Am I correct in thinking there should really be something in that table anyway?
Yes and no, there are currently no explicitly 1-dimensional adapted features. There are (adaptors for Boost.Ranges) but they are for both polygon (2-dim) and linestring (1-rim) and their documentation is still lacking.
So I removed the simplelist in the Boost Book XML (which is used for the quick-reference). I merged this (this file only) to the release branch, so hope you can try it again with this update.
That gets it - works now, zip file updated to include geometry.pdf.
I checked but this was the only empty simplelist (sub-table) in this file.
The strange thing is that this (the empty table) was also the case for 1.47 (where the PDF was generated successfully). Anyway, hope that this will solve it.
Ah, I did upgrade XEP at one point, so maybe it's got stricter :-( Cheers, John.