Re: Serializations and data structures (was Re: Topic Maps onSQL)
>Well, you can't very well transmit the data model itself between computers >or down through time. In other words: you must have the serialization >syntax. The question is: is an explicit specification of the data model >of any use? Do you mean the definition of the data model or instances of data that conform to it? If you mean the former, then certainly it can be transmitted reliably because we have a number of standards for doing so, all based on a formal representation syntax, including the EXPRESS character syntax, property set definition documents, etc. (I note that UML currently has no defined character representation, but they are trying to fix that by defining an XML representation). If you mean the latter, again, we have defined serialization mechanisms that allow the data instances to be reliably transmitted: Part 21 of the STEP standard, the CGR document for groves, etc. One could even argue, I think, that persistent CORBA objects that reflect the data model are reliable transmission vehicles (what is a persistent object but a syntactic representation of the abstraction the object represents--it might be opaque if it's binary, but it still has a syntax). Cheers, E. -- <Address HyTime=bibloc> W. Eliot Kimber, Senior Consulting SGML Engineer ISOGEN International Corp. 2200 N. Lamar St., Suite 230, Dallas, TX 75202. 214.953.0004 www.isogen.com </Address> 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/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe 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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