URI to the package name. On the other hand, from 
the standpoint of lisp expression, SWCLOS users can direct the mapping from a 
package to a uri in the package documentation as demonstrated above, in which a 
user pu