[printing-jobticket] RE: SM> Job "Actual" attributes

[printing-jobticket] RE: SM> Job "Actual" attributes

Harry Lewis harryl at us.ibm.com
Fri Oct 11 13:05:00 EDT 2002

Very good comments, Shawn. The ISTO Printer Working Group shares your 
desire to eliminate redundancy in the industry by harmonizing standards 
efforts, where appropriate. This is the main reason we are now formalizing 
a "Common Semantic Model". This effort spawned from the recognition that 
the Java Print API, UPnP Printing and Bluetooth Printing all leveraged 
concepts from IPP but each with somewhat different interpretations. This 
gave us a signal that the MODEL represented by IPP is applicable to a wide 
variety of print environments. The first true instance of a print solution 
based on the PWG Semantic Model will be the Print Services Interface, also 
coming from the PWG. We hope that OpenPrinting will leverage the Semantic 
Model and feel there is quite good harmony between the two... largely 
because of the FSG choice of IPP using CUPS and PAPI.

Initially, the Common Semantic Model is largely derived from IPP. In our 
efforts to document a working version of the SM we have not taken the time 
to properly address either Job Ticket or Capabilities Object. So far, we 
have consciously postponed these topics while we lay in other parts of the 
framework. We have NOT excluded these concepts and fully expect to address 
them in the future. One of the items the PWG has also been working on is 
the Universal Printer Description Format (UPDF) which may make an 
excellent capabilities object describing not only device capabilities but 
constraints among features as well (can't duplex transparency, for 

I don't think the FSG has made a bad choice with IPP. To the contrary, 
there has been enough investment in IPP over the past couple years that 
you should get a lot of leverage in terms of shortened development cycles 
and wide product support. I think the PWG Semantic Model can probably 
benefit more than we realize from experience in the OpenPrinting group 
with some of our outstanding issues (JT and Capabilities)... albeit 
perhaps not until v2. PSI is also a good candidate for FSG to leverage if 
you want to address the web services environment. Your initial focus on 
IPP (and it's high correlation with the Semantic Model) should give you a 
head start in this direction. 

As for Scan and Fax, the PWG, like any organization, has had to work 
within our limitations. Our scope is probably in need of expansion in 
these areas. As you have observed, we do have an IPP-FAX group who are 
closing in on a universal image format that will allow fax-like operations 
over IPP. This image format can easily be leveraged by other solutions 
such as PSI. 
Harry Lewis 
IBM Printing Systems 

"PRATT,SHAWN (HP-Boise,ex1)" <shawn_pratt at hp.com>
10/11/2002 09:27 AM
        To:     "TAYLOR,BOB (HP-Vancouver,ex1)" <robert_b_taylor at hp.com>, 
"'Hastings, Tom N'" <hastings at cp10.es.xerox.com>, Harry 
Lewis/Boulder/IBM at IBMUS
        cc:     "McDonald, Ira" <imcdonald at sharplabs.com>, "Zehler, Peter" 
<PZehler at crt.xerox.com>, sm at pwg.org, printing-jobticket at freestandards.org
        Subject:        RE: [printing-jobticket] RE: SM> Job "Actual" 


So in reading all of this as well as undertanding the work going on in
OpenPrinting, I have a general questions that may be obvious to others but
not to me yet.  The assumed communication link for this work has been IPP. 

IPP allows for:
                 a)  Query printer capabilities, 
                 b)  Submit print jobs,
                 c)  Inquire about the status of print jobs and printers,
                 d)  Cancel print jobs.
                 e)  Runs on top of HTTP 1.1. 

IPP does not currently allow for:
                 a)  Support for scan or fax.  There is an active effort 
          to use IPP for Internet fax, though it's incomplete right now.
                     You could probably fake fax through IPP, but I don't 
know if 
          anybody has done it.  Scan definitely isn't supported.
                 b)  Does not support Job tickets.  I know a lot of these 
          is about determined what to do for IPP to support job tickets. 
          We need to determine this in our work as well as see what is 
          being done elsewhere.
                 c)  The format of printer capabilities is all done with 
          independently defined attributes - you query individually by 
          attribute.  They are vendor extensible, but you need to 
          register them through IANA.
                 d)  IPP has the concept of an intent ticket, but it is 
not XML 
          based, and not easily extensible. 
                 e)  The model is also primarily enterprise oriented. What 
          need to be done to support the consumer space.

Am I correct in these observations?

For the Linux standard print model work that the FSG OpenPrinting WG is
doing, our goals are not to "reinvent the wheel" and not simply patch the
current solutions.  Our objectives are to work with the standards working
groups that are already working on various parts of the print model puzzle
to ensure that said standards work well for the Linux environment.  In 
to do this correctly, first, we need to define the basic print path and 
components/standards used along that path.  Second, we need to identify 
is missing from those components and standards.  Finally, we need to be
working with those owners to make the improvements and/or implementing 
specific APIs/components.  As well, the OpenPrinting WG is also about
looking forward.  Questions we need to answer are:  What is the print 
solution we would like for the future?  How can we best provide an
architecture and solution that:
                 a)  Is scalable to allow solution providers (print 
          distributors, and even users) ensure a basic print model, 
          but also build on it easily to extend the model is the 
          direction suited for their business.
                 b)  Makes it easy for a print vendor to have a solution 
          their product.  What I mean here is at a basic print 
          model level, the vendor does not have to apply many, if 
          any, resourses to supporting their product.  They can 
          then focus on the extensibility for their products if 
          required for their business model needs.
                 c)  Is consistent for end-users so they get a consistent 
          experience across the different distributions they may be 

For IPP, I am wondering if we have chosen the correct communication link. 
know this has been the standard used in Linux for sometime, but it seems 
be missing some pretty major parts that we would need.  As well, there are
other standards being developed such as UPnP and PSI that seem to be 
in this same space and seem to be already addressing those needs.

I am not trying to create headaches for everyone.  I just want to make 
we are looking at all of our options. 


Shawn Pratt
Client Software for Device Enablement and Usage
11311 Chinden Blvd., MS 235, Boise, ID 83714
Phone: 208-396-4628
Email: shawn.pratt at hp.com
-----Original Message-----
From: TAYLOR,BOB (HP-Vancouver,ex1) [mailto:robert_b_taylor at hp.com] 
Sent: Thursday, October 10, 2002 5:55 PM
To: 'Hastings, Tom N'; Harry Lewis
Cc: McDonald, Ira; Zehler, Peter; sm at pwg.org;
printing-jobticket at freestandards.org
Subject: [printing-jobticket] RE: SM> Job "Actual" attributes

Since Tom brought up the idea of storing results in the job ticket, we've
been thinking of this as "logging annotations" - i.e., you push these
"actuals" as logging elements that are added to the ticket as it's
processed.  This would look something like:
<?xml version="1.0" encoding="UTF-8"?>
    <mediaSize>A4 </mediaSize>
    <logging timestamp="10/10/2002 4:50pm PDT" logger=>
        <mediaSize>US_Letter</mediaSize>  <!-- service didn't have A4, so 
substituted US Letter -->
With this, you don't have to redefine elements, even if the service 
them (the "actual" is implied by the <logging/> structure), and you can
attach other attributes to the log timestamps, logger IDs, etc.  You have
both the original intent and the logging information in the same ticket 
archival/audit/accounting, but it's simple to strip all the logging out 
re-use the ticket if you want to.
-----Original Message-----
From: Hastings, Tom N [mailto:hastings at cp10.es.xerox.com]
Sent: Thursday, October 10, 2002 4:38 PM
To: Harry Lewis; TAYLOR,BOB (HP-Vancouver,ex1)
Cc: McDonald, Ira; Zehler, Peter; sm at pwg.org;
printing-jobticket at freestandards.org
Subject: RE: SM> Job "Actual" attributes

I like Bob Taylor's idea of using the same PWG Semantic Model Job and
Document Processing attributes (probably not PWG SM Description 
in a different context to indicate what really happened, rather than
inventing more xxx-actual attributes.  The PWG Semantic Model already uses
this approach for Job Creation, in that Document Processing attributes can
be supplied at the Job Level in the Create-Job operation and in each
Send-Document operation.  The IPP Document object extension proposes
re-using the same IPP Job Template attributes as Document Template
attributes, rather than inventing new "document-xxx" Document Template
attributes.  (Also the IPP "document-overrides" and "page-overrides"
collection attributes re-use the existing Job Template attributes for each
override collection value, rather than inventing new name mangling for

However, I'd also like to suggest a streamlining, by having the new Job
Processing Actuals be only the ones that deferred from the ones submitted 
the Job Creation Request.  This would do two good things:  Be much more
compact and provide a useful indication to the user about what happened
differently from what he requested.  I suspect that any defaulting that 
Printer supplied would wind up in the Actuals group, but be of the form
"xxx", not "xxx-default".  If the PDL had a different value and the 
didn't override the PDL, then the actual should be the value from the PDL. 

Of course, the Job Processing, Job Description, Document Processing, and
Document Description attributes that the user submitted should also be in
the Job History in just the form that he submitted (as in the current IPP
Job History for Job Template attributes and soon to be Document Template
attributes - see RFC 2911 section

The FSG Job Ticket API wants to store results in the Job Ticket eventually
as well.


-----Original Message-----
From: Harry Lewis [mailto:harryl at us.ibm.com]
Sent: Thursday, October 03, 2002 09:37
To: TAYLOR,BOB (HP-Vancouver,ex1)
Cc: McDonald, Ira; Zehler, Peter; sm at pwg.org
Subject: RE: SM> Job "Actual" attributes

I'm not opposed to new operations but I'll observe that multiple 
is in keeping with the way IPP is currently structured. 
Harry Lewis 
IBM Printing Systems 

"TAYLOR,BOB (HP-Vancouver,ex1)" <robert_b_taylor at hp.com> 
10/03/2002 09:42 AM 
        To:        "Zehler, Peter" <PZehler at crt.xerox.com>, Harry
Lewis/Boulder/IBM at IBMUS, "McDonald, Ira" <imcdonald at sharplabs.com>,
sm at pwg.org 
        Subject:        RE: SM> Job "Actual" attributes 


I think I prefer the more "operations" or structurally-oriented approach.
The model of having multiple attributes that describe the same "feature" 
multiple states (capabilities, intent, process, logging/audit), etc. seems
fragile and error-prone (hence the current "process" vs. "product"
discrepancies in CIP4 ...).  I'd rather have us define the feature once, 
then define operations or structures that apply the workflow stage
-----Original Message-----
From: Zehler, Peter [mailto:PZehler at crt.xerox.com]
Sent: Thursday, October 03, 2002 4:43 AM
To: 'Harry Lewis'; McDonald, Ira
Cc: sm at pwg.org
Subject: RE: SM> Job "Actual" attributes

I like the concept.  I prefer "actual" to "chosen".  Have you considered 
operations (e.g. "GetActualJobAttributes"  "GetJobsHistory") to accomplish
the same thing.  It would make Printers that implement a job receipt more
explicit.  There would be no need for all the new attributes (i.e.
"ZZZ-actual").  On the other hand using attributes instead of new 
does have the benefit of being able to retrieve both the requested and
actual attributes together and having a static representation that
differentiates the two.  Perhaps using both the "actual" attributes and 
operations might be more explicit. 
Of course there will probably need to be some housekeeping attributes 
to the printer for history management/configuration.  I would prefer that
something like this be documented separately and referenced in the PWG
Semantic Model.  The document would probably be an extension to IPP. 
Peter Zehler 
Xerox Architecture Center 
Email: PZehler at crt.xerox.com 
Voice:    (585) 265-8755 
FAX:      (585) 265-8871 
US Mail: Peter Zehler 
        Xerox Corp. 
       800 Phillips Rd. 
       M/S 128-30E 
       Webster NY, 14580-9701 
-----Original Message-----
From: Harry Lewis [mailto:harryl at us.ibm.com]
Sent: Wednesday, October 02, 2002 11:57 PM
To: McDonald, Ira
Cc: sm at pwg.org
Subject: RE: SM> Job "Actual" attributes

I'm fine with "chosen" vs. "actual"... not as concerned about the name as
the concept. In this case, actual might differ from requested due to
something like a PDL override (so "chosen" seems to fit) or it COULD 
due to some circumstance (like the job was aborted prior to all copies
completing) in which case "actual" seems more apropos. 
Harry Lewis 
IBM Printing Systems 

"McDonald, Ira" <imcdonald at sharplabs.com> 
10/02/2002 07:30 PM 
       To:        Harry Lewis/Boulder/IBM at IBMUS, sm at pwg.org 
       Subject:        RE: SM> Job "Actual" attributes 


Hi Harry,

For what it's worth...

Printer MIB used (from DPA I think...) the terminology of
'Declared' or 'Requested' (for the input) and 'Chosen'
(for what you're calling 'Actual' below).

- Ira McDonald

-----Original Message-----
From: Harry Lewis [mailto:harryl at us.ibm.com]
Sent: Wednesday, October 02, 2002 5:56 PM
To: sm at pwg.org
Subject: SM> Job "Actual" attributes

In IPP, PWG Semantic Model and PSI we have Job Template attributes with
"sister" (supported, default and ready) Printer Description attributes. 
discussing the purpose of a "Job Ticket" in the semantic model, we often
refer to Job Template attributes as the "job ticket" as these carry
production intent. By definition, when queried, Job Template attributes 
return the value associated with each attribute during submission. Thus,
there is no way to query a job (or document) and learn WHAT ACTUALLY
HAPPENED w.r.t. any particular attributed (ex. copies). This is covered by
the JDF job ticket but we have said JDF is too workflow oriented for
(initial) inclusion into the PWG Semantic Model. 

I would like to propose a solution - the addition of a group of Job
Description attributes referred to as "-actual". These could be extensions
to the group of Job Progress attributes or a separate grouping of Job 
(or "Job Completion") attributes. I know, in IPP proper, we don't have the
notion of job "history" (the job "disappears" as soon as it has completed)
so "actuals" would not be very useful. But in the semantic model and PSI
we're trying to overcome this. To the extent that we are reluctant to
embrace a full fledged job ticket, the addition of "-actual" attributes
should go a long way toward providing much of the essential JT 
that was previously missing for non-produciton environments. 

For example: 

| Job Template      |Job Description:Actual|
|   Attribute       |   Value Attribute    |
| copies            | copies-actual        |
| (integer (1:MAX)) | (integer (1:MAX))    |
| finishings        | finishings-actual    |
|(1setOf type2 enum)|(1setOf type2 enum)   |
| sides             | sides-actual         |
| (type2 keyword)   | (type2 keyword)      |
| number-up         | number-up-actual     |
| (integer (1:MAX)) | (integer (1:MAX))    |
| orientation-      |orientation-requested-|
|  requested        |  actual              |
|   (type2 enum)    |  (type2 enum)        |
| media             | media-actual         |
| (type3 keyword |  | (type3 keyword |     |
|    name)          |    name)             |
| printer-resolution| printer-resolution-  |
| (resolution)      |  actual             |
|                   | (resolution)         |
| print-quality     | print-quality-actual |
| (type2 enum)      | (type2 enum)         |

Harry Lewis 
IBM Printing Systems 

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