Comment 20 for bug 265033

I've sent an email to the support folks at Amgraf, the company responsible for the software that generates the IRS's PDFs. (I'd called on the phone and (poorly) attempted to describe the situation to a rep, who suggested that I email the support department.)

I've also found a couple of references on the short font names for use in 'DA' fields in forms. iText, for instance, includes the list.

http://itext.svn.sourceforge.net/viewvc/itext/trunk/src/core/com/lowagie/text/pdf/AcroFields.java?revision=3771&view=markup#l_2320

See the Scribus source, here, in PDFlib::PDF_Annotation().

http://scribus.info/svn/Scribus/branches/start/Scribus/scribus/libpdf/pdflib.cpp

Here's the original bug report for Scribus; it seems that it's just an extraordinarily common, though undocumented, extension; maybe seeing how another PDF-using system dealt with the problem will be helpful.

http://bugs.scribus.net/view.php?id=4620

The first table in this tutorial (p. 10) from 1999 has the list in it, so it goes back at least that far.

http://www.math.uakron.edu/~dpstory/tutorial/pdfmarks/forms.pdf