THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The SDO Specification 2.1 for Java describes the data programming interface for Java language.
This SDO White Paper A white paper that explains the SDO programming model Gives some good insights into the motivations for SDO in its early conception.
Part one of a recent (November 2006) paper entitled "What is SDO?" can be found in this article. Part 2 should be available some time in March 2007.