IPP Mail Archive: IPP> RE: Revised ABNF per Monday's Phone C

IPP> RE: Revised ABNF per Monday's Phone Conference

From: Bergman, Ron (Ron.Bergman@Hitachi-hkis.com)
Date: Tue May 15 2001 - 18:53:48 EDT

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Tom,

I known we discussed both of your issues, but I do not recall such an
agreement.

It was my understanding that all class names need to be registered as either
"inch class" or "mm class". This was the only way to guarantee their
uniqueness.

And to keep the class names simple, they were to be a single word.

What is the advantage of not adding the class to the ABNF? We must always
update the document to add any new names, and the ABNF can be updated at the
same time.

Ron

-----Original Message-----
From: Hastings, Tom N [mailto:hastings@cp10.es.xerox.com]
Sent: Tuesday, May 15, 2001 11:01 AM
To: Bergman, Ron; Ira McDonald (E-mail); Don Wright (E-mail)
Cc: 'ipp@pwg.org'
Subject: RE: Revised ABNF per Monday's Phone Conference

I believe that we agreed that the mm class names wouldn't need to be
explicitly listed in the ABNF, since most new class names that are
registered will be using the "mm" units. Then we don't have to update the
ABNF, except in the unlikely event that a class name that uses "in" units is
registered.

Also we agreed that the registered class names couldn't have "-" in them,
but could have "." (as in registry path names).

So here is my suggested ABNF instead (which just changes the class2 line):

media-size-self-describing-name =
( class1 "_" size-name "_" short-dim "x" long-dim "in" ) |
( class2 "_" size-name "_" short-dim "x" long-dim "mm" )

class1 = "na" | "asme" | "oe"

class2 = lowalpha *( lowalpha | digit | "." )

size-name = ( lowalpha | digit ) *( lowalpha | digit | "-" )

short-dim = dim

long-dim = dim

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"

-----Original Message-----
From: Bergman, Ron [mailto:Ron.Bergman@Hitachi-hkis.com]
Sent: Tuesday, May 15, 2001 09:18
To: Tom Hastings (E-mail); Ira McDonald (E-mail); Don Wright (E-mail)
Cc: 'ipp@pwg.org'
Subject: Revised ABNF per Monday's Phone Conference

Here is my proposed ABNF to document the agreed restrictions in yesterday's
phone call. I may be missing some of the class names but this should
correctly linl\k each class to only one set of units.

media-size-self-describing-name =
( class1 "_" size-name "_" short-dim "-" long-dim "in" ) |
( class2 "_" size-name "_" short-dim "-" long-dim "mm" )