living fossil?

Hi,

I found this in a .NET public beta 2 CAB file that I just generated:

--
<?XML version="1.0" ENCODING='UTF-8'?>
<!DOCTYPE SOFTPKG SYSTEM "http://www.microsoft.com/standards/osd/osd.dtd">
<?XML::namespace href="http://www.microsoft.com/standards/osd/msicd.dtd" 
as="MSICD"?>
<SOFTPKG NAME="BufferMapperCab" VERSION="1,0,0,0">
         <TITLE> BufferMapperCab </TITLE>
             <MSICD::NATIVECODE>
                 <CODE NAME="BufferMapper">
                     <IMPLEMENTATION>
                         <CODEBASE FILENAME="BufferMapper.exe">
                         </CODEBASE>
                     </IMPLEMENTATION>
                 </CODE>
             </MSICD::NATIVECODE>
</SOFTPKG>
--

Anyone recognise this PI-based usage - is it a pre-namespaces-rec 
syntax, or what?

Francis.