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>Developers and/or tools need to understand how to navigate the sets (for
>example, whether the members are in ascending or descending order as you
>traverse a set).
That's true at the basic DML level. But a lot of developers used declarative
4GLs that abstracted away from such detail.
> (Aside: Software AG's Tamino might implement XML over a
> network model. Adabas
> was one of the most successful CODASYL DBMS products.)
Actually, I don't think ADABAS ever was a CODASYL DBMS... it's essentially a
hierarchic database rather than a network database.
And Tamino is not implemented over ADABAS, though it does reuse code from
some of the lower-level components such as locking, page caching, and