xml-dev - Namespace Question

["Ed Hilburn" <lan3bra7@hotmail.com>]

As your average, usually competent internet developer I
have come to associate the "scheme:" prefix to a URI as
describing a protocol used to address, fetch, or otherwise
use a resource identified.  Examples:

      "ftp:"     This tells me to use File Transfer Protocol
      "mailto:"  This tells me to use Simple Mail Transfer Protocol
      "telnet:"  This tells me to use TELNET protocol
      "http:"    This tells me to use HyperText Transfer Protocol
      "shttp:"   This tells me to use Secure HTTP
      "file:"    This tells me to use the local file system's protcol

   For all of the above, I (perhaps naively) see the resource
   identified as the producer (ftp server,telnet deamon,
   http/shttp web server) or the consumer ( sendmail deamon,
   web server accepting a POST) of a particular stream of data.

I have a few questions.  If I use the "http:" scheme for
a namespace name URI, does it not imply that I should be
using the HyperText Transfer Protocol?  Yes?    Why or why not?

If so, what would I be fetching or posting?  And how
does this at all help the notion of a namespace?  I've
noticed that some of the namespaces give back a 401
page not found error.  Does this mean that the namespace
is no longer valid?

Please assist,

Ed
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