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Barbara,Like any other control mechanism, it takes discipline and organization. Our LDA has pre-defined slots for permanent or widely used attributes, such as company number. These are part of the system documentation. Such elements are defined in the lower portion (1-256) of the LDA. Reusable elements, such as used by a batch report job, would use the upper portion (257+) for its own "stuff," if needed.
Jim Sloan cringes, too, at using the LDA. But since I started using it on the /34, I've never stepped on an area that I shouldn't have. It's no different from "flat" files we had to use on the /34 and /36; you can step all over those (and sometimes you wanted to), but we "solved" the problem with copybooks.
For simple control mechanisms, like the aforementioned company number, it's a good way for program-to-program communication. But "good" is a subjective word and, thus, merely an opinion.
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Barbara Morris wrote:
Evan Harris wrote:I'll be interested to see if there are [m]any comments about why the LDA is not a good idea :)Something I've always wondered: How do you know what section of the LDA you are free to use? How can you be sure that no other program in your job is already using that section? Me, I'd be terrified to start using the LDA, especially on a system where the use of the LDA was common in applications. I wouldn't know when to stop testing whether I had messed anything else up.
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