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Re: Announce: A brief history of SOAP

From: Larry Cable <larry.cable@sfbay.sun.com>
Date: Tue, 03 Apr 2001 15:58:47 -0700
Message-ID: <3ACA55A7.63E8CBFB@sfbay.sun.com>
To: Andrew Layman <andrewl@microsoft.com>
CC: xml-dist-app@w3.org
Andrew Layman wrote:

> If I send you a message such as
>
>         <Translate>
>                 <gamma>123.45</gamma>
>                 <epsilon>.67</epsilon>
>                 <pi>3.14159</pi>
>         </Translate>
>
> then you presumably either have somehow got some idea what this message
> means and what its structure is etc., or you don't and cannot process it
> (except as generic XML).  However you got the knowledge, that was the
> metadata.
>
> In the case of the messages sent to the "SOAP Validator" at UserLand's
> site, the documentation describing the messages is the metadata.
>
> I don't think you can do much without some metadata.  The only issue is
> the form that the metadata takes, largely whether it is in a standard
> form or not.

I concur, furthermore I would reinforce your assertion that a std mechanism
for describing such meta-data
is a "requirement" in order to enable both static and dynamic service
discovery and subsequent conversations.

Rgds

- Larry Cable.

>
>
> -----Original Message-----
> From: Dave Winer [mailto:dave@userland.com]
> Sent: Tuesday, April 03, 2001 3:31 PM
> To: xml-dist-app@w3.org
> Subject: Re: Announce: A brief history of SOAP
>
> Andrew I don't know enough about the kinds of environments you use, but
> I'm
> with Fredrik on this. We do just fine without any meta data. No
> "requires"
> here. Dave
>
> ----- Original Message -----
> From: "Andrew Layman" <andrewl@microsoft.com>
> To: <xml-dist-app@w3.org>
> Sent: Tuesday, April 03, 2001 12:07 PM
> Subject: RE: Announce: A brief history of SOAP
>
> > I think that the point is that any exchange of messages via SOAP (or
> > otherwise) requires that the parties have mutual access to some sort
> of
> > metadata describing the types of the data being exchanged.  WSDL
> > provides such metadata in an implementation-neutral way that supports
> > and leverages the W3C specifications such as Schema.
> >
> > -----Original Message-----
> > From: Fredrik Lundh [mailto:fredrik@pythonware.com]
> > Sent: Saturday, March 31, 2001 2:35 AM
> > To: Box, Don
> > Cc: xml-dist-app@w3.org
> > Subject: Re: Announce: A brief history of SOAP
> >
> >
> > > You can read it at http://www.develop.com/dbox/postsoap.html
> >
> >     "Does SOAP/XML Messaging make sense without something like
> >     WSDL? No way"
> >
> > huh?  I've got lots of users for my python soap implementation,
> > and now you're saying that what they do doesn't make sense?
> >
> > what have we missed?
> >
> > Cheers /F
> >
Received on Tuesday, 3 April 2001 18:58:53 GMT

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