Comment 15 for bug 303273

Tim, for what do you need to read out a full PPD and write it back? For changing the defaults one only needs to send them to CUPS as key=value pairs, the IPP equivalent of "lpadmin -p <queue> -o <option1>=<value1> -o <option2>=<value2> ...". If you need to download the PPD, modify it and upload it, take care that the full PPD gets downloaded and not only a part of it.

For globalized PPDs keep in mind that they should permanently carry all the languages in the /etc/cups/ppd/<queue>.ppd file so that if there are different users with different UI languages that everyone gets the options and choices in his UI language.