RFC Errata
RFC 3382, "Internet Printing Protocol (IPP): The 'collection' attribute syntax", September 2002
Note: This RFC has been obsoleted by RFC 8010, RFC 8011
Source of RFC: ipp (app)
Errata ID: 3024
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Michael Sweet
Date Reported: 2011-11-10
Held for Document Update by: Peter Saint-Andre
Section Appendix A says:
Appendix A: Encoding Example of a Simple Collection (Informative)
The overall structure of the collection value can be pictorially
represented as:
"media-size" =
{ "x-dimension" = 6;
"y-dimension" = 4
}
A simplified view of the encoding would look like this:
Table 6 - Overview Encoding of simple collection
Tag Value Name Value
begCollection media-size ""
memberAttrName "" x-dimension
integer "" 6
memberAttrName "" y-dimension
integer "" 4
endCollection "" ""
Note: "" represents a name or value whose length is 0.
Table 7 - Example Encoding of simple collection
Octets Symbolic Value Protocol comments
field
0x34 begCollection value-tag beginning of the "media-
size" collection attribute
0x000A name- length of (collection)
length attribute name
media-size media-size name name of (collection)
attribute
deBry, et. al. Standards Track [Page 22]
RFC 3382 IPP: The 'collection' attribute syntax September 2002
Octets Symbolic Value Protocol comments
field
0x0000 value- defined to be 0 for this
length type
no value (since value-
length was 0)
0x4A memberAttrName value-tag starts member attribute:
"x-dimension"
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
0x000B value- length of "x-dimension"
length keyword
x-dimension x-dimension value name of 1st collection
member attribute
0x21 integer type value-tag attribute type
0x0000 name- 0 indicates 1setOf
length
no name (since name-length
was 0)
0x0004 value- length of an integer = 4
length
0x0006 value value of 1st collection
member attribute
0x4A memberAttrName value-tag starts a new member
attribute: "y-dimension"
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
deBry, et. al. Standards Track [Page 23]
RFC 3382 IPP: The 'collection' attribute syntax September 2002
Octets Symbolic Value Protocol comments
field
0x000B value- length of the "y-
length dimension" keyword
y-dimension y-dimension value name of 2nd collection
member attribute
0x21 integer type value-tag attribute type
0x0000 name- 0 indicates 1setOf for
length media-size
no name (since name-length
was 0)
0x0004 value- length of an integer = 4
length
0x0004 value value of 2nd collection
member attribute
0x37 endCollection value-tag end of the collection
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
0x0000 value- defined to be 0 for this
length type
no value (since value-
length was 0)
It should say:
Appendix A: Encoding Example of a Simple Collection (Informative)
The overall structure of the collection value can be pictorially
represented as:
"media-size" =
{ "x-dimension" = 15240;
"y-dimension" = 10160
}
A simplified view of the encoding would look like this:
Table 6 - Overview Encoding of simple collection
Tag Value Name Value
begCollection media-size ""
memberAttrName "" x-dimension
integer "" 15240
memberAttrName "" y-dimension
integer "" 10160
endCollection "" ""
Note: "" represents a name or value whose length is 0.
Table 7 - Example Encoding of simple collection
Octets Symbolic Value Protocol comments
field
0x34 begCollection value-tag beginning of the "media-
size" collection attribute
0x000A name- length of (collection)
length attribute name
media-size media-size name name of (collection)
attribute
deBry, et. al. Standards Track [Page 22]
RFC 3382 IPP: The 'collection' attribute syntax September 2002
Octets Symbolic Value Protocol comments
field
0x0000 value- defined to be 0 for this
length type
no value (since value-
length was 0)
0x4A memberAttrName value-tag starts member attribute:
"x-dimension"
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
0x000B value- length of "x-dimension"
length keyword
x-dimension x-dimension value name of 1st collection
member attribute
0x21 integer type value-tag attribute type
0x0000 name- 0 indicates 1setOf
length
no name (since name-length
was 0)
0x0004 value- length of an integer = 4
length
0x3b88 value value of 1st collection
member attribute
0x4A memberAttrName value-tag starts a new member
attribute: "y-dimension"
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
deBry, et. al. Standards Track [Page 23]
RFC 3382 IPP: The 'collection' attribute syntax September 2002
Octets Symbolic Value Protocol comments
field
0x000B value- length of the "y-
length dimension" keyword
y-dimension y-dimension value name of 2nd collection
member attribute
0x21 integer type value-tag attribute type
0x0000 name- 0 indicates 1setOf for
length media-size
no name (since name-length
was 0)
0x0004 value- length of an integer = 4
length
0x27b0 value value of 2nd collection
member attribute
0x37 endCollection value-tag end of the collection
0x0000 name- defined to be 0 for this
length type, so part of 1setOf
no name (since name-length
was 0)
0x0000 value- defined to be 0 for this
length type
no value (since value-
length was 0)
Notes:
Fix examples to use correct units, per PWG 5100.3 definition.