[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Web service and Semantic Web
> Because this Semantic Web rests on a > fundamental premise of building new assertions upon reference to > previous ones, > it relies not only upon the fixity of those assertions but also upon a > mechanism > which can be counted on to constrain any new expression to the scope, or > more precisely the intersecting scope, of the underlying referenced > assertions on > which it is predicated. Autonomous nodes, implementing idiosyncratic > methods, cannot be counted on to respect that limitation. Hmm. I hardly account myself a "semantic Web advocate" (at least not yet), but I do think the above somewhat misstates the position. As I see it, the SW is all about *not* requiring fixity. I tend to see it somewhat like the IP network: it can route around damage and adjust to change. As assumptions change, assertions can be added to the graph to reflect this change. Inferencing tools can help automate navigating these changes. Constraints are always presented in context, which can itself be changed. etc. I'm not saying I know how to make this all happen. As Dan says, "don't hold your breath". But this seems more in line with the goal I understand than globally-fixed constraints. -- Uche Ogbuji Principal Consultant uche.ogbuji@f... +1 303 583 9900 x 101 Fourthought, Inc. http://Fourthought.com 4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA Software-engineering, knowledge-management, XML, CORBA, Linux, Python
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