IPP Mail Archive: RE: IPP> Comments on Media Size Objectives

IPP Mail Archive: RE: IPP> Comments on Media Size Objectives

RE: IPP> Comments on Media Size Objectives

From: Herriot, Robert (Robert.Herriot@pahv.xerox.com)
Date: Tue May 15 2001 - 14:56:42 EDT

  • Next message: Herriot, Robert: "IPP> Canadian Media Sizes"

    I have come to the same conclusion as Paul, namely that the size
    ("8.5x11in")is the only important information and that the name "letter" or
    "foo" is at best informational and at worst a distraction that can make
    someone believe that us-a4.8x11in and wizo-vend-foo-bang.8x11in are
    different.

    > -----Original Message-----
    > From: pmoore@netreon.com [mailto:pmoore@netreon.com]
    > Sent: Thursday, May 10, 2001 2:50 PM
    > To: Hastings, Tom N
    > Cc: don@lexmark.com; McDonald, Ira; 'Harry Lewis'; carl@manros.com;
    > Hastings, Tom N; IMAGING@FORUM.UPNP.ORG; ipp@pwg.org
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    >
    >
    > if the intent is to convey the media size to the app why do
    > we care about vendor
    > names etc. Why isnt the size just sent ("8.5x11in"). Why does
    > the media size
    > attribute have to include a name at all - are lexmark inches
    > somehow different
    > from kinko inches?
    >
    > What is the difference between us-a4.8x11in and
    > wizo-vend-foo-bang.8x11in if the
    > purpuse of this spec is to convey the size of the media. It
    > seems that the
    > intent is not to convey the size of the media but the name of
    > the size too -
    > this is a quite different thing (the requirements dont say
    > anything about
    > conveying the name of the size).
    >
    >
    >
    >
    > "Hastings, Tom N" <hastings@cp10.es.xerox.com> on 05/10/2001
    > 02:21:03 PM
    >
    > To: don@lexmark.com, "McDonald, Ira" <imcdonald@sharplabs.com>
    > cc: "'Harry Lewis'" <harryl@us.ibm.com>, carl@manros.com,
    > "Hastings, Tom N"
    > <hastings@cp10.es.xerox.com>, IMAGING@FORUM.UPNP.ORG,
    > ipp@pwg.org (bcc:
    > Paul Moore/AUCO/US)
    >
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    >
    > I agree with Don that a more user-friendly vendor extension
    > mechanism should
    > be used, such as vend-lexmark, or custom-lexmark, if we need a printer
    > vendor extension mechanism at all.
    >
    > A formal extension mechanism that the IETF uses is important
    > for names in
    > which the entire semantics is *implied* by the name, such as
    > a MIME type.
    > However, for our Media Size Self Describing Names the entire semantics
    > (i.e., dimensions) of the size name is actually contained in the name
    > itself.
    >
    > A more fundamental question is why would a Printer vendor
    > that has a custom
    > media size, not want to put it into our Media Standard now?
    > We'd just add
    > it with no vendor name needed.
    >
    > If the printer vendor invents the size after our standard is
    > published,
    > we've got to have a way to add/register more standard size
    > names anyway, so
    > the Printer vendor just gets the new size registered with the
    > PWG using
    > normal standard syntax without the vendor needing to be
    > identified in the
    > name.
    >
    > Only, if a vendor really wants his name in the media name, do
    > we need to
    > decide how to do that. We can decide then whether this
    > company name is a
    > new Naming Authority field or this company name should be
    > part of the Media
    > Name field. For example, if Lexmark has a new size, say
    > playing-card, that
    > they really want to have the Lexmark name appear, the name could be
    > registered as:
    >
    > lexmark_playing-card_2x4in (If we add Lexmark as a Naming
    > Authority)
    > na_lexmark-playing-card_2x4in (If Lexmark wants to make
    > the name be
    > under the na Naming Authority).
    >
    > Tom
    >
    >
    > -----Original Message-----
    > From: don@lexmark.com [mailto:don@lexmark.com]
    > Sent: Thursday, May 10, 2001 13:27
    > To: McDonald, Ira
    > Cc: 'Harry Lewis'; carl@manros.com; Hastings, Tom N;
    > IMAGING@FORUM.UPNP.ORG; ipp@pwg.org
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    >
    >
    > All:
    >
    > The problem is that if the driver has no knowledge of a new
    > standardized
    > paper
    > size and it tries to parse and display the name, the end user
    > will have
    > absolutely no idea that "vend-641" is Lexmark defined paper
    > size. He might
    > be
    > able to do something with "vend-Lexmark"
    >
    > **********************************************
    > * Don Wright don@lexmark.com *
    > * Chair, Printer Working Group *
    > * Chair, IEEE MSC *
    > * *
    > * Director, Alliances & Standards *
    > * Lexmark International *
    > * 740 New Circle Rd *
    > * Lexington, Ky 40550 *
    > * 859-825-4808 (phone) 603-963-8352 (fax) *
    > **********************************************
    >
    >
    >
    > "McDonald, Ira" <imcdonald%sharplabs.com@interlock.lexmark.com> on
    > 05/10/2001
    > 12:55:01 PM
    >
    > To: "'Harry Lewis'" <harryl%us.ibm.com@interlock.lexmark.com>,
    > carl%manros.com@interlock.lexmark.com
    > cc: "Hastings, Tom N"
    > <hastings%CP10.ES.XEROX.COM@interlock.lexmark.com>,
    > IMAGING%FORUM.UPNP.ORG@interlock.lexmark.com,
    > ipp%pwg.org@interlock.lexmark.com (bcc: Don Wright/Lex/Lexmark)
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    >
    > Hi,
    >
    > A whole lot of IETF protocols (e.g., SLP attribute names) use the
    > universal IETF convention of 'x-nnn-' as a prefix where 'nnn'
    > is the vendors decimal enterprise number assigned by IANA.
    >
    > It's clean and simple and never ambiguous (no two vendors will EVER
    > have the same enterprise number).
    >
    > Cheers,
    > - Ira McDonald
    >
    > -----Original Message-----
    > From: Harry Lewis [mailto:harryl@us.ibm.com]
    > Sent: Thursday, May 10, 2001 10:44 AM
    > To: carl@manros.com
    > Cc: Hastings, Tom N; IMAGING@FORUM.UPNP.ORG; ipp@pwg.org
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    > Well, again, I think it is challenging the elasticity of the main goal
    > which was to establish one authoritative list of STANDARD
    > media sizes. In
    > an XML encoding I can picture distinguishing media name as
    > belonging to a
    > "standard" vs. "private" naming authority. If we MUST accommodate this
    > goal in the compromise syntax, I guess I suggest a convention of the
    > "class" or "naming authority" such as
    >
    > "vend-xxx"
    >
    > where xxx could be the name of a vendor or customer.
    >
    > Again, I believe it would be better to keep the media names
    > in this list
    > we are collecting STANDARD and fairly SIMPLE.
    > ----------------------------------------------
    > Harry Lewis
    > IBM Printing Systems
    > ----------------------------------------------
    >
    >
    >
    >
    > "Carl-Uno Manros" <carl@manros.com>
    > 05/09/2001 10:35 PM
    > Please respond to carl
    >
    >
    > To: "Harry Lewis" <harryl@us.ibm.com>, "Hastings, Tom N"
    > <hastings@CP10.ES.XEROX.COM>
    > cc: <IMAGING@FORUM.UPNP.ORG>, <ipp@pwg.org>
    > Subject: RE: IPP> Comments on Media Size Objectives
    >
    >
    >
    > Harry,
    >
    > I think I have to agree with you on most points. In
    > particular I like your
    > suggestion to change the name as the current name carries too much
    > semantic
    > connotations, which can easily be misinterpreted.
    >
    > The one important issue I still see is whether we want to lay
    > down some
    > rules for how to add "private names" which are not in our
    > list, be it by a
    > vendor or by end customers.
    >
    > Carl-Uno
    >
    > > -----Original Message-----
    > > From: owner-ipp@pwg.org [mailto:owner-ipp@pwg.org]On Behalf Of Harry
    > > Lewis
    > > Sent: Wednesday, May 09, 2001 9:13 PM
    > > To: Hastings, Tom N
    > > Cc: IMAGING@FORUM.UPNP.ORG; ipp@pwg.org
    > > Subject: IPP> Comments on Media Size Objectives
    > >
    > >
    > > 18 objectives for a "2-bit" "name" field!
    > >
    > > Comments...
    > >
    > > 1. We have a compromise, not an optimization (for machine parsing).
    > > Suggest the concept of "facilitate" be stressed over "optimize".
    > >
    > > 4. Edit - "Only include the name in its native units"
    > (delete "each").
    > >
    > > 5. Dump this goal!! (additional units) This has been a rat trap!
    > > The compromise syntax we are developing is too stressed by this
    > > goal. Save this for a full fledged schema.
    > >
    > > 6. I think the notion of "self describing" has been misinterpreted.
    > > Some feel a description should contain more (margins etc.). Some
    > > think "self describing" means easy to read and distinguish. It
    > > might be better to simply state... "The "Standard Media
    > Name" will
    > > contain both a "Name" part and a "Dimension" part."
    > >
    > >
    > > 7,8,9. I think these can all be replaced by simply
    > extending the above
    > > (6) to read "The "Standard Media Name" will contain 3 parts,
    > > 1. Naming Authority
    > > 2. Name
    > > 3. Dimension
    > >
    > > 10. Given (6,7,8,9 - above) this is just stating the obvious. This
    > > registry
    > > is a simple list. If we find stuff we've missed, we
    > help ourselves
    > add
    > > it. If we missed a galaxy or universe our there,
    > somewhere... (i.e.
    > > an entire naming authority) or if we want to establish
    > a new name
    > > space, we can readily do so.
    > >
    > > On and On... I don't know about the rest. Glazed donuts
    > come to mind.
    > > Or... a real schema development effort!
    > >
    > > ----------------------------------------------
    > > Harry Lewis
    > > IBM Printing Systems
    > > ----------------------------------------------
    > >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >



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