Fop documentation (xml version) The files in these directory contain the Fop documentation as xml files. The directory xml-docs/fop is a mirror of the files in the cvs repository modul 'xml-site' /sources/fop. These files are used to create the html documentation on xml.apache.org. Use the html target in the main build script in the xml-fop root directory. You can create a pdf file containing the complete Fop documentation.