itself, such as xml:space 
 and xml:lang. It was defined by the W3C's XML Namespaces spec.</li>
 <li>S_XSLNAMESPACEURL (http://www.w3.org/1999/XSL/Transform) is the
 URI which indicates that a name may be an XSLT directive. In most
 XSLT stylesheets, this is bound to the "xsl:" prefix. It's defined
 by the W3C's XSLT Recommendation.</li>
 <li>S_OLDXSLNAMESPACEURL (http://www.w3.org/XSL/Transform/1.0) was
 used in early prototypes of XSLT processors for much the same purpose
 as S_XSLNAMESPACEURL. It is now 