Ira has pointed out that Mike's message did not make it to the list, so I
forward it below.
Bill Wagner
From: Michael Sweet [mailto:msweet at apple.com]
Sent: Thursday, February 11, 2010 5:42 PM
To: wamwagner at comcast.net
Cc: PWG, WIMS
Subject: Re: [Pwg-Announce] Registration of additional PDLs in IANA
PrtInterpreterLangFamilyTC
On Feb 10, 2010, at 5:31 PM, wamwagner at comcast.net wrote:
Greetings:
At the February WIMS Face-to-face meeting, it was agreed that, in line with
the standization of the IEEE 1284 Device ID COMMAND SET entry, it would be
desirable to have standard terms to identify more of the prevalent PDL
types and versions. The most reasonable way to do this is to add them to the
PrtInterpreterLangFamilyTC in the IANA Printer MIB
(http://www.iana.org/assignments/ianaprinter-mib)
It was suggested that JDF, JMF and PPML be added.
It was also suggested that new entrys be added to be able to distinguish
between significantly different versions of common PDLs. Suggestions were:
PS2, PS3, PCL3, PCL5e, PCL6 and various versions of PDF ( ISO 19005 [PDF/a],
ISO32000 [PDF1.7], PDF1.3, PDF1.5 and PDF/is were mentioned).
I am ambivalent about adding a whole list of variants - for example, "PCL3"
isn't enough since (for example) HP's current products use something called
"PCL3GUI" to support RGB bitmap printing - a significant difference.
Similarly, PDF 1.4 and 1.6 are much more prevalent than PDF 1.7, and in fact
ISO 32000 and PDF 1.7 are not quite the same thing. Adobe has also added
extensions to ISO 32000 since its publication, yet it is all just "PDF
1.7"...
For PostScript, I'm not sure that there are any new products (or old
products that would be updated) that support anything other than PS3, so I'm
not sure it is necessary to register PS2. Even if we did register PS2
support, there are a number of optional PS2 features that would also need to
be advertised (TrueType and CID font support, in particular) to make the
information useful.
An alternate approach would be to *not* include this information in the
command set but instead have separate keys for the major PDLs (PCL, PDF, and
PS), or make them first-class attributes for IPP (and the corresponding
semantic model - "pdf-versions-supported", "pcl-versions-supported", etc...)
so that we can track major versions and extensions needed for a client to
know what kind of data the printer can accept.
___________________________________________________
Michael Sweet, Senior Printing System Engineer
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