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Re: WSIO vs. Semantic Web

• To: xml-dev@l...
• Subject: Re: WSIO vs. Semantic Web
• From: Mike Champion <mc@x...>
• Date: Wed, 13 Feb 2002 15:53:10 -0500
• In-reply-to: <E16b61s-0002NX-00@s...>

2/13/2002 3:00:38 PM, Gavin Thomas Nicol <gtn@r...> wrote:

 
>>
>> c) Thus, the data is no longer portable, and the operations are no
>> longer generic, so the Services Web is disjoint from the Web that we
>> know today.
>
>I would argue that you cannoy avoid these things. Application 
>semantics/interaction styles exist, one way or another. The sequence 
>of interactions, and the data exchanged are necessarily 
>application-specific... you cannot deduce them from the permissible 
>operations without some form of definition.

I meant that the "representation transfer" operations are generic, not the 
operations that are specific to the semantics of the data.  So I always know how 
to GET and PUT and DELETE a representation of the XML "object" identified by a 
URI, I know how to parse and manipulate it at the syntax/InfoSet level, but of 
course I need to understand some definition of the data (which may or may not be 
the same as the producer's definition of the data) to perform "meaningful" 
operations.  That's still quite a bit more than I can do with an object in a SOAP-
enabled distributed object system without detailed knowledge of the RPC 
definition.  

Whether it is generally useful to get a chunk of arbitrary XML data is another 
matter ...but at least a developer doesn't have to re-invent GET/PUT/POST/DELETE 
(and LOCK, UNLOCK, MKCOL, TAKE for that matter) for every new application or class 
hierarchy.

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