IPP Mail Archive: RE: IPP> How does this ABNF look for the M

IPP Mail Archive: RE: IPP> How does this ABNF look for the M

RE: IPP> How does this ABNF look for the Media Size Self Describi ng Name?

From: Bergman, Ron (Ron.Bergman@Hitachi-hkis.com)
Date: Fri May 04 2001 - 16:22:53 EDT

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    Tom,

    I agree. My point was to cover it in the ABNF but not include a lengthy
    discussion. The ABNF appears to be satisfactory.

            Ron

    -----Original Message-----
    From: Hastings, Tom N [mailto:hastings@cp10.es.xerox.com]
    Sent: Friday, May 04, 2001 12:08 PM
    To: Bergman, Ron
    Cc: ipp (E-mail)
    Subject: RE: IPP> How does this ABNF look for the Media Size Self
    Describi ng Name?

    Ron,

    Don was the person that brought up the point of clarification about how to
    represent a dimension that was less than 1 at Portland which I captured in
    the minutes. Otherwise, there could be two forms:

      0.nnn
      .nnn

    I agree that less than 1 inch (and less than 1 mm) is hardly useful, but we
    should cover that case, especially, for the custom case. And more
    importantly, we certainly don't want to allow other leading zeros though,
    such as 08.5x011in

    The whole idea is that a recipient just does a string match to recognize a
    name, not a conversion to numbers and a compare. So names have a canonical
    syntax for all values.

    Tom

    -----Original Message-----
    From: Bergman, Ron [mailto:Ron.Bergman@Hitachi-hkis.com]
    Sent: Thursday, May 03, 2001 18:19
    To: 'Hastings, Tom N'; ipp (E-mail)
    Subject: RE: IPP> How does this ABNF look for the Media Size Self
    Describi ng Name?

    Tom,

    It is hard to imagine a doument less than an inch wide let alone less than a
    millimeter wide. Maybe in a special label printer, but is this class of
    device going to make use of this standard? Most printers would have many
    such labels on a single sheet. But as long as a description of this
    situation is not required, it can remain in the ABNF.

    Also, in response to Don Wright's email, I have proposed that the "x" be
    changed to a "-".

            Ron

    -----Original Message-----
    From: Hastings, Tom N [mailto:hastings@cp10.es.xerox.com]
    Sent: Thursday, May 03, 2001 3:22 PM
    To: ipp (E-mail)
    Subject: IPP> How does this ABNF look for the Media Size Self Describing
    Name?

    How does this ABNF look for the Media Size Self Describing Name?

    We agreed in Portland that if a size was ever smaller than an inch or a mm,
    the it would have a single zero for the integer part. Otherwise, the
    integer part is without leading zeros. Also the fraction part, if present,
    has no trailing zeros. I left the prefix as a separate token because we
    probably want to mention it in the text as a separate section:

    5.1.1 prefix This string part is present to indicate the name space or
    jurisdiction for the size name in order to prevent name clashes. Examples
    include "na" for North America, "iso" for the International Standards
    Organization, etc.
     

    Thanks,
    Tom

       media-size-self-describing-name = size-name "_" short-dim "x" long-dim
    units
       size-name = prefix "-" lowalpha *( lowalpha | digit | "-" )
       prefix = lowalpha *lowalpha
       short-dim = dim
       long-dim = dim
       units = "in" | "mm"
       dim = integer-part [fraction-part] | "0" fraction-part
       integer-part = non-zero-digit *digit
       fraction-part = "." *digit non-zero-digit
       lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" |
                  "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" |
                  "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z"
       non-zero-digit = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
       digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"



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