Re: Object-relational impedence

Marshall wrote:

> On Mar 14, 5:59 pm, David BL <davi..._at_iinet.net.au> wrote:

>>The WWW is data-centric.  It is not at all surprising that Http on
>>port 80 is *much* more common than RPC, CORBA, DCOM, RMI and SOAP put
>>together. Http concerns messages used to access data instead of
>>messages used to elicit behaviour.

> Interesting point.
>
> My high-level viewpoint: two important success factors for
> distributed computing turn out to be<drumroll>: logical independence
> and physical independence, at the (network) protocol level!

The essence of distributed computing is to prevent a logical view of computation as occurring on *one* system, even though the physical resources supporting the computation elements may be physically disparate.

The ODP specifications are a good place IMHO for beginners to look in order to learn about the fundamentals.

> Surprise!

Hardly.
Abstraction of the physical enviroment has been a fundamental concept in CS for aeons.

Regards,
Steven Perryman Received on Sun Mar 16 2008 - 05:47:43 CDT