One more question about sharing FM files

[Shmuel Wolfson]

In the footer, is it better to use a variable for the book name or 
hidden conditional text.
Conditional text seems better in the sense that there probably are other 
things in the chapter that are conditional, but I've heard there is a 
limitation on the amount of conditional text types you can have.

What do most people do for this?

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Regards,
Shmuel Wolfson