[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: ID/IDREF is evil
Interesting thoughts Kurt, I seem to follow you and Dan McCreary around the countryside (http://semanticweb.com/native-xml-databases-and-rdf_b20575) "Have you seen them? Yes - they were here about two years ago". Halpin now certainly seems to be going in the hybrid database direction you are suggesting with a new database system called 'LogicBlox'. I am just starting to read his Information Modeling and Relational Databases. Second Edition (which does seem largely about ORM and it merits), but that is pre-LogicBlox. My key point is this: that from a cost-benefit perspective XML databases seem to have a lot of merit, if the data starts out in a hierarchical format and can be managed and used for its purposes (by creating information using XQuery) then there is little merit in normalising it. In fact, from a data user perspective, one who is not that familiar with the eventual relational model design, but who understands how the data was collected (essentially has a conceptual model), I think it adds significantly to the cost. It seems that since the relational approach and SQL were invented, Moores Law, and the web, have totally flipped the economic equation. We can now use computing power to make sense of messy denormalised data quite well. To me using conceptual models as the interface to such data now seems like a good thing. So maybe its not hybrid databases but smarter clients that are needed? I have liked the 'info-space' ideas that Hans-Juergen Rennau has put forward in this regard, a kind of navigational approach to data in my view. I hope some of this is of interest. Thanks Steve Cameron On Fri, Feb 21, 2014 at 3:22 AM, Kurt Cagle <kurt.cagle@gmail.com> wrote:
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