[IPP] [PWG5100.13] Issue #51: Undefined reference to "[IANAPRT]"

[smith.kennedy at hp.com]

[Issue Unconfirmed]

In the ABNF for "printer-input-tray", "printer-output-tray" and
"printer-supply", there are references to "[IANAPRT]". Unfortunately, the
References section (Section 15) lacks any definition of this reference.

Link: http://www.pwg.org/issues/51