External IPP Extension attributes as defined in implementation specific
configuration files. To distinguish them from IANA registrations, their names have a
org.savapage.ext- prefix.
External IPP attributes can be used as IPP Job Ticketing Extension only.
The syntax is as follows:
External value extensions with
“type2 keyword” syntax must be ext.
prefixed.
Value none is a reserved internal value, indicating
that the attribute option is not selected.
External attribute values can be added to an Internal IPP Job Ticket Extension.
For example: to charge cost for a finishing to wrap a
printed copy into a folder, a ext.folder
value could be added to org.savapage-finishings-ext.
External IPP Extensions open the way to full customization of Job
Ticketing options. Any option with any number of choices can be configured in a PPDE
file as *SPJobTicket/Copy finishing, and thereupon be used in any
cost rule. See Section K.5.3.1, “Using External IPP Extensions” and Section L.3, “IPP Localization”.