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So many layers - so little time in life.
For more on layers see:
http://www.uwsg.iu.edu/usail/network/nfs/network_layers.html
also Google on 'OSI layers' for more links (if this interests you!)
Just depends on which lines you want to draw in the sand and how
many...
DW
==============================================================
Quoting Michael Kay <michael.h.kay@ntlworld.com>:
> >
> > I remember reading a long time ago a posting by David
> > Megginson. Paraphrasing, David said, "when dealing with XML
> > you are working down at the bare metal".
> >
> > Other technologies work down at the bare metal, such as
> > TCP/IP. Perhaps there are lessons to be learned there?
> > Certain TCP/IP packets are rejected as bad and the other
> > packets are accepted and passed up to other layers, where
> > those layers perform additional constraint checking.
> >
>
> TCP is 4 layers above the bare metal, IP is 5 layers above, XML is 6 layers
> above, and a specific XML vocabulary (as described by a schema) is 7 layers
> above. Every layer in the protocol stack needs to check that its own rules
> are satisfied.
>
> Michael Kay
>
>
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