Is it really true that newline characters are not allowed in a marc value?
>  I thought they were, not with any special meaning, just as ordinary data.
>  If they're not, that's useful to know, so I don't put any there!
>

This is also my understanding.

However, what would be the use case for including them as you don't know how
they'll be interpreted by the app that you hand the data to? I've seen
people put HTML in certain fields to achieve a certain effect in catalogs,
but this is a dodgy practice since it relies on the questionable assumption
that the end application will just pass through whatever is sent.

kyle