W3C home > Mailing lists > Public > www-ws-arch@w3.org > September 2002

Humans and machines

From: Mark Baker <distobj@acm.org>
Date: Tue, 24 Sep 2002 01:41:55 -0400
To: www-ws-arch@w3.org
Message-ID: <20020924014155.G12078@www.markbaker.ca>

Sorry, I figured we didn't want to talk about this ...

> We will when someone responds effectively to the rest of Anne's point that
> you didn't quote: "An SOA requires that a service be defined by a contract.
> The Web has no such constraint. (HTTP GET tells an application how to get a
> resource, but not how to use it once it has it.)" 

The Web is an SOA, it's just that all the services expose the same
contract (I detect that this point isn't sinking in with people?).

As I asked in my presentation, what is it about a generic interface that
makes the service only fit for human consumption?  Nothing, in fact.
Tuples spaces have been used for app-to-app comms without anybody
claiming that a human was required there.  The point is that human or
machine processability is a property of the contract *and* the
information retrieved through it, not just the contract.  So, on the
Web, if you want a machine to be able to interact with a service, you
just need to make sure your data is machine-processable.

Or in other words, what's human-centric about the Web is HTML, not HTTP.

Mark Baker, CTO, Idokorro Mobile (formerly Planetfred)
Ottawa, Ontario, CANADA.               distobj@acm.org
http://www.markbaker.ca        http://www.idokorro.com
Received on Tuesday, 24 September 2002 01:41:38 UTC

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