Discussion
Which of the following products implemented the CODASYL DBTG model?
Answer: A
Correct answer: IDMS
IDMS implemented the CODASYL DBTG network model, the dominant pre-relational approach, in which records are linked by explicit sets and navigated pointer by pointer. It is still in use on mainframes. DB2 is relational; dBase-II and R:base were PC products.
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