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" Not quite. Exit programs, triggers, and callbacks are all variations on the same basic concept of shared, standardized code calling installation-specific code, but different from each other. An exit program is, first and foremost, a *program* that is tied to an exit hook, either via some registry mechanism, or simply by having the right name. It is called whenever the hook is encountered, without regard for what file(s) might be involved. A trigger program is like an exit program, except that the hook is b..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://archive.midrange.com/midrange-l/201210/msg00676.html>