additional conformance requirements beyond IPP 1.1. A subsequent Candidate Standard replaced it in 2011 defining an additional 2.2 version for production printers (PWG 5100.12-2011,). This specification was updated and approved as a full PWG Standard (PWG 5100.12-2015,) in 2015.

was published in 2013 and provides a common baseline for printers to support so-called "driverless" printing from client devices. It builds on IPP and specifies additional rules for interoperability, such as a list of document formats printers need to support.