I did a search for "PDF" on CPAN before I posted my question and came up with 99 matches. (Yikes!) I browsed the docs for the ones that looked most likely, but for the most part they seem to be oriented towards delving very deeply into the structure of PDF files -- and apparently don't mention FDF files at all. :-(

In contrast, Adobe's FDF Toolkit talks a lot about the FDF files -- but not about the PDF files. (Doh!)

Wally Hartshorn