Re: XML Database Decision Tree?
Date: Mon, 29 Oct 2001 22:13:18 -0500 From: "Champion, Mike" <Mike.Champion@S...> My point isn't that data modelling is pointless in an XML DBMS, just that it's not absolutely necessary to do a serious data modelling effort in order to do get a minimal DBMS application running. Likewise, the default indexing scheme may do a pretty good job without any performance tuning, although an informed analysis of the data model and the indexing strategy can generally improve performance. All this can be VERY useful if you have more types of data than you can model, but need to store, retrieve, and query instances of them reasonably efficiently. I'd put it a little bit differently. I think the question of whether you model with relations versus XML is really distinct from the question of when it's important to do Heavy Duty Design-Analysis-Modelling and Serious Performance Tuning versus when those things aren't really needed. The two things are basically orthogonal. However, in practice, they end up being linked, because the "traditional corporate data center" these days almost always uses RDBMS and almost always does all the heavyweight stuff. You're right about not needing to do those things to get a minimal DBMS application going, but that applies even if the minimal DBMS application is using a relational database system.
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