"This document is an OPTIONAL extension to the Internet Printing Protocol (IPP/1.0 and IPP/1.1). This document specifies 3 additional OPTIONAL operations for use with the Internet Printing Protocol/1.0 (IPP) and IPP/1.1. The end user@ operator@ and administrator Set- Job-Attributes and Set-Printer-Attributes operations are used to modify IPP Job objects and Printer objects@ respectively. The Get- Printer-Supported-Values administrative operation returns values that the IPP Printer will accept for setting its ""xxx-supported"" attributes."
RFC 3380-2002 history
2002RFC 3380-2002 Internet Printing Protocol (IPP): Job and Printer Set Operations