URN Sub-Namespace Registration for
     'urn:ietf:params:xml:ns:pidf:rpid'

   URI: urn:ietf:params:xml:ns:pidf:rpid
   Description: This is the XML namespace for XML elements defined by
      RFC4480 to describe rich presence information extensions for the 
      status element in the PIDF presence document format in the 
      application/pidf+xml content type.

   Registrant Contact: IETF, SIMPLE working group, simple&ietf.org,
      Henning Schulzrinne, hgs&cs.columbia.edu

   XML:

    BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
      "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml
      <head>
           <meta http-equiv="content-type"
           content="text/html;charset=iso-8859-1"/>
           <title>RPID: Rich Presence: Extensions to the Presence
             Information Data Format (PIDF)</title>
      </head>
      <body>
          <h1>Namespace for rich presence extension</h1>
          <h2>urn:ietf:params:xml:ns:pidf:rpid</h2>
          <p>See <a href="http://www.ietf.org/rfc/rfc4480.txt">RFC4480</a>.</p>
       </body>
       </html>
      END
