Re: Any conceptual equivalent?
This bounced back so I'm re-sending. Pardon me if it shows up twice. > Is there any conceputal equivalent in the world of XML > to the layered view of protocols that the ISO promulgated > so long ago? The ISO communication protocols are layered so that higher-level protocols build on, and use, lower-level protocols. Conceptually they are like a series of envelopes, with the actual information content contained inside frames having address information. There is overhead involved in messages -- you wrap the content with message headers, CRCs, and so on. To get to the core content, you must extract it from the envelope (the framing data used to ensure delivery). XML documents are self-describing. so they contain additional information besides the core content. You use tags to wrap the core content, so like message processing, there is a process of extracting the content from its framing information. Of course, XML can be also sent across the wire -- in which case it fits in the envelope analogy where you have to strip off CRCs, etc. before dealing with the XML document. xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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