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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Streaming XML (WAS: More on taming SAX (was Re:
 On Mon, 27 Dec 2004 22:14:54 -0500, Liam Quin <liam@w...> wrote: > Don't forget that a projection of relational tables into the > XPath 2 Data Model is also possible, so that it becomes possible to > use XQuery over "normal" (non-XML) relational tables. There are > implementations (both open source and proprietary) doing that today. Don't forget the points that Dare Obasanjo http://lists.xml.org/archives/xml-dev/200412/msg00443.html and Soumitra Sengupta http://lists.xml.org/archives/xml-dev/200412/msg00445.html have made about the difficulties of making this work in practice. :-) The *story* about XQuery in middleware sounds great. The reality gets pretty ugly. All I'm really arguing is that people should have realistic expections about XQuery. It has a very useful role to play in the XML ecosystem, and we need to complete the Recommendation in a timely manner. IMHO it shouldn't get wrapped around everything that might be possible to do with it, because that will cause a lot of frustration and give the language as a whole a bad name. Maybe I'm just disillusioned because my last two employers invested very heavily in XQuery and have gotten mostly frustration so far in return, largely because of the delays caused by trying to do too much. I think the way forward is to focus on what it does that nothing else does well -- querying XML stores -- and not promoting it as an alternative to existing, more mature technologies. Arguably XQuery is good enough to be an XML query language, a SQL integration language, an XML transformation language, and a native XML development language. The problem is that the network effect from interoperability that made XML succeed isn't at work in the XQuery domain, so it will have to win mindshare battles separately against SQL for relational integration, XSLT for transformation, and all sorts of alternatives for building XML applications. I don't think it will decisively win any battles except the one for which there is no opponent, i,e, querying XML data sources. Of course, I'm partly throwing this out to see if anyone chews it to pieces :-) If there is a critical mass of people out there happily using XQuery to do all this other stuff, I want to hear about it! 
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