Mixing structured/unstructured files in a book

Hi,

I have books with structured files (FM 7.1). All run well ...

Now, I have to include unstructured files into these books just to
produce PDF's files (one PDF per book) mixing the two kinds of file.
That seems to run weel too.

My problem is to make crossreferences (or just hyperlinks) from my
structured files to my unstructured file from my XML files.
I can do it directly with FrameMaker using crossreference markers but I
want to automate this operation because the XML of my structured files
is produced by a RDBMS.

Of course, I can change my DTD, "rules" and "EDD" files.

Thanks for yours ideas

Arfany