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Hi y'all I can see that my comments on ligical design before physical design started a small flamestorm here. I am sorry this happened. But I can see that many lost the central issue of my email (and some caught it, thanks): ------ We need a modelling theory, that allows us to focus on the logical modelling first. Then we need methods to map this logical model to some kind of physical storage. Be it a rdbms, xml-enabled rdbms, hierachical db, oodb or a 'native xml store'. Without the logical modelling theory in place, we will never know whether the schema was sound and safe before we mapped it to physical storage. Design first, then implement. ------ It should not be a flamewar between "Native vs everybody else". What I am trying to say, is that as long as we don't have a proper XML data/document modelling theory, it will just be some exotic features (maybe sunken cost into existing e.g. Oracle installation?) that will determine which physical storage that will be used. I've been around the SGML modelling theories, and most of these are document oriented DTD theories. I am still looking for the "XML Data/Doucment Modelling theory" (Hey, maybe I write the book myself ?) Best regards Jens Jakob
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