Well I would view that as either a header issue, that is on the file level, or as a data record specification issue. I should say though that I tried to stay away from the data as a whole as I'm more concerned with the strucuture of the container and not so much what it contains.
In other words, in some situations support for change records is required, but how its implemented I would think would require a lot of contextual analysis that can't be broadly generalized. Although please feel free to outline your thoughts on the subject, its not really something thats come up for me regularly, in fact only once really.
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