[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Composability: Do the Emperor's Clothes Fit? (RE: Costs, bene
I like the emphasis on composability in that overview. http://lists.xml.org/archives/xml-dev/200203/msg01005.html As Tim Bray noted, many started this odyssey as document geeks. Some do other forms of composition, but composability is a tenet that one should contrast to interoperability and ask if the common understanding of interoperability is correct. Composability assumes that portable data requires interoperability first because each part of the message assumes a reliable, working service which shares definitions if not sharing implementations. One can compose nonsense quite easily with portable data if one composes statements the system can't reliably process. But the web is NOT one system. It is lots of little systems all in different lifecycles and the chaotic behaviors arise because of that. Is the Emperor naked? No. Parts of the WS polyglot work reliably. Is he stylishly attired? Do we care? Probably not. Is he overdressed? Possibly. So I ask about the WS-I and the basic profile. One does expect the major companies to get beyond 'basics' ahead of the standards. The king and the peasant dress differently and the tailors charge accordingly and schedules a production run accordingly. The emperor was naked because the tailors were dishonest, the emperor was gullible, and his subjects were politically correct. That isn't a problem here. :-) In short, the basics work. WS are following the pattern of car manufacturing based on common parts. We may not get reliable power brakes as composable parts until one or two manufacturers assemble and sell them for awhile. So even if slow, the web services industry appears to be on track. Again, in this period, we should emphasize specification with an eye to standardization. A question of interest is when does composition create an insecure and unreliable service? Well, one should choose their tailors wisely and if they promise magic, be dubious. Once again, the web hypeMonster bites. len From: Dare Obasanjo [mailto:dareo@m...] http://msdn.microsoft.com/library/en-us/dnwebsrv/html/wsoverview.asp
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