The 0.85 luatex manual lists several \edef that can be used to emulate pdftex primitives in terms of the new \pdfvariable and friends.
Included in the list are \pdfimageaddfilename \pdfreplacefont \pdfxformattr \pdfxformresources which don't appear to be defined in pdftex. The first one is documented as being new > An extra \pdfimageaddfilename option has been added that can be used to block writing the filename to the pdf file. But the other three, that is \pdfvariable [replacefont|xformattr|xformresources] don't appear to be documented at all? Could you confirm if this is new functionality (and if so what? I could guess some from the name, but...:-) or is it existing pdftex functionality but there is a name change from the old pdftex versions (if so I missed this scanning the two manuals) thanks, David
