Why does Xprint not use PPDs for configuration ?
Xprint supports multiple “page description languages (PDL)” including PostScript, PDF, PCL, etc. Therefore Xprint uses a different configuration file format which works with all these PDLs and not only PostScript (PPD files are PostScript-specific and cannot be used for other PDLs). There is currently a converter in development to convert a Adobe PPD file into Xprint’s model-config format. See xprint.freedesktop.org bug 636 (“RFE: Add an Adobe PPD to model-config converter / xpppdtomodelconfig”) for further information.