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> Tim Berners-Lee wrote: > > > In a distributed system, the semantics must be carried by the message. > > W. E. Perry wrote: > > No. Content is carried by the message, expressed in the agreed > syntax. The only case in which a message may be said to carry semantics is where there is > agreement (if only implicitly) beforehand that particular > syntactic constructs shall be treated as conveying particular (agreed and fixed) > semantics. Historically, EDI trading partners have had to sit down and agree message implementations before they can exchange messages and extract meaning, even when there is an agreed standard to map to in the middle. On the Internet ad hoc relationships will be set up to exchange messages, sitting down beforehand is not an option. It is this that requires that the semantics be carried by the message. This doesn't mean that it is easy, however. Either everyone has to speak the same language or an interpreter in the middle has to speak all languages. DG . . . . . . . . . . . . . . . . . David Galbraith - Chief Architect Moreover.com - the webfeed company david@m... 415-577-8828 (US) 0777-565-8880 (UK) favorite webfeed: http://www.moreover.com/xml *************************************************************************** This is xml-dev, the mailing list for XML developers. To unsubscribe, mailto:majordomo@x...&BODY=unsubscribe%20xml-dev List archives are available at http://xml.org/archives/xml-dev/ ***************************************************************************
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