The Next Stage in Composition -- McIlroy

Nearly all of the XSL-FO renders offer print output via PDF. It seems odd at first—why PDF? But what alternative? QuarkXPress native format? OEB (Open e-Book)? PostScript? No, PDF is the logical format. It's well-structured (much more so than PostScript), and well-documented (the 1,172 page PDF Reference for PDF 1.5 can be downloaded without charge from Adobe's Website).