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100152RE: [XP] [OT] Delegation and YAGNI! And XML xref

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  • Olson, Curtis B
    Dec 1, 2004
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      > From: Jeff Grigg [mailto:jeffgrigg@...]
      > Sent: Wednesday, December 01, 2004 4:13 PM

      > Consider:
      > Suppose the Customer class was stored in the CUSTOMER table, and the
      > Employee class in the EMPLOYEE table. Why is the source of this
      > cross-reference data an XML file, rather than a general rule?
      >
      > Same for columns: Suppose the 'firstName' attribute is stored in
      > the 'FIRST_NAME' column. If you had naming standards and rules,
      > you'd hardly need a cross-reference file.

      OK, but....

      Legacy databases are not always so clean. Sometimes the attributes of a
      single object may come from more than one source table (or even from
      non-DBMS sources).

      Cheers,
      Curtis
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