| Rfc | 3380 |
|---|
| Title | Internet Printing Protocol (IPP): Job and Printer Set Operations |
|---|
| Author | T.
Hastings, R. Herriot, C. Kugler, H. Lewis |
|---|
| Date | September 2002 |
|---|
| Format: | TXT, HTML |
|---|
| Updates | RFC2910, RFC2911 |
|---|
| Status: | PROPOSED STANDARD |
|---|
|
Network Working Group T. Hastings
Request for Comments: 3380 Xerox Corporation
Updates: 2910, 2911 R. Herriot
Category: Standards Track Consultant
C. Kugler
H. Lewis
IBM Corporation
September 2002
Internet Printing Protocol (IPP):
Job and Printer Set Operations
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2002). All Rights Reserved.
Abstract
This document is an OPTIONAL extension to the Internet Printing
Protocol (IPP/1.0 and IPP/1.1). This document specifies 3 additional
OPTIONAL operations for use with the Internet Printing Protocol/1.0
(IPP) and IPP/1.1. The end user, operator, and administrator Set-
Job-Attributes and Set-Printer-Attributes operations are used to
modify IPP Job objects and Printer objects, respectively. The Get-
Printer-Supported-Values administrative operation returns values that
the IPP Printer will accept for setting its "xxx-supported"
attributes.
11.3 Attribute Registrations.......................................35
11.4 Status code Registrations.....................................36
11.5 Out-of-band Attribute Value Registrations.....................36
12 Internationalization Considerations.............................37
13 Security Considerations.........................................37
14 References......................................................38
14.1 Normative References..........................................38
14.2 Informative References........................................38
Appendix A: Allowed Values for Set-Printer-Attributes and Set-Job-
Attributes requests (Normative)........................39
Appendix B: Attributes returned from Get-Printer-Supported-Values
(Normative)............................................50
Appendix C: Description of the Base IPP Documents (Informative)....55
Authors' Addresses.................................................56
Full Copyright Statement...........................................58
Table of Tables
Table 1 - Operation-Id assignments.................................7
Table 2 - Job State Transition Table for the Set-Job-Attributes
operation ..............................................15
Table 3 - Member attributes of "printer-xri-supported" (1setOf
collection) ............................................27
Table 4 - Operation-id assignments................................33
Table 5 - Validation rules for 'Any of "xxx-supported" '..........40
Table 6 - Validation rules for 'From Get-Printer-Supported-Values'41
Table 7 - Values allowed for Job Template Attributes in the Set-Job-
Attributes Operation ...................................42
Table 8 - Values allowed for Job Description Attributes in the Set-
Job-Attributes Operation ...............................43
Table 9 - Values allowed for Printer Job Template Attributes in the
Set-Printer-Attributes Operation .......................44
Table 10 - Values allowed for Printer Description Attributes in the
Set-Printer-Attributes Operation .......................47
Table 11 - Printer Job Template Attributes returned from Get-Printer-
Supported-Values .......................................51
Table 12 - Printer Job Template Attributes returned from Get-Printer-
Supported-Values .......................................51
Table 13 - Printer Description Attributes returned from Get-Printer-
Supported-Values .......................................51
Table 14 - Printer Job Template Attributes returned from Get-Printer-
Supported-Values .......................................52
Table 15 - Printer Job Template Attributes returned from Get-Printer-
Supported-Values .......................................52
Table 16 - Printer Description Attributes returned from Get-Printer-
Supported-Values .......................................53
1 Introduction
This document is an OPTIONAL extension to IPP/1.0 [RFC2565, RFC2566]
and IPP/1.1 [RFC2911, RFC2910]. For a description of the base IPP
documents see Appendix C.
The Internet Printing Protocol (IPP) is an application level protocol
that can be used for distributed printing using Internet tools and
technologies. IPP version 1.1 [RFC2911, RFC2910] focuses on end user
functionality with a few administrative operations included. This
document defines additional OPTIONAL end user, operator, and
administrator Set-Job-Attributes and Set-Printer-Attributes
operations used to modify IPP Job objects and Printer objects,
respectively. It also defines a third Get-Printer-Supported-Values
administrator operation that returns values that the IPP Printer will
accept for setting its "xxx-supported" attributes. The Get-Printer-
Supported-Values operation MUST be supported, if the implementation
supports setting any "xxx-supported" Printer attributes using the
Set-Printer-Attributes operation.
Nine Printer Description attributes are defined:
printer-settable-attributes-supported (1setOf type2 keyword)
job-settable-attributes-supported (1setOf type2 keyword)
document-format-varying-attributes (1setOf type2 keyword)
printer-message-time (integer(MIN:MAX))
printer-message-date-time (dateTime)
printer-xri-supported (1setOf collection)
xri-uri-scheme-supported (1setOf uriScheme)
xri-authentication-supported (1setOf type2 keyword)
xri-security-supported (1setOf type2 keyword)
Three out-of-band values are defined for use with these three
operations: 'delete-attribute' for deleting Job attributes with the
Set-Job-Attributes request, 'not-settable' for use in either the
Set-Job-Attributes or Set-Printer-Attributes responses, and 'admin-
define' for use in the Get-Printer-Supported-Values response.
Two operation attributes: "printer-message-from-operator" (text) and
"job-message-from-operator" (text) are defined to set the
corresponding IPP/1.1 Printer and Job Description attributes with the
same names. These operation attributes may be used with any
operation that affect the Printer or Job object for which an
operation might want to indicate a message. For the Set-Job-
Attributes and Set-Printer-Attributes operations, the client MUST
explicitly set them, rather than using these operation attributes.
A Printer implementation can make the value of some attributes
dependent on the document-format, e.g., "resolution-supported".
2 Terminology
This section defines terminology used throughout this document.
2.1 Conformance Terminology
Capitalized terms, such as MUST, MUST NOT, REQUIRED, SHOULD, SHOULD
NOT, MAY, NEED NOT, and OPTIONAL, have special meaning relating to
conformance as defined in BCP 14, RFC 2119 [RFC2119] and [RFC2911]
section 12.1. If an implementation supports the extension defined in
this document, then these terms apply; otherwise, they do not. These
terms define conformance to this document only; they do not affect
conformance to other documents, unless explicitly stated otherwise.
2.2 Other terminology
This document uses terms such as Job object (or Job), IPP Printer
object (or Printer), "operation", "request", response", "attributes",
"keywords", and "support". These terms have special meaning and are
defined in the model terminology [RFC2911], section 12.2. The
following additional terms are introduced in this document:
READ-ONLY: used in an attribute definition document to indicate that
the attribute MUST NOT be settable using an IPP protocol Set
operation. In other words, the attribute is not settable by
definition.
not-settable: an implementation does not support setting an attribute
(whether or not the attribute's definition is READ-ONLY).
3 Requirements and Use Cases
The following requirements and usage are intended to be met by the
specification in this document.
1. The end-user and the operator need a way to modify a Job that is
in the 'pending' or 'pending-held' state.
Usage: The end-user discovers that he/she forgot to include a
print instruction, such as "finishings" = 'staple' after
submitting a job. Rather than canceling the job and resubmitting
it to the same IPP Printer, the end-user is able to modify the job
on the IPP Printer.
The operator needs to modify a job because it is requesting a
particular kind of media for which there is no more, but the
policy is to print the job on a comparable medium.
2. The system administrator needs a way to re-configure or change the
policy of the IPP Printer remotely.
Usage: The system administrator is adding additional named media
to the supported media list (setting 'name' values to the "media-
supported" Printer attribute).
The system administrator is reducing the capability of the IPP
Printer by removing one of the operations from the supported
operations list, such as Cancel-Job, because the policy is to run
the IPP Printer like a public facsimile machine. After having
removed Cancel-Job from the list of supported operations, an
administrative client needs to be able to display to an
administrator that the implementation is capable of being
reconfigured to support Cancel-Job once again.
The system administrator is remotely configuring the IPP Printer
after installing it, and so is replacing the Printer Description
attributes that have the out-of-band 'no-value' value (see
[RFC2911], section 4.1) with the proper values.
The operator is changing the media loaded in the input tray, and
so is replacing the "media-ready" Job Template Printer attribute
value with the proper values.
4 Definition of the Set operations
The Set-Printer-Attributes operations (as are all Printer operations)
are directed at Printer objects. A client MUST always supply the
"printer-uri" operation attribute in order to identify the correct
target of the operation. These descriptions assume all of the common
semantics of the IPP/1.1 Model and Semantics document [RFC2911],
section 3.1.
The Set-Job-Attributes operations (as are all Job operations) are
directed at Job objects. A client MUST always supply some means of
identifying the Job object in order to identify the correct target of
the operation. That job identification MAY either be a single Job
URI or a combination of a Printer URI with a Job ID, as defined in
[RFC2911]. The IPP object implementation MUST support both forms of
identification for every job. If possible, a client SHOULD use the
Printer URI with a Job ID rather than a Job URI, since the 32-bit
"job-id" is more readily translated to and from other print protocols
that MAY be serving as gateways into or out of the IPP
implementation.
The Set Printer operations are summarized in Table 1:
Table 1 - Operation-Id assignments
Operation Name Operation Brief description
-Id
Set-Printer- 0x0013 Sets attribute values of the target
Attributes Printer object
Set-Job-Attributes 0x0014 Sets attribute values of the target
Job object
Get-Printer- 0x0015 Gets values that are valid for
Supported-Values setting "xxx-supported" attributes
using the Set-Printer-Attributes
operation
4.1 Set-Printer-Attributes Operation
This OPTIONAL operation allows a client to set the values of the
attributes of a Printer object. In the request, the client supplies
the set of Printer keyword attribute names and values that are to be
set. In the response, the Printer object returns success or rejects
the entire request with indications of which attribute or attributes
could not be set.
The Printer object validates the client-supplied attributes in the
Set-Printer-Attributes request. For an attribute to validate, it
MUST meet all of the following rules:
1. The number of attributes supplied by the client MUST NOT exceed
the maximum number that the Printer supports in a Set-Printer-
Attributes request. A Printer MUST accept at least one attribute,
but SHOULD accept a reasonable number in a single Set-Printer-
Attributes request.
Note: There is no way for the client to determine the maximum
number of attributes that the Printer supports in a Set-Printer-
Attributes request, except to try a reasonable number.
2. The Printer MUST support the attribute.
3. The attribute MUST NOT be READ-ONLY, i.e., the definition of the
attribute MUST NOT indicate that the attribute is READ-ONLY (see
Appendix A for an indication of which IPP/1.1 attributes are
READ-ONLY).
4. The attribute MUST be settable in this implementation.
5. The Printer MUST support the value, according to the rules defined
in Appendix A, i.e., each value of each supplied "xxx" attribute
MUST be validated against the value of a corresponding "xxx-
supported" Printer attribute. One of those rules permits an
administrator to set arbitrary 'name' values to those "xxx-
supported" Printer attributes that include the 'name' attribute
syntax if the implementation supports the 'admin-define' out-of-
band value for that "xxx-supported" attribute (see section 8.3 and
Appendix A).
6. The attribute's values MUST NOT conflict with the values of other
Printer attributes, including ones being set in this same
operation.
If any of the supplied attributes are not validate, the Printer
object MUST reject the entire operation; the Printer object MUST NOT
partially set some of the supplied attributes. In other words, after
the operation, all the supplied attributes MUST be set or none of
them MUST be set, thus making the Set-Printer-Attributes an atomic
operation.
The Printer MUST accept this operation when its READ-ONLY "printer-
state" attribute (see [RFC2911], section 4.4.11) is 'idle' or
'stopped', and SHOULD accept it when the value is 'processing'. The
Printer MUST accept this operation for any of the values of the
Printer object's READ-ONLY "printer-state-reasons" and "printer-is-
accepting-jobs" attributes, unless explicitly defined otherwise in
the definition of these attributes' values.
This operation MUST NOT change the value of attributes not specified
in the operation unless the definition of the attribute explicitly
specifies such side-effects. For example, this document explicitly
specifies that when this operation sets "printer-message-from-
operator", the Printer also MUST set the READ-ONLY "printer-message-
time" and READ-ONLY "printer-message-date-time" attributes to the
time of the operation as a side effect. In particular, if this
operation changes an "xxx-default" attribute, the new value MUST be
in the "xxx-supported" attributes or the request MUST contain a new
value for "xxx-supported", which contains the new value for the
"xxx-default". Otherwise, the Printer MUST reject the operation. In
general, Printer attribute definitions that are settable will not
define side-effects on other attributes that are settable, only side
effects on READ-ONLY attributes, if any.
4.1.1 Settable and READ-ONLY Printer Description attributes
If the Printer supports the Set-Printer-Attributes operation, then it
SHOULD support the setting of:
all Job Template Default ("xxx-default") attributes
all Job Template Supported ("xxx-supported") attributes
all Job Template Ready ("xxx-ready") attributes
that the implementation supports (see [RFC2911] section 4.2 and
extensions).
Some Printer Description attributes (see [RFC2911] section 4.4) MUST
NOT be settable, i.e., they are defined to be READ-ONLY. An
attribute marked as "READ-ONLY" in the Printer Description attribute
table in Appendix A is such an attribute. The Printer attributes
that are not marked as "READ-ONLY" MAY be settable using the Set-
Printer-Attributes operation, depending on implementation.
Note: From now on, all extensions that define new object attributes
will indicate whether or not the attributes are READ-ONLY, by
including the "READ-ONLY" adjective in their descriptions and/or
explicitly stating whether they MAY be settable.
The current values of each "xxx-supported" Printer attribute MUST
reflect the current policy for support of the corresponding "xxx"
attribute. If an "xxx-supported" Printer attribute is settable in an
implementation, then its value(s) MUST affect the behavior of the
implementation. If an "xxx-supported" Printer attribute is defined
to be READ-ONLY or is not-settable in an implementation, then its
values MUST NOT be settable using the Set-Printer-Attributes
operation. Consider the following examples:
For example, if the "operations-supported" Printer Description
attribute (see [RFC2911] section 4.4.15) is settable in a
particular implementation, then changing its value with a Set-
Printer-Attributes operation MUST affect the operations that the
implementation accepts or rejects. Such an implementation will
need to be able to reject values for operations that it contains
no code support for (see section 4.3). If the "operations-
supported" Printer Description attribute is not settable in a
particular implementation, then that implementation MUST reject an
attempt to set it with a Set-Printer-Attributes operation, return
the 'client-error-attributes-not-settable' status code (see
section 7.1), and return the "operations-supported" attribute,
with the out-of-band 'not-settable' value in the Unsupported
Attributes Group.
As another example, consider an implementation in which the
"media-default" and "media-supported" are settable. If a client
supplies a Set-Printer-Attributes request that contains the
"media-default" attribute with a value that is not a member of the
Printer's "media-supported" attribute, the Printer MUST reject the
request and return the "client-error-conflicting-attributes"
status code with the "media-default" and "media-supported"
attributes and their values (see [RFC2911] section 3.1.7).
As a third example, if a client supplies a Set-Printer-Attributes
request that contains both the "media-default" and the "media-
supported" attributes, but includes a value in the "media-default"
that is not a member of the supplied "media-supported" attribute,
the Printer MUST reject the request and return the "client-error-
conflicting-attributes" status code with the "media-default" and
"media-supported" attributes and their values (see [RFC2911]
section 3.1.7).
Access Rights: The authenticated user (see [RFC2911] section 8.3)
performing this operation must be an operator or administrator of the
Printer object (see [RFC2911] Sections 1 and 8.5). Most Printer
attributes will require administrator access rights to set, such as
"xxx-supported", while some will require operator access rights only,
such as "media-ready" and "printer-message-from-operator". Which
attributes require which access rights depends on implementation, and
MAY depend on site policy.
4.1.2 Set-Printer-Attributes Request
The following sets of attributes are part of the Set-Printer-
Attributes Request:
Group 1: Operation Attributes
Natural Language and Character Set:
The "attributes-charset" and "attributes-natural-language"
attributes, as described in [RFC2911], section 3.1.4.1.
Target:
The "printer-uri" (uri) operation attribute, which is the
target for this operation, as described in [RFC2911], section
3.1.5.
Requesting User Name:
The "requesting-user-name" (name(MAX)) attribute SHOULD be
supplied by the client, as described in [RFC2911], section 8.3.
"document-format" (mimeMediaType):
The client OPTIONALLY supplies this attribute. The Printer
object MUST support this attribute. This attribute is useful
for a client to select the document-format to which the
attribute modification should be applied. A Printer
implementation MAY allow some attributes to have different
values for each document format that it supports. See
[RFC2911], section 3.2.5.1 "Get-Printer-Attributes Request".
If the client includes this attribute, the Printer MUST change
the supplied attributes for the document format specified by
this attribute. If a supplied attribute is a member of the
"document-format-varying-attributes" (i.e., the attribute
varies by document format, see section 6.3), the Printer MUST
change the supplied attribute for the document format specified
by this attribute, but not for other document formats. If a
supplied attribute isn't a member of the "document-format-
varying-attributes" (i.e., it doesn't vary by document format),
the Printer MUST change the supplied attribute for all document
formats.
If the client omits this attribute, the Printer MUST change the
supplied attributes for all document formats, whether or not
they vary by document-format.
If the client supplies a value for the "document-format"
Operation attribute, that is either 'application/octet-stream'
or not supported by the Printer, i.e., is not among the values
of the Printer object's "document-format-supported" attribute,
the Printer object MUST reject the operation and return the
'client-error-document-format-not-supported' status code.
Note: the document-format 'application/octet-stream' is the
union of several document-formats (see [RFC2911] section
3.2.5.1, Get-Printer-Attributes) and is not a true document-
format.
Group 2: Printer Attributes
The client MUST supply a set of Printer attributes with one or
more values (including explicitly allowed out-of-band values) as
defined in [RFC2911] section 4.2 Job Template Attributes ("xxx-
default", "xxx-supported", and "xxx-ready" attributes), section
4.4 Printer Description Attributes, and any attribute extensions
supported by the Printer. The value(s) of each Printer attribute
supplied in Group 2 replaces the value(s) of the corresponding
Printer attribute on the target Printer object. For attributes
that can have multiple values (1setOf), all values supplied by the
client replace all values of the corresponding Printer object
attribute. If a Printer object attribute had not yet been
configured, and so assumed the 'no-value' out-of-band value (see
[RFC2911] section 4.1), the supplied value(s) replaces the 'no-
value' value.
4.1.3 Set-Printer-Attributes Response
The Printer object returns the following sets of attributes as part
of the Get-Printer-Attributes Response:
Group 1: Operation Attributes
Status Message:
In addition to the REQUIRED status code returned in every
response, the response OPTIONALLY includes a "status-message"
(text(255)) and/or a "detailed-status-message" (text(MAX))
operation attribute, as described in [RFC2911] sections 3.1.6
and 13.
Natural Language and Character Set:
The "attributes-charset" and "attributes-natural-language"
attributes, as described in [RFC2911], section 3.1.4.2.
Group 2: Unsupported Attributes
See [RFC2911], section 3.1.7, for details on returning Unsupported
Attributes.
If some of the attributes in the operation fail to validate, the
Printer MUST reject the operation, MUST NOT change any Printer
attributes, and MUST return the indicated status code below. In
this group, the Printer MUST also return all attributes that fail
to validate. The following are the reasons that an attribute
fails to validate and the value returns for the attribute, along
with the indicated status code and order of detection:
1. The number of attributes supplied by the client exceeds the
maximum number that the Printer supports in a Set-Printer-
Attributes request: return the 'client-error-request-entity-
too-large' (see [RFC2911], section 13.1.4.9).
2. The Printer doesn't support the attribute: return the attribute
with the "out-of-band" value 'unsupported' (see [RFC2911]
section 3.1.7 and [RFC2910]) and the 'client-error-attributes-
or-values-not-supported (see [RFC2911], section 13.1.4.12).
3. The attribute is either READ-ONLY (in its definition) or is
not-settable in this implementation: return the attribute with
the "out-of-band" value 'not-settable' (see section 8.1) and
the 'client-error-attributes-not-settable' status code (see
section 7.1).
4. The Printer doesn't support the value: if the attribute in the
operation has a single value, return it. If the attribute in
the operation is multi-valued, return only those values in a
1setOf that are not supported. Return the 'client-error-
attributes-or-values-not-supported' status code (see [RFC2911],
section 13.1.4.12).
5. The values of some of the supplied attributes conflict with one
another and/or other Printer attribute values not being set: if
the conflicting attribute in the operation has a single value,
return the attribute and the value. If the attribute in the
operation is multi-valued, return only the attribute and those
values in a 1setOf that are conflicting with other attributes.
Return the 'client-error-conflicting-attributes' status code
(see [RFC2911], section 13.1.4.15).
4.2 Set-Job-Attributes Operation
This OPTIONAL operation allows a client to set the values of the
attributes of a Job object. In the request, the client supplies the
set of Job keyword attribute names and values that are to be set. In
the response, the IPP object returns success or rejects the entire
request with indications of which attribute or attributes could not
be set.
This operation is almost identical to the Set-Printer-Attributes
operation and follows the same rules for validation (see section
4.1). The only differences are that the Set-Job-Attributes operation
is directed at a Job object rather than a Printer object, there is no
"document-format" operation attribute used when setting a Job object,
the operation can add an attribute to the (Job) object, the 'delete-
attributes' out-of-band value is permitted to remove an attribute,
and the validation is the same as the Job Creation operations
(Print-Job, Print-URI, and Create-Job), i.e., depends on the "xxx-
supported" Printer Description attributes (see [RFC2911] section
3.1). Using the Set-Printer-Attributes operation, the administrator
can set arbitrary 'name' values to those "xxx-supported" Printer
attributes, that include the 'name' attribute syntax, if the
implementation supports the 'admin-define' out-of-band value for that
"xxx-supported" attribute (see section 8.3 and Appendix A). However,
the Set-Job-Attributes cannot be used to add unsupported names to the
Job object.
If a client supplies a job attribute in a Set-Job-Attributes request
that the Printer supports, and the job was originally submitted
without supplying that attribute, the Printer adds the attribute to
the Job object.
If the client supplies a job attribute with the "out-of-band" value
'delete-attribute' (see section 8.2), then the Printer MUST remove
the attribute and all of its values from the Job object, if present.
The semantic effect of the client supplying the 'delete-attribute'
value in a Set-Job-Attributes operation MUST be the same as if the
attribute had not been supplied with the Job object in the Job
Creation operation, i.e., the Printer applies its default attribute
or behavior with lower precedence that the PDL (see the beginning of
[RFC2911] section 4.2 and [RFC2911] 3.2.1.1). Any subsequent query
of the Job object using Get-Job-Attributes or Get-Jobs, MUST NOT
return any attribute that has been deleted using the 'delete-
attribute' out-of-band value. However, a client can re-establish
such a deleted Job attribute with any supported value(s), using a
subsequent Set-Job-Attributes operation.
If the client supplies an attribute in a Set-Job-Attributes request
with the 'delete-attribute' value and that attribute is not present
on the Job object, the Printer ignores that supplied attribute in the
request, does not return the attribute in the Unsupported Attributes
group, and returns the 'successful-ok' status code, if there are no
other problems with the request.
The validation of the Set-Job-Attributes request is performed by the
Printer as if the job had been submitted originally with the new
attribute values (and the deleted attributes removed) and with "ipp-
attribute-fidelity" set to 'true', i.e., all modified attributes Job
attributes and values MUST be supported in combination with the Job
attributes not modified. If such a Job Creation operation would have
been accepted, then the Set-Job-Attributes MUST be accepted. If such
a Job Creation operation would have been rejected, then the Set-Job-
Attributes MUST be rejected and the Job MUST be unchanged. In
addition, if any of the supplied attributes are not supported, are
not settable, or the values are not supported, the Printer object
MUST reject the entire operation; the Printer object MUST NOT
partially set some of the supplied attributes. In other words, after
the operation, all the supplied attributes MUST be set or none of
them MUST be set, thus making the Set-Job-Attributes an atomic
operation.
The IPP object MUST accept or reject this operation when the Job's
READ-ONLY "job-state" attribute has the values shown in Table 2. The
job's current state MUST affect whether the IPP object accepts or
rejects the request. For example, in the case where the operation
creates a request for unavailable resources, the Job transitions to a
new state. Table 2 shows the allowed behaviors in each job state and
the transitions.
Table 2 - Job State Transition Table for the Set-Job-Attributes
operation
Current New IPP object's response status code
"job-state" "job-state" and "action":
'pending' 'pending' 'successful-ok'
'pending' 'pending-held' 'successful-ok' - needed resources
are not ready
'pending-held' 'pending-held' 'successful-ok'
'pending-held' 'pending' 'successful-ok' - needed resources
are ready
'processing' 'processing' 'successful-ok' or 'client-error-
not-possible' depending on
implementation, including the
attributes being set, whether the
job has started marking media,
etc.
'processing- 'processing- 'successful-ok' or 'client-error-
stopped' stopped' not-possible' depending on
implementation, including the
attributes being set, whether the
job has started marking media,
etc.
'completed' 'completed' 'client-error-not-possible'
'canceled' 'canceled' 'client-error-not-possible'
'aborted' 'aborted' 'client-error-not-possible'
This operation MUST NOT change the value of attributes not specified
in the operation unless the definition of the attribute explicitly
specifies such side-effects. In general, Job attribute definitions
that are settable will not define side-effects on other attributes
that are settable, only side effects on READ-ONLY attributes, if any.
4.2.1 Settable and READ-ONLY Job Description attributes
If the Printer supports the "job-message-from-operator" Job
Description attribute (see [RFC2911] section 4.3.16) and the client
explicitly supplies a new value for the "job-message-from-operator"
Job Description attribute in Group 2 in the Set-Job-Attributes
request, then the Printer MUST set the "job-message-from-operator"
Job Description attribute to this new value.
If the Printer supports the Set-Job-Attributes operation, then it
SHOULD support the setting of:
all Job Template job ("xxx") attributes
that the implementation supports (see [RFC2911] section 4.2 and
extensions).
Some Job Description attributes (see [RFC2911] section 4.3) MUST NOT
be settable, i.e., they are defined to be READ-ONLY. An attribute
marked as "READ-ONLY" in the Job Description attribute table in
Appendix A is such an attribute. The Job attributes not marked as
"READ-ONLY" MAY be settable using the Set-Job-Attributes operation,
depending on implementation.
Note: From now on, all extensions that define new object attributes
will indicate whether or not the attributes are READ-ONLY, by
including the "READ-ONLY" adjective in their descriptions and/or
explicitly stating whether they MAY be settable.
Access Rights: The authenticated user (see [RFC2911] section 8.3)
performing this operation must either be the job owner (as determined
in the Job Creation operation) or an operator or administrator of the
Printer object (see [RFC2911] Sections 1 and 8.5).
4.2.2 Set-Job-Attributes Request
The following sets of attributes are part of the Set-Job-Attributes
Request:
Group 1: Operation Attributes
Natural Language and Character Set:
The "attributes-charset" and "attributes-natural-language"
attributes as described in [RFC2911], section 3.1.4.1.
Target:
Either (1) the "printer-uri" (uri) plus "job-id"
(integer(1:MAX)) or (2) the "job-uri" (uri) operation
attribute(s), which defines the target for this operation as
described in [RFC2911], section 3.1.5.
Requesting User Name:
The "requesting-user-name" (name(MAX)) attribute SHOULD be
supplied by the client, as described in [RFC2911], section 8.3.
Group 2: Job Attributes
The client MUST supply a set of Job attributes with one or more
values (including explicitly allowed out-of-band values) as
defined in [RFC2911], section 4.2, Job Template Attributes ("xxx"
attributes), section 4.3, Job Description Attributes, and any
attribute extensions supported by the Printer. The value(s) of
each Job attribute supplied in Group 2 replaces the value(s) of
the corresponding Job attribute on the target Job object. For
attributes that can have multiple values (1setOf), all values
supplied by the client replace all values of the corresponding Job
object attribute.
If the client supplies an "xxx" attribute with the 'delete-
attribute' out-of-band value (see section 8.2), the Printer MUST
remove the "xxx" attribute from the Job object, if present.
4.2.3 Set-Job-Attributes Response
The IPP object returns the following sets of attributes as part of
the Set-Job-Attributes Response:
Group 1: Operation Attributes
Status Message:
In addition to the REQUIRED status code returned in every
response, the response OPTIONALLY includes a "status-message"
(text(255)) and/or a "detailed-status-message" (text(MAX))
operation attribute as described in [RFC2911], sections 3.1.6
and 13.
Natural Language and Character Set:
The "attributes-charset" and "attributes-natural-language"
attributes as described in [RFC2911], section 3.1.4.2.
Group 2: Unsupported Attributes
See [RFC2911], section 3.1.7, for details on returning Unsupported
Attributes.
If some of the attributes in the operation fail to validate, the
Printer MUST reject the operation, MUST NOT change any Job
attributes, and MUST return the indicated status code below. In
this group, the Printer MUST also return all attributes that fail
to validate. The following are the reasons that an attribute
fails to validate and the value returns for the attribute, along
with the indicated status code and order of detection:
1. The number of attributes supplied by the client exceeds the
maximum number that the Printer supports in a Set-Printer-
Attributes request: return the 'client-error-request-entity-
too-large' (see [RFC2911], section 13.1.4.9).
2. The Printer doesn't support the attribute: return the attribute
with the 'unsupported' out-of-band attribute value (see
[RFC2911], section 3.1.7 and [RFC2910]) and the 'client-error-
attributes-or-values-not-supported (see [RFC2911], section
13.1.4.12).
3. The attribute is READ-ONLY (in its definition) or is not-
settable in this implementation: return the attribute with the
'not-settable' out-of-band attribute value (see section 8.1)
and the 'client-error-attributes-not-settable' status code (see
section 7.1).
4. The Printer doesn't support the value: if the attribute in the
operation has a single value return it. If the attribute in
the operation is multi-valued, return only those values in a
1setOf that are not supported. Return the 'client-error-
attributes-or-values-not-supported' status code (see [RFC2911],
section 13.1.4.12).
5. The values of some of the supplied attributes conflict with one
another and/or other Job attribute values not being set: if
the conflicting attribute in the operation has a single value,
return the attribute and the value. If the attribute in the
operation is multi-valued, return only the attribute and those
values in a 1setOf that are conflicting with other attributes.
Return the 'client-error-conflicting-attributes' status code
(see [RFC2911],y section 13.1.4.15).
4.3 Get-Printer-Supported-Values Operation
This OPTIONAL operation allows a client to request the values that
the Printer allows in the Set-Printer-Attributes operation for "xxx-
supported" attributes. If the Printer supports the Set-Printer-
Attributes operation AND some of its "xxx-supported" Printer
attributes are settable, then the Printer MUST also support this
operation.
The Printer MUST return in the Get-Printer-Supported-Values response,
those, and only those, "xxx-supported" Printer attributes that it
supports setting with the Set-Printer-Attributes operation.
Furthermore, if a client requests the value of an attribute that is
not settable or is not supported (as in the Get-Printer-Attributes
response), the Unsupported Attributes Group of the response NEED NOT
contain the "requested-attributes" operation attribute with any such
requested (attribute keyword) values.
This operation has identical request/response attributes to the Get-
Printer-Attributes operation in IPP/1.1 [RFC2911]. The operation
also behaves identically to the Get-Printer-Attributes operation in
IPP/1.1 [RFC2911], with the following exceptions:
1. The Get-Printer-Supported-Values operation supports only "xxx-
supported" attributes.
2. The Get-Printer-Attributes operation returns the few "xxx-
supported" attributes that are defined to be single valued, such
as "page-ranges-supported" (boolean) or "pdl-override-supported"
(type2 keyword), as single values, while Get-Printer-Supported-
Values returns the possible values that can be set as a 1setOf of
the same attribute syntax type (See Appendix B: Attributes
returned from Get-Printer-Supported-Values).
3. The Get-Printer-Attributes operation returns the current values of
requested attributes, while the Get-Printer-Supported-Values
operation returns the values that are inherently supported by the
implementation code, i.e., the values that an administrative
client can set in a Set-Printer-Attributes request.
4. The Get-Printer-Attributes operation returns the current values of
requested "xxx-supported" attributes that the Printer is
configured to accept in Job Creation operations, including
additional values defined by the administrator, while the Get-
Printer-Supported-Values operation returns only the values of
"xxx-supported" attributes that are inherently supported by the
implementation and does not return any additional values defined
by the administrator, where the implementation supports the
'admin-define' out-of-band value.
5. The Get-Printer-Attributes never returns the 'admin-define' out-
of-band attribute value, while the Get-Printer-Supported-
Attributes operation does, if the implementation allows the
administrator to define name values by setting that "xxx-
supported" attribute with any 'name' value(s).
6. The Get-Printer-Attributes operation only requires end-user access
rights, while the Get-Printer-Supported-Values requires
administrator access rights.
Access Rights: The authenticated user (see [RFC2911], section 8.3)
performing this operation must be an administrator of the Printer
object (see [RFC2911], Sections 1 and 8.5).
4.3.1 Definition of the usage of the 'admin-define' out-of-band
attribute value
If the Set-Printer-Attributes operation allows the System
Administrator to define arbitrary 'name' values for an "xxx-
supported" attribute, then the Get-Printer-Supported-Values operation
MUST return the 'admin-define' out-of-band attribute value (see
section 8.3) as one of the values of the "xxx-supported" attribute.
In other words, the 'admin-define' out-of-band attribute value
indicates that the Printer implementation supports clients setting
arbitrary 'name' attribute syntax values for that "xxx-supported"
attribute using the Set-Printer-Attributes operation, as long as the
attribute is defined with the 'name' attribute syntax.
For example, if the Get-Printer-Supported-Values operation returns
several keywords as the value of the "media-supported" attribute,
then the Set-Printer-Attributes operation MUST accept any of these
keywords as values for the "media-supported" attribute. If the Get-
Printer-Supported-Values operation returns an 'admin-define' out-of-
band attribute value as one of the values of the "media-supported"
attribute, then the Set-Printer-Attributes operation MUST accept any
value whose attribute syntax is 'name', as a value for the "media-
supported" attribute (provided that the user is properly
authenticated to use the Set-Printer-Attributes operation, e.g., has
administrative access rights).
The Get-Printer-Supported-Values MAY return the 'admin-define' out-
of-band attribute value for any IPP/1.1 or extension Job Template
attribute if the implementation supports allowing the System
Administrator to add values to the "xxx-supported" attribute using
the Set-Printer-Attributes operation. In this case, the Printer MUST
accept any 'name' value of the correct attribute syntax in a Set-
Printer-Attributes operation that is setting that attribute. For
"xxx-supported" attributes that are defined with a choice of
attribute syntaxes, such as 'keyword | name', it is the 'name'
attribute syntax that the System Administrator can use to add new
values, not the 'keyword' attribute syntax. For IPP/1.1, this
requirement includes the following Job Template attributes:
media-supported
job-hold-until-supported
job-sheets-supported
Implementations that support additional Job Template attributes that
include the 'name' attribute syntax, MAY use the 'admin-define' out-
of-band value with them.
If the 'admin-define' out-of-band attribute value is not one of the
values of an "xxx-supported" attribute returned in a Get-Printer-
Supported-Values response, then the Printer MUST NOT allow the Set-
Printer-Attributes operation for that attribute to contain a value
that is not one of the explicit 'keyword' or 'name' values returned
in a Get-Printer-Supported-Values response.
See Appendix B: Attributes returned from Get-Printer-Supported-Values
for a full list of values returned by this operation.
5 New Operation attributes
This section defines new operation attributes for use with the
IPP/1.1 operations indicated. As new operations are defined, they
will also indicate explicitly whether these operation attributes are
defined for use with them.
5.1 printer-message-from-operator (text(127))
The Printer SHOULD support this Operation attribute in following
operations if it supports the corresponding "printer-message-from-
operator" Printer Description attribute.
Pause-Printer
Resume-Printer
Purge-Jobs
The client OPTIONALLY supplies this Operation attribute in the above
operations. The value of this attribute is a message from the
operator about the Printer object on which the operator is performing
the operation. If this operation attribute is supported, the Printer
copies the value to its "printer-message-from-operator" Printer
Description attribute (see [RFC2911], section 4.4.25), even if this
Operation attribute is a zero-length text value or consists solely of
white space.
If the Printer supports this operation attribute, it MUST support
both a zero-length text value and the 'no-value' out-of-band value
(see [RFC2911] section 4.1) to indicate that the operator has sent no
message. In this case, the Printer sets the value of the "printer-
message-from-operator" to the zero-length value or 'no-value' out-
of-band value, respectively. If the client queries the "printer-
message-from-operator" Printer attribute, the Printer returns the
attribute with the zero-length value or the 'no-value' value,
respectively.
In addition, the Printer automatically copies:
1. the value of its "printer-up-time" attribute (see [RFC2911],
section 4.4.29) to its "printer-message-time" attribute,
2. the value of its printer-current-time" (dateTime) attribute (see
[RFC2911], section 4.4.30) to its "printer-message-date-time"
attribute, if supported.
If the client omits this operation attribute, the Printer does not
change the value of its "printer-message-from-operator", "printer-
message-time" and "printer-message-date-time" Printer Description
attributes.
The "printer-message-from-operator" operation attribute MUST NOT be
supported as an operation attribute for the Set-Printer-Attributes
operation. If the operator wants to set the Printer's "printer-
message-from-operator" Printer Description attribute when issuing the
Set-Printer-Attributes operation, the client supplies the "printer-
message-from-operator" explicitly with its new value as one of the
Printer Description attributes in Group 2 in the request; the Printer
also updates its "printer-message-time" and "printer-message-date-
time" Printer Description attributes. If the client does not
explicitly supply the "printer-message-from-operator" with its new
value in the Set-Printer-Attributes request, the Printer leaves the
value of the Printer's "printer-message-from-operator" Printer
Description attribute unchanged.
5.2 job-message-from-operator (text(127))
The Printer SHOULD support this Operation attribute in following
operations if it supports the corresponding "job-message-from-
operator" Job Description attribute.
Cancel-Job
Hold-Job
Release-Job
Restart-Job
The client OPTIONALLY supplies this attribute in the above
operations. The value of this attribute is a message from the
operator about the Job object on which the operator has just
performed an operation. If supported, the Printer copies the value
to the Job's "job-message-from-operator" Job Description attribute
(see [RFC2911], section 4.3.16) (even if this Operation attribute is
a zero-length text value or consists solely of white space).
If the Printer supports this operation attribute, it MUST support
both a zero-length text value and the 'no-value' out-of-band value
(see [RFC2911], section 4.1), to indicate that the operator has sent
no message. In this case, the Printer sets the value of the "job-
message-from-operator" to the zero-length value or 'no-value' out-
of-band value, respectively. If the client queries the "job-
message-from-operator" Job attribute, the IPP object returns the
attribute with the zero-length value or the 'no-value' value,
respectively.
If the client omits this attribute, the Printer does not change the
value of its "job-message-from-operator" Job Description attribute.
Note: There are no corresponding 'job-message-time" and "job-
message-date-time" Job Description attributes, since the usual
lifetime of a job is limited.
The "job-message-from-operator" operation attribute MUST NOT be
supported as an operation attribute for the Set-Job-Attributes
operation. If the operator wants to set the Job's "job-message-
from-operator" Job Description attribute when issuing the Set-Job-
Attributes operation, the client MUST supply the "job-message-from-
operator" with its new value as one of the Job Description attributes
in Group 2 in the request. Otherwise, the Printer leaves the value
of the Job's "job-message-from-operator" Job Description attribute
unchanged by not explicitly setting the attribute. If the client
does not explicitly supply the "job-message-from-operator" with its
new value in the Set-Job-Attributes request, the Printer leaves the
value of the Job's "job-message-from-operator" Job Description
attribute unchanged.
6 New Printer Description Attributes
The following new Printer Description attributes are needed to
support the new operations defined in this document.
6.1 printer-settable-attributes-supported (1setOf type2 keyword)
This REQUIRED READ-ONLY Printer Description attribute identifies the
Printer object attributes that are settable in this implementation,
i.e., that are settable using the Set-Printer-Attributes operations
(see section 4.1). This attribute MUST be supported if the Set-
Printer-Attributes operations is supported. The Printer MUST reject
attempts to set any Printer attributes that are not one of the values
of this attribute, returning the 'client-error-attributes-not-
settable' status code (see section 7.1). The value of this attribute
MAY depend on the value of the "document-format" operation attribute
supplied in the Get-Printer-Attributes operation (see [RFC2911],
section 3.2.5.1).
Standard keyword values are:
'none': There are no settable Printer attributes.
'xxx': Where 'xxx' is any of the keyword attribute names allowed
by section 4.1.1.
6.2 job-settable-attributes-supported (1setOf type2 keyword)
This REQUIRED READ-ONLY Printer Description attribute identifies the
Job object attributes that are settable in this implementation, i.e.,
that are settable using the Set-Job-Attributes operation (see section
4.2). This attribute MUST be supported if the Set-Job-Attributes
operations are supported. The Printer MUST reject attempts to set
any Job attributes that are not one of the values of this attribute,
returning the 'client-error-attributes-not-settable' status code (see
section 7.1).
Standard keyword values are:
'none': There are no settable Job attributes.
'xxx': Where 'xxx' is any of the keyword attribute names allowed
by section 4.2.1.
6.3 document-format-varying-attributes (1setOf type2 keyword)
This OPTIONAL READ-ONLY Printer Description attribute contains a set
of attribute name keywords. This attribute SHOULD be supported by a
Printer object if the Printer object has Printer attributes whose
value vary depending on document format (see [RFC2911], Get-Printer-
Attributes operation). This attribute specifies which attribute
values can vary by document-format. If an attribute's name, "xxx",
is a member of this attribute and the value of attribute "xxx" is
changed with the Set-Printer-Attributes operation that included the
"document-format" operation attribute, then the Printer MUST change
the value for the specified document format and no other document
formats (see section 4.1.2). If an attribute's name, "xxx", is not a
member of this attribute and the value of attribute "xxx" is changed
with the Set-Printer-Attributes operation, then the attribute is
changed for all document formats (whether or not the client supplied
the "document-format" operation attribute).
6.4 printer-message-time (integer(MIN:MAX))
This OPTIONAL READ-ONLY Printer Description attribute contains the
time that the Printer's "printer-message-from-operator" was changed
by the operator using any operation where the client supplied the
"printer-message-from-operator" operation attribute (see section 5.1)
or was explicitly set using the Set-Printer-Attributes operation (see
section 4.1). This attribute allows the users to know when the
"printer-message-from-operator" Printer Description attribute was
last set.
The Printer sets the value of this attribute by copying the value of
the Printer's "printer-up-time" attribute (see [RFC2911], section
4.3.14). If the Printer resets its "printer-up-time" attribute to 1
on power-up, then it MUST change the value of the "printer-message-
time" to 0 or a negative number as specified in [RFC2911], section
4.3.14.
Note: This attribute helps users better understand the context for
the "printer-message-from-operator" message.
6.5 printer-message-date-time (dateTime)
This OPTIONAL READ-ONLY Printer Description attribute contains the
date and time that the Printer's "printer-message-from-operator" was
changed by the operator, using any operation where the client
supplied the "printer-message-from-operator" operation attribute (see
section 5.1) or was explicitly set using the Set-Printer-Attributes
operation (see section 4.1). This attribute allows the users to know
when the "printer-message-from-operator" Printer Description
attribute was last set.
This attribute MUST be supported if the Printer supports both the
"printer-message-time" and the "printer-current-time" (dateTime)
attributes (see [RFC2911], section 4.4.30).
Note: This attribute helps users better understand the context for
the "printer-message-from-operator" message.
6.6 printer-xri-supported (1setOf collection)
This OPTIONAL Printer Description attribute is a multi-valued
attribute where each value has the 'collection' attribute syntax (see
[RFC3382]), containing member attributes with the same semantics as
the following IPP/1.1 READ-ONLY Printer Description attributes,
except for cardinality:
printer-uri-supported (1setOf uri)
- see [RFC2911], section 4.4.1
uri-authentication-supported (1setOf type2 keyword)
- see [RFC2911], section 4.4.2.
uri-security-supported (1setOf type2 keyword)
- see [RFC2911], section 4.4.3.
When setting the "printer-xri-supported" attribute with a Set-
Printer-Attributes request, the Printer MUST also set these three
IPP/1.1 READ-ONLY Printer Description attributes as a defined side
effect. Thus, this collection attribute provides the means to set
these three IPP/1.1 READ-ONLY attributes atomically so that they are
never left in a partially inconsistent state.
An IPP Printer MUST NOT provide any other way, using IPP, to set
these three IPP/1.1 READ-ONLY Printer Description attributes, since
they are READ-ONLY and MUST have consistent values at all times.
Note: The "printer-xri-supported" (1setOf collection) attribute can
be put into a directory schema that requires a single text string
value, such as could be used with SLPv2 [RFC2608], [RFC2609] or
LDAPv3 [RFC2251], [RFC2252], [RFC2926], by using suitable delimiting
characters to separate member attributes of the collection and/or
terminating collection values.
The member attributes of the "printer-xri-supported" (1setOf
collection) are given in Table 3.
Table 3 - Member attributes of "printer-xri-supported" (1setOf
collection)
Member attribute client Printer
MUST MUST
supply support
xri-uri (uri) yes yes
xri-authentication (type2 keyword) yes yes
xri-security (type2 keyword) yes yes
Other than the uniqueness and the cardinality requirements, the
semantics of these three member attributes is given in [RFC2911]
sections 4.4.1, 4.4.2, and 4.4.3, respectively.
A client can query the current values using the Get-Printer-
Attributes operation by supplying either:
1. the three IPP/1.1 attribute names: "printer-uri-supported", "uri-
authentication-supported", "uri-security-supported" and getting
back the parallel values OR
2. the single attribute name: "printer-xri-supported" and getting
back the 1setOf collection which contains the same information
semantically, but in a different form.
A client can query what member attribute values can be set by
supplying the three attribute names: "xri-uri-scheme-supported",
"xri-authentication-supported", and "xri-security-supported" in a
Get-Printer-Supported-Values request and getting back the uriScheme
and type2 keyword values that can be set. Since the "printer-xri-
supported", "uri-authentication-supported", and "uri-security-
supported" attributes are READ-ONLY, they are not queriable with the
Get-Printer-Supported-Values operation (see section 4.3). See Table
16.
For example:
"printer-xri-supported =
{ "xri-uri" = ipp://abc.com/p1
"xri-authentication" = basic
"xri-security" = tls
},
{ "xri-uri" = ipp://abc.com/p2
"xri-authentication" = digest
"xri-security" = tls
},
{ "xri-uri" = ipp://abc.com/p3
"xri-authentication" = none
"xri-security" = none
}
would cause the Printer to set the three corresponding IPP/1.1 READ-
ONLY attributes, each with three parallel values as follows:
"printer-uri-supported" = { ipp://abc.com/p1, ipp://abc.com/p2,
ipp://abc.com/p3 }
"uri-authentication-supported" = { basic, digest, none }
"uri-security-supported" = { tls, tls, none }
6.7 xri-uri-scheme-supported (1setOf uriScheme)
This OPTIONAL READ-ONLY Printer Description attribute identifies the
URI schemes that the implementation supports for use in the
"printer-uri-supported" (1setOf uri) Printer Description attribute
(see [RFC2911] section 4.4.1) and the "xri-uri" member attribute of
the "printer-xri-supported" (1setOf collection) Printer Description
attribute (see section 6.6).
A Printer MUST support this attribute if it supports the setting of
the "printer-xri-supported" (1setOf collection) with the Set-
Printer-Attributes operation.
6.8 xri-authentication-supported (1setOf type2 keyword)
This OPTIONAL READ-ONLY Printer Description attribute identifies the
Client Authentication mechanisms that the implementation supports for
use in the "uri-authentication-supported" (1setOf type2 keyword)
Printer Description attribute (see [RFC2911], section 4.4.2) and the
"xri-authentication" member attribute of the "printer-xri-supported"
(1setOf collection) Printer Description attribute (see section 6.6).
A Printer MUST support this attribute if it supports setting the
"printer-xri-supported" (1setOf collection) with the Set-Printer-
Attributes operation.
6.9 xri-security-supported (1setOf type2 keyword)
This OPTIONAL READ-ONLY Printer Description attribute identifies the
URI schemes that the implementation supports for use in the "uri-
security-supported" (1setOf type2 keyword) Printer Description
attribute (see [RFC2911], section 4.4.3) and the "xri-security"
member attribute of the "printer-xri-supported" (1setOf collection)
Printer Description attribute (see section 6.6).
A Printer MUST support this attribute if it supports setting the
"printer-xri-supported" (1setOf collection) with the Set-Printer-
Attributes operation.
7 Additional status codes
This section defines new status codes used by the operations defined
in this document.
7.1 client-error-attributes-not-settable (0x0413)
The Set-Printer-Attributes or Set-Job-Attributes operation failed
because one or more of the specified attributes cannot be set, either
because the attribute is defined to be READ-ONLY or the attribute is
not settable in this implementation (see sections 4.1.3 and 4.2.3).
The Printer MUST return this error code and the attribute keyword
name(s) and the 'not-settable' out-of-band value (see section 8.1) in
the Unsupported Attributes Group (see [RFC2911], section 3.1.7) for
all of the attributes that could not be set. When the Printer
returns this status, it MUST NOT change any of the attributes
supplied in the operation.
8 Additional out-of-band values
This section defines additional out-of-band values. As with all
out-of-band values, a client or a Printer MUST NOT use an out-of-band
value unless the definition of the attribute in an operation request
and/or response explicitly allows such usage. See the beginning of
[RFC2911], section 4.1.
8.1 'not-settable' out-of-band value
The 'not-settable' out-of-band attribute value is returned by the IPP
Printer in the Unsupported Attributes group of a response to indicate
that the attribute supplied by the client in the request is READ-ONLY
by definition or is not settable in this implementation.
The 'not-settable' out-of-band attribute value is defined for use
with the Set-Job-Attributes and Set-Printer-Attributes responses
only. If a future additional "set" operation allows the 'not-
settable' out-of-band value, its definition document MUST indicate
such use explicitly, including with which attributes.
An IPP object MUST support the 'not-settable' out-of-band value in a
Set-Job-Attributes or Set-Printer-Attributes request if it supports
those operations. A client MUST NOT supply the 'not-settable' out-
of-band value in any request. An IPP object MUST NOT support the
'not-settable' out-of-band value in other operations, unless the
operations' definition document explicitly defines such usage. If a
Printer receives this out-of-band value in any operation request, the
Printer MUST either (1) reject the entire request and return the
'client-error-bad-request' status code or (2) ignore the attribute
and return it with the 'unsupported' out-of-band value.
See sections 4.1.3 and 4.2.3 in this document for an example
definition of the usage of the 'not-settable' out-of-band value in
the Set-Printer-Attributes and Set-Job-Attributes responses.
8.1.1 Encoding of the 'not-settable' out-of-band attribute value
The encoding of the 'not-settable' out-of-band value is 0x15 (see
[RFC2910]). The value-length MUST be 0 and the value empty.
8.2 'delete-attribute' out-of-band value
The 'delete-attribute' out-of-band attribute value is supplied by the
client in a request to indicate that the Printer is to remove the
supplied attribute and all of its values from the target object, if
present.
The 'delete-attribute' out-of-band attribute value is defined for use
with the Set-Job-Attributes request only. If a future additional
"set" operation allows the 'delete-attribute' out-of-band value, its
definition document MUST indicate such use explicitly, including with
which attributes.
An IPP Printer MUST support the 'delete-attribute' out-of-band value
if it supports the Set-Job-Attributes operation. A client MUST NOT
supply, and an IPP object MUST NOT support, the 'delete-attribute'
out-of-band value in other operations, unless the operations'
definition document explicitly defines such usage. For example, the
'delete-attribute' out-of-band value MUST NOT be used in the Set-
Printer-Attributes operation, where the absence of an attribute from
an IPP object indicates that the attribute is not supported. If a
Printer receives this out-of-band value in other operation requests,
the Printer MUST either (1) reject the entire request and return the
'client-error-bad-request' status code or (2) ignore the attribute
and return it with the 'unsupported' out-of-band value.
See section 4.2 in this document for the definition of the usage of
the 'delete-attribute' out-of-band value in the Set-Job-Attributes
request.
8.2.1 Encoding of the 'delete-attribute' out-of-band value
The encoding of the 'delete-attribute' out-of-band value is 0x16 (see
[RFC2910]). The value-length MUST be 0 and the value empty.
8.3 'admin-define' out-of-band attribute value
Section 4.3 defines the Get-Printer-Supported-Values response to
contain the values of an "xxx-supported" attribute that are supported
by the implementation before any additional values are defined by the
administrator. The 'admin-define' out-of-band attribute value is
returned as an additional value of an "xxx-supported" attribute in a
Get-Printer-Supported-Values response to indicate that the
implementation supports allowing an administrator to define
additional arbitrary 'name' values for that "xxx-supported"
attribute.
For example, if the "media-supported" (1setOf (type3 keyword | name))
attribute contains this value, then the Printer MUST permit an
administrator to add new media names to the Printer's "media-
supported" attribute. In order for an administrator to add new
values to a Printer's "xxx-supported" attribute, the client supplies
the existing and new values in a Set-Printer-Attributes request for
that attribute. The client MUST supply any such administratively
defined values in the Set-Printer-Attributes request, using the
'name' attribute syntax.
The 'admin-define' out-of-band attribute value is defined for use
with the Get-Printer-Supported-Values response only. A Printer MUST
NOT return the 'admin-define' out-of-band value in a Get-Printer-
Attributes response, since such a response indicates what an end-user
client can supply in a Job Creation operation. If a future
additional "get" operation allows the 'admin-define' out-of-band
value, its definition document MUST indicate such use explicitly,
including with which attributes.
An IPP Printer MUST support the 'admin-define' out-of-band value, if
it supports a client setting arbitrary 'name' values of an "xxx-
supported" Printer attribute using the Set-Printer-Attributes
operation. A client MUST NOT supply the 'admin-define' out-of-band
value in any request. An IPP object MUST NOT support the 'admin-
define' out-of-band value in other operations, unless the operations'
definition document explicitly defines such usage. If a Printer
receives this out-of-band value in any operation request, the Printer
MUST either (1) reject the entire request and return the 'client-
error-bad-request' status code or (2) ignore the attribute and return
it with the 'unsupported' out-of-band value.
This document defines that the 'admin-define' out-of-band value MUST
be used only with "xxx-supported" attributes that are defined to
include the 'name' attribute syntax. This out-of-band value is not
intended to be used with "xxx-supported" attributes of other
attribute syntaxes, such as 'uri', even though the administrator
defines arbitrary values for such attributes. If other documents
extend the use of the 'admin-define' out-of-band value to other
attribute syntaxes, such a document MUST define such use explicitly,
including with which attributes.
See section 4.3 in this document for an example definition of the
usage of the 'admin-define' out-of-band attribute value in any "xxx-
supported" attribute returned in a Get-Printer-Supported-Values
response that is defined to include the 'name' attribute syntax.
8.3.1 Encoding of the 'admin-define' out-of-band attribute value
The encoding of the 'admin-define' out-of-band attribute value is
0x17 (see [RFC2910]). The value-length MUST be 0 and the value
empty.
9 New Values for Existing Printer Description Attributes
This section contains those attributes for which additional values
are added.
9.1 operations-supported (1setOf type2 enum)
The following "operation-id" values are added in order to support the
new operations defined in this document:
Table 4 - Operation-id assignments
Value Operation Name
0x0013 Set-Printer-Attributes
0x0014 Set-Job-Attributes
0x0015 Get-Printer-Supported-Values
10 Conformance Requirements
This section specifies the conformance requirements for clients and
IPP objects.
Both the Set-Job-Attributes and the Set-Printer-Attributes operations
defined in the document are OPTIONAL for an IPP object to support.
Either one MAY be supported without the other or both MAY be
supported. However, if the Set-Printer-Attributes operation is
supported, then the Get-Printer-Supported-Values operation MUST be
supported if any "xxx-supported" attributes are settable. Otherwise,
the Get-Printer-Supported-Values operation is OPTIONAL for an IPP
Printer to support.
If the Set-Printer-Attributes operation is supported, then the
Printer MUST support the following additional items:
1. the Get-Printer-Supported-Values operation (see section 5), if
any "xxx-supported" attributes are settable.
2. the "printer-settable-attributes-supported" Printer Description
attribute (see section 6.1).
3. the 'not-settable' out-of-band value in responses (see section
8.1).
4. the 'client-error-not-settable' status code (see section 7.1).
5. if the "printer-message-from-operator" Printer Description
attribute is supported (see [RFC2911], section 4.4.25), then it
MUST be settable.
6. the Get-Printer-Supported-Values operation (see section 4.3),
if any "xxx-supported" attributes are settable.
7. If a client can set a value with the 'name' attribute syntax
for one or more "xxx-supported" attributes, then the 'admin-
define' out-of-band attribute value (see section 8.3) MUST be
supported in the Get-Printer-Supported-Values response for each
such settable attribute (see section 4.3)
If the Set-Job-Attributes operation is supported, then the Printer
MUST support the following additional items:
1. the "job-settable-attributes-supported" Printer Description
attribute (see section 6.2).
2. the 'not-settable' out-of-band value in responses (see section
8.1).
3. the 'delete-attribute' out-of-band value in requests (see
section 8.2).
4. the 'client-error-not-settable' status code (see section 7.1).
5. if the "job-message-from-operator" Printer Description
attribute is supported (see [RFC2911], 4.3.16), then it MUST be
settable.
It is OPTIONAL for the Printer object to support the "printer-
message-time" (integer) and "printer-message-date-time" (dateTime)
Printer Description attributes. If both the "printer-message-time"
(integer) and the "printer-current-time" (dateTime) (see [RFC2911],
section 4.4.30) attributes are supported, then the "printer-message-
date-time" (dateTime) Printer Description attribute MUST be
supported.
As with all out-of-band values, a client or a Printer MUST NOT use an
out-of-band value, unless the definition document for the attribute
in an operation request and/or response explicitly allows such usage.
11 IANA Considerations
This section contains registration information for IANA to add to the
various IPP Registries according to the procedures defined in RFC
2911 [RFC2911], section 6. The resulting registrations will be
published in the http://www.iana.org/assignments/ipp-registrations
registry.
11.1 Operation Registrations
The following table lists all of the operations defined in this
document. These are to be registered according to the procedures
defined in RFC 2911 [RFC2911], section 6.4.
Operations: Ref. Section:
Set-Printer-Attributes RFC 3380 4.1
Set-Job-Attributes RFC 3380 4.2
Get-Printer-Supported-Values RFC 3380 4.3
11.2 Additional Enum Attribute Value Registrations for the
"operations-supported" Printer Attribute
The following table lists all the new enum attribute values defined
in this document as additional type2 enum values for use with the
"operations-supported" Printer Description attribute. These are to
be registered according to the procedures defined in RFC 2911 [RFC
2911], section 6.1.
Enum Attribute Values: Value Ref. Section:
Set-Printer-Attributes 0x0013 RFC 3380 4
Set-Job-Attributes 0x0014 RFC 3380 4
Get-Printer-Supported-Values 0x0015 RFC 3380 4
11.3 Keyword attribute value registrations
The following table lists all of the attributes defined in this
standard which have keywords values defined:
printer-settable-attributes-supported (1setOf type2 keyword)
RFC 3380 6.1
none RFC 3380 6.1
<Any other Printer attribute keyword name>
job-settable-attributes-supported (1setOf type2 keyword)
RFC 3380 6.2
none RFC 3380 6.2
<Any other Job attribute keyword name>
document-format-varying-attributes (1setOf type2 keyword)
RFC 3380 6.3
none
<Any Printer attribute keyword name>
xri-security-supported (1setOf type2 keyword) RFC 3380 6.9
none RFC 2911 4.4.3
ssl3 RFC 2911 4.4.3
tls' RFC 2911 4.4.3
xri-authentication-supported (1setOf type2 keyword)
none RFC 2911 4.4.2
requesting-user-name RFC 2911 4.4.2
basic RFC 2911 4.4.2
digest RFC 2911 4.4.2
certificate RFC 2911 4.4.2
11.4 Attribute Registrations
The following table lists all of the attributes defined in this
document. These are to be registered according to the procedures in
RFC 2911 [RFC2911], section 6.2.
Operation attributes: Ref. Section:
printer-message-from-operator (text(127)) RFC 3380 5.1
job-message-from-operator (text(127)) RFC 3380 5.2
Printer Description attributes: Ref. Section:
printer-settable-attributes-supported (1setOf type2 keyword)
RFC 3380 6.1
job-settable-attributes-supported (1setOf type2 keyword)
RFC 3380 6.2
document-format-varying-attributes (1setOf type2 keyword)
RFC 3380 6.3
printer-message-time (integer(MIN:MAX)) RFC 3380 6.4
printer-message-date-time (dateTime) RFC 3380 6.5
printer-xri-supported (1setOf collection) RFC 3380 6.6
xri-uri (uri) RFC 3380 6.6
xri-authentication (type2 keyword) RFC 3380 6.6
xri-security (type2 keyword) RFC 3380 6.6
xri-uri-scheme-supported (1setOf uriScheme) RFC 3380 6.7
xri-authentication-supported (1setOf type2 keyword) 6.8
xri-security-supported (1setOf type2 keyword) RFC 3380 6.9
11.5 Status code Registrations
The following table lists the status code defined in this document.
This is to be registered according to the procedures in RFC 2911
[RFC2911], section 6.6.
Status codes: Ref. Section:
client-error-attributes-not-settable (0x0413) RFC 3380 7.1
11.6 Out-of-band Attribute Value Registrations
The following table lists all of the out-of-band attribute values
defined in this document. These are to be registered according to
the procedures in RFC 2911 [RFC2911] section 6.7.
Value: Out-of-band Attribute value name: Ref. Section:
0x15 not-settable RFC 3380 8.1
0x16 delete-attribute RFC 3380 8.2
0x17 admin-define RFC 3380 8.3
12 Internationalization Considerations
This document has the same localization considerations as [RFC2911].
13 Security Considerations
The IPP Model and Semantics document ([RFC2911], section 8) discusses
high level security requirements (Client Authentication, Server
Authentication and Operation Privacy). Client Authentication is the
mechanism by which the client proves its identity to the server in a
secure manner. Server Authentication is the mechanism by which the
server proves its identity to the client in a secure manner.
Operation Privacy is defined as a mechanism for protecting operations
from eavesdropping.
In addition, the introduction of the Set-Printer-Attributes and Set-
Job-Attributes operations creates another security threat, since the
client is able to modify the Printer and Job attributes stored in the
Printer. Such modifications could lead to denial of service.
A malicious user could alter the policy established by the system
administrator and stored in the Printer attributes. Such alteration
could either grant access to more resources or deny access to
resources that the system administrator has established. For
example, the malicious user could remove all of the document-format
values from the "document-format-supported" Printer attribute so that
the Printer would refuse to accept all jobs.
The general remedy for such malicious user actions against Printer
attributes is to have strong Client Authentication coupled with
Printer access control, to limit the users who have System
Administrator or Operator privileges.
A malicious user could modify the Job Template attributes of another
user's Job, such as the "copies" attribute. For example, setting the
number of copies to a large number.
The general remedy for such malicious user actions against another
user's job is to have strong Client Authentication coupled with
Printer access control to limit the users who have System
Administrator or Operator privileges who can modify any job and, in
addition, store the Client Authentication with each Job so that only
the job owner End User can modify his/her own job.
14 References
14.1 Normative References
[RFC2565] Herriot, R., Butler, S., Moore, P. and R. Tuner, "Internet
Printing Protocol/1.0: Encoding and Transport", RFC 2565,
April 1999.
[RFC2566] deBry, R., Hastings, T., Herriot, R., Isaacson, S. and P.
Powell, "Internet Printing Protocol/1.0: Model and
Semantics", RFC 2566, April 1999.
[RFC2910] Herriot, R., Butler, S., Moore, P. and R. Turner,
"Internet Printing Protocol/1.1: Encoding and Transport",
RFC 2910, September 2000.
[RFC2911] Hastings, T., Herriot, R., deBry, R., Isaacson, S. and P.
Powell, "Internet Printing Protocol/1.0: Model and
Semantics", RFC 2911, September 2000.
[RFC3382] deBry, R., Hastings, T., Herriot, R., Ocke, K. and P.
Zehler, "Internet Printing Protocol (IPP): The
'collection' attribute syntax", RFC 3382, September 2002.
14.2 Informative References
[RFC2251] Wahl, M., Howes, T. abd S. Kille, "Lightweight Directory
Access Protocol (v3)", RFC 2251, December 1997.
[RFC2252] Wahl, M., Coulbeck, A., Howes, T. and S. Kille,
"Lightweight Directory Access Protocol (v3): Attribute
Syntax Definitions", RFC 2252, December 1997.
[RFC2608] Guttman, E., Perkins, C., Veizades, J. and M. Day,
"Service Location Protocol, Version 2", RFC 2608, June
1999.
[RFC2609] Guttman, E., Perkins, C. and J. Kempf, "Service Templates
and service: Schemes", RFC 2609, June 1999.
[RFC3196] Hastings, T., Manros, C., Zehler, P., Kugler, C. and H.
Holst, "Internet Printing Protocol/1.1: Implementor's
Guide", RFC 3196, November 2001.
Appendix A: Allowed Values for Set-Printer-Attributes and
Set-Job-Attributes requests (Normative)
This appendix is a normative part of this document and contains a
table of all IPP/1.1 attributes. Each row contains:
- an attribute and
- the values allowed in the Set-Printer-Attributes or Set-Job-
Attributes request for the attribute. The entry in each cell
is the name (first few words) of each item below 1, 2, 3, 4a-g,
and 5.
The allowed values include the following cases:
1. READ-ONLY: the Set-Printer-Attributes or Set-Job-Attributes
operation MUST NOT change this attribute and MUST reject the
entire operation (see section 7.1).
2. Any of "xxx-supported": the Set-Printer-Attributes or Set-
Job-Attributes operation accepts values that are allowed
according to the IPP/1.1 rules for validating the value(s) of
an "xxx" Printer or Job attribute against the value(s) of the
corresponding "xxx-supported" Printer attribute. Table 5
summarizes those validation rules depending on each attribute
syntax and value of an "xxx" attribute supplied in the request
and that of the corresponding "xxx-supported" Printer
attribute. The "xxx-supported" attribute syntax type and
value(s) are obtained from a Get-Printer-Supported-Values
response (see the tables in this Appendix).
Table 5 - Validation rules for 'Any of "xxx-supported" '
Type of "xxx" Type of "xxx- Validates if:
value to be supported" value
set
integer rangeOfInteger each value is in one of the
"xxx-supported" ranges
uri uriScheme each uri scheme matches one
of the "xxx-supported"
schemes
any boolean if the boolean "xxx-
supported" is 'true'
any same type each value matches an "xxx-
supported" value of the same
type
For additional non-normative explanatory information see section
3.1.2.3 of the "Internet Printing Protocol/1.1: Implementer's Guide"
[RFC3196].
3. From Get-Printer-Supported-Values: the Set-Printer-Attributes
operation accepts values that are allowed according to the
IPP/1.1 rules for validating the value(s) of an "xxx" Printer
attribute against the value(s) of the corresponding "xxx-
supported" Printer attribute. Table 6 summarizes those
validation rules depending on each attribute syntax and value
of an "xxx" attribute supplied in the request and that of the
corresponding "xxx-supported" Printer attribute. The "xxx-
supported" attribute syntax type and attribute value(s) are
obtained from a Get-Printer-Supported-Values response (see
Appendix B: Attributes returned from Get-Printer-Supported-
Values below).
Table 6 - Validation rules for 'From Get-Printer-Supported-Values'
Type of -
"xxx" supported" value Validates if:
value to
be set Type of "xxx
integer rangeOfInteger each 'integer' value is in one of
the "xxx-supported" ranges
uri uriScheme the uri scheme of each value
matches one of the "xxx-supported"
schemes
any boolean if the boolean "xxx-supported" is
'true'
name 'admin-define' any 'name' value matches
out-of-band
value
any same type each value matches an "xxx-
supported" value of the same type
For additional non-normative explanatory information see section
3.1.2.3 of the "Internet Printing Protocol/1.1: Implementer's Guide"
[RFC3196].
4. Any value of the proper attribute syntax: the Set-Printer-
Attributes or Set-Job-Attributes operation accepts any value of
the specified attribute syntax. The attribute syntaxes
supported are enumerated below.
a. Any text(127)
b. Any name(127)
c. Any uri
d. Any boolean
e. Any positive integer
f. Any dateTime
g. 1setOf any uri
5. Combination of 'Any of "xxx-supported"' or 'Any name'. If a
Printer implementation doesn't want to allow setting values
indicated in this Appendix as "any xxx", it can make the value
be not-settable.
Table 7 - Values allowed for Job Template Attributes in the
Set-Job-Attributes Operation
Job Template Attributes Values allowed for
Set
job-priority (integer(1:100)) Any of "xxx-
supported"
job-hold-until (type3 keyword | name (MAX)) Any of "xxx-
supported"
job-sheets (type3 keyword | name(MAX)) Any of "xxx-
supported"
multiple-document-handling (type2 keyword) Any of "xxx-
supported"
copies (integer(1:MAX)) Any of "xxx-
supported"
finishings (1setOf type2 enum) Any of "xxx-
supported"
page-ranges (1setOf rangeOfInteger (1:MAX)) Any of "xxx-
supported"
sides (type2 keyword) Any of "xxx-
supported"
number-up (integer(1:MAX)) Any of "xxx-
supported"
orientation-requested (type2 enum) Any of "xxx-
supported"
media (type3 keyword | name(MAX)) Any of "xxx-
supported"
printer-resolution (resolution) Any of "xxx-
supported"
print-quality (type2 enum) Any of "xxx-
supported"
Table 8 - Values allowed for Job Description Attributes in the
Set-Job-Attributes Operation
Job Description Attributes Values allowed for
Set
job-uri (uri) READ-ONLY
job-id (integer(1:MAX)) READ-ONLY
job-printer-uri (uri) READ-ONLY
job-more-info (uri) READ-ONLY
job-name (name(MAX)) Any name(MAX)
job-originating-user-name (name(MAX)) READ-ONLY
job-state (type1 enum) READ-ONLY
job-state-reasons (1setOf type2 keyword) READ-ONLY
job-state-message (text(MAX)) READ-ONLY
job-detailed-status-messages (1setOf READ-ONLY
text(MAX))
job-document-access-errors (1setOf READ-ONLY
text(MAX))
number-of-documents (integer(0:MAX)) READ-ONLY
output-device-assigned (name(127)) READ-ONLY
time-at-creation (integer(MIN:MAX)) READ-ONLY
time-at-processing (integer(MIN:MAX)) READ-ONLY
time-at-completed (integer(MIN:MAX)) READ-ONLY
job-printer-up-time (integer(1:MAX)) READ-ONLY
date-time-at-creation (dateTime) READ-ONLY
Job Description Attributes Values allowed for
Set
date-time-at-processing (dateTime) READ-ONLY
date-time-at-completed (dateTime) READ-ONLY
number-of-intervening-jobs (integer(0:MAX)) READ-ONLY
job-message-from-operator (text(127)) Any text(127)
job-k-octets (integer(0:MAX)) READ-ONLY
job-impressions (integer(0:MAX)) READ-ONLY
job-media-sheets (integer(0:MAX)) READ-ONLY
job-k-octets-processed (integer(0:MAX)) READ-ONLY
job-impressions-completed (integer(0:MAX)) READ-ONLY
job-media-sheets-completed (integer(0:MAX)) READ-ONLY
attributes-charset (charset) READ-ONLY
attributes-natural-language READ-ONLY
(naturalLanguage)
Table 9 - Values allowed for Printer Job Template Attributes in
the Set-Printer-Attributes Operation
Printer Job Template Attributes Values allowed
for Set
job-priority-default (integer(1:100)) Any of "xxx-
supported"
job-hold-until-default (type3 keyword | name Any of "xxx-
(MAX)) supported"
job-sheets-default (type3 keyword | name(MAX)) Any of "xxx-
supported"
multiple-document-handling-default (type2 Any of "xxx-
keyword) supported"
copies-default (integer(1:MAX)) Any of "xxx-
supported"
Printer Job Template Attributes Values allowed
for Set
finishings-default (1setOf type2 enum) Any of "xxx-
supported"
sides-default (type2 keyword) Any of "xxx-
supported"
number-up-default (integer(1:MAX)) Any of "xxx-
supported"
orientation-requested-default (type2 enum) Any of "xxx-
supported"
media-default (type3 keyword | name(MAX)) Any of "xxx-
supported"
printer-resolution-default (resolution) Any of "xxx-
supported"
print-quality-default (type2 enum) Any of "xxx-
supported"
job-priority-supported (integer(1:100)) From Get-
Printer-
Supported-Values
job-hold-until-supported (1setOf(type3 keyword From Get-
| name (MAX))) Printer-
Supported-Values
job-sheets-supported (1setOf(type3 keyword | From Get-
name(MAX))) Printer-
Supported-Values
multiple-document-handling-supported (1setOf From Get-
type2 keyword) Printer-
Supported-Values
copies-supported (rangeOfInteger(1:MAX)) From Get-
Printer-
Supported-Values
finishings-supported (1setOf type2 enum) From Get-
Printer-
Supported-Values
Printer Job Template Attributes Values allowed
for Set
page-ranges-supported (boolean) From Get-
Printer-
Supported-Values
sides-supported (1setOf type2 keyword) From Get-
Printer-
Supported-Values
number-up-supported (1setOf (integer(1:MAX) | From Get-
rangeOfInteger(1:MAX))) Printer-
Supported-Values
orientation-requested-supported (1setOf type2 From Get-
enum) Printer-
Supported-Values
media-supported (1setOf (type3 keyword | From Get-
name(MAX))) Printer-
Supported-Values
printer-resolution-supported (1setOf From Get-
resolution) Printer-
Supported-Values
print-quality-supported (1setOf type2 enum) From Get-
Printer-
Supported-Values
media-ready (type3 keyword | name(MAX)) From Get-
Printer-
Supported-Values
Table 10 - Values allowed for Printer Description Attributes in
the Set-Printer-Attributes Operation
Printer Description Attributes Values allowed for
Set
printer-uri-supported (1setOf uri) READ-ONLY
uri-authentication-supported (1setOf type2 READ-ONLY
keyword)
uri-security-supported (1setOf type2 READ-ONLY
keyword)
printer-xri-supported (1setOf collection)
member attributes:
xri-uri (uri) any uriScheme of
"xri-uri-scheme-
supported" from
Get-Printer-
Attributes
xri-authentication (type2 keyword) any keyword of
"xri-
authentication-
supported" from
Get-Printer-
Attributes
xri-security (type2 keyword) any keyword of
"xri-security-
supported" from
Get-Printer-
Attributes
xri-uri-scheme-supported (1setOf uriScheme) READ-ONLY
xri-authentication-supported (1setOf type2 READ-ONLY
keyword)
xri-security-supported (1setOf type2 READ-ONLY
keyword)
Printer Description Attributes Values allowed for
Set
printer-name (name(127)) Any name(127)
printer-location (text(127)) Any text(127)
printer-info (text(127)) Any text(127)
printer-more-info (uri) Any uri
printer-driver-installer (uri) Any uri
printer-make-and-model (text(127)) Any text(127)
printer-more-info-manufacturer (uri) Any uri
printer-state (type1 enum) READ-ONLY
printer-state-reasons (1setOf type2 READ-ONLY
keyword)
printer-state-message (text(MAX)) READ-ONLY
ipp-versions-supported (1setOf type2 From Get-Printer-
keyword) Supported-Values
operations-supported (1setOf type2 enum) From Get-Printer-
Supported-Values
multiple-document-jobs-supported (boolean) From Get-Printer-
Supported-Values
charset-configured (charset) Any of "xxx-
supported", use
"charset-supported"
charset-supported (1setOf charset) From Get-Printer-
Supported-Values
Printer Description Attributes Values allowed for
Set
natural-language-configured Any of "xxx-
(naturalLanguage) supported", use
"generated-natural-
language-supported"
generated-natural-language-supported From Get-Printer-
(1setOf naturalLanguage) Supported-Values
document-format-default (mimeMediaType) Any of "xxx-
supported"
document-format-supported (1setOf From Get-Printer-
mimeMediaType) Supported-Values
printer-is-accepting-jobs (boolean) READ-ONLY
queued-job-count (integer(0:MAX)) READ-ONLY
printer-message-from-operator (text(127)) Any text(127)
color-supported (boolean) From Get-Printer-
Supported-Values
reference-uri-schemes-supported (1setOf From Get-Printer-
uriScheme) Supported-Values
pdl-override-supported (type2 keyword) From Get-Printer-
Supported-Values
printer-up-time (integer(1:MAX)) READ-ONLY
printer-current-time (dateTime) Any dateTime **
multiple-operation-time-out any positive
(integer(1:MAX)) integer
compression-supported (1setOf type3 From Get-Printer-
keyword) Supported-Values
job-k-octets-supported From Get-Printer-
(rangeOfInteger(0:MAX)) Supported-Values
Printer Description Attributes Values allowed for
Set
job-impressions-supported From-Get-Printer-
(rangeOfInteger(0:MAX)) Supported-Values
job-media-sheets-supported From Get-Printer-
(rangeOfInteger(0:MAX)) Supported-Values
pages-per-minute (integer(0:MAX)) READ-ONLY
pages-per-minute-color (integer(0:MAX)) READ-ONLY
printer-settable-attributes-supported From Get-Printer-
(1setOf type2 keyword) Supported-Values
job-settable-attributes-supported (1setOf From Get-Printer-
type2 keyword) Supported-Values
document-format-varying-attributes (1setOf READ-ONLY
type2 keyword)
printer-message-time (integer(MIN:MAX)) READ-ONLY
printer-message-date-time(dateTime) READ-ONLY
** - The "printer-current-time" (dateTime) attribute is settable in
order to allow an administrator to correct an incorrect dateTime or
time zone.
Appendix B: Attributes returned from Get-Printer-Supported-Values
(Normative)
This Appendix is a normative part of this document and lists all the
attributes that are possible for an implementation to return in a
Get-Printer-Supported-Values response, i.e., all the "xxx-supported"
attributes that can be supplied in a Set-Printer-Attributes request.
READ-ONLY attributes MUST NOT be returned in a Get-Printer-
Supported-Values response and are indicated in the tables as "READ-
ONLY - MUST NOT be returned."
For the following attributes, the value allowed by the Set-Printer-
Attributes operation MUST be a single integer value in the range
specified by the value returned by the Get-Printer-Supported-Values
operation.
Table 11 - Printer Job Template Attributes returned from
Get-Printer-Supported-Values
Printer Job Template Attributes Values Returned
job-priority-supported (integer(1:100)) rangeOfInteger(1:100)
For the following attributes, the value allowed by the Set-Printer-
Attributes operation MUST be a single rangeOfInteger value whose
bounds do not exceed those of the range specified by the value
returned by the Get-Printer-Supported-Values operation.
Table 12 - Printer Job Template Attributes returned from
Get-Printer-Supported-Values
Printer Job Template Attributes Values Returned
copies-supported (rangeOfInteger(1:MAX)) rangeOfInteger(1:MAX)
The following table has the same criteria as the last, but is for
Printer Description attributes.
Table 13 - Printer Description Attributes returned from
Get-Printer-Supported-Values
Printer Description Attributes Values allowed for Set
job-k-octets-supported rangeOfInteger(0:MAX)
(rangeOfInteger(0:MAX))
job-impressions-supported
(rangeOfInteger(0:MAX)) rangeOfInteger(0:MAX)
job-media-sheets-supported rangeOfInteger(0:MAX)
(rangeOfInteger(0:MAX))
For the following attributes, the value allowed by the Set-Printer-
Attributes operation MUST be one or more integers and rangeOfInteger
values, such that the integer values described by these integers and
rangeOfInteger is the same as or a subset of the integers described
by the integers and rangeOf Integer of values returned by the Get-
Printer-Supported-Values operation.
Table 14 - Printer Job Template Attributes returned from
Get-Printer-Supported-Values
Printer Job Template Attributes Values Returned
number-up-supported (1setOf (integer(1:MAX) 1setOf
| rangeOfInteger(1:MAX))) (integer(1:MAX) |
rangeOfInteger(1:MA
X))
For the following attributes, the value allowed by the Set-Printer-
Attributes operation MUST be one or more values, where each such
value matches a value returned by the Get-Printer-Supported-Values
operation. A keyword, enum, boolean, charset, naturalLanguage,
uriScheme, mimeMediaType or resolution value matches if it is equal.
For Job Template attributes, with the attribute syntax 'type3 keyword
| name', any 'name' attribute syntax value matches the 'admin-define'
out-of-band value, if the implementation allows the administrator to
set any name values for the attribute.
Table 15 - Printer Job Template Attributes returned from
Get-Printer-Supported-Values
Printer Job Template Attributes Values Returned
job-hold-until-supported (1setOf(type3 1setOf (type3
keyword | name (MAX))) keyword | 'admin-
define')
job-sheets-supported (1setOf(type3 keyword 1setOf (type3
| name(MAX))) keyword | 'admin-
define')
multiple-document-handling-supported 1setOf type2
(1setOf type2 keyword) keyword
finishings-supported (1setOf type2 enum) 1setOf type2 enum
page-ranges-supported (boolean) 1setOf boolean **
sides-supported (1setOf type2 keyword) 1setOf type2
keyword
orientation-requested-supported (1setOf 1setOf type2 enum
type2 enum)
Printer Job Template Attributes Values Returned
media-supported (1setOf (type3 keyword | 1setOf (type3
name(MAX))) keyword | 'admin-
define')
printer-resolution-supported (1setOf 1setOf resolution
resolution)
print-quality-supported (1setOf type2 enum) 1setOf type2 enum
** Note: the Get-Printer-Supported-Values returns a '1setOf boolean'
so that all possible values are indicated, while ** Get-Printer-
Attributes returns only a single 'boolean' value.
The following table has the same criteria as the last, but is for
Printer Description attributes.
Table 16 - Printer Description Attributes returned from
Get-Printer-Supported-Values
Printer Description Attributes Values allowed for
Set
printer-uri-supported (1setOf uri) READ-ONLY - MUST
NOT be returned
uri-authentication-supported (1setOf type2 READ-ONLY - MUST
keyword) NOT be returned
uri-security-supported (1setOf type2 READ-ONLY - MUST
keyword) NOT be returned
printer-xri-supported (1setOf collection) MUST NOT be
returned; see next
three attributes
returned with Get-
Printer-Attributes:
xri-uri-scheme-supported (1setOf uriScheme) READ-ONLY - MUST
NOT be returned
xri-authentication-supported (1setOf type2 READ-ONLY - MUST
keyword) NOT be returned
xri-security-supported (1setOf type2 READ-ONLY - MUST
keyword) NOT be returned
Printer Description Attributes Values allowed for
Set
ipp-versions-supported (1setOf type2 1setOf type2
keyword) keyword
operations-supported (1setOf type2 enum) 1setOf type2
keyword
multiple-document-jobs-supported (boolean) 1setOf boolean **
charset-supported (1setOf charset) 1setOf charset
generated-natural-language-supported 1setOf
(1setOf naturalLanguage) naturalLanguage
document-format-supported (1setOf 1setOf
mimeMediaType) mimeMediaType
color-supported (boolean) 1setOf boolean **
reference-uri-schemes-supported (1setOf 1setOf uriScheme
uriScheme)
pdl-override-supported (type2 keyword) 1setOf type2
keyword **
compression-supported (1setOf type3 1setOf type3
keyword) keyword
printer-settable-attributes-supported 1setOf type2
(1setOf type2 keyword) keyword
job-settable-attributes-supported (1setOf 1setOf type2
type2 keyword) keyword
** Note: the Get-Printer-Supported-Values returns a '1setOf X' so
that all possible values are indicated, while Get-Printer-Attributes
returns only a single 'X' value.
Appendix C: Description of the Base IPP Documents (Informative)
The base set of IPP documents includes:
Design Goals for an Internet Printing Protocol [RFC2567]
Rationale for the Structure and Model and Protocol for the
Internet Printing Protocol [RFC2568]
Internet Printing Protocol/1.1: Model and Semantics [RFC2911]
Internet Printing Protocol/1.1: Encoding and Transport [RFC2910]
Internet Printing Protocol/1.1: Implementer's Guide [RFC3196]
Mapping between LPD and IPP Protocols [RFC2569]
The "Design Goals for an Internet Printing Protocol" document takes a
broad look at distributed printing functionality, and it enumerates
real-life scenarios that help to clarify the features that need to be
included in a printing protocol for the Internet. It identifies
requirements for three types of users: end users, operators, and
administrators. It calls out a subset of end user requirements that
are satisfied in IPP/1.0 [RFC2566, RFC2565]. A few OPTIONAL operator
operations have been added to IPP/1.1 [RFC2911, RFC2910].
The "Rationale for the Structure and Model and Protocol for the
Internet Printing Protocol" document describes IPP from a high level
view, defines a roadmap for the various documents that form the suite
of IPP specification documents, and gives background and rationale
for the IETF IPP working group's major decisions.
The "Internet Printing Protocol/1.1: Model and Semantics" document
describes a simplified model with abstract objects, their attributes,
and their operations. The model introduces a Printer and a Job. The
Job supports multiple documents per Job. The model document also
addresses how security, internationalization, and directory issues
are addressed.
The "Internet Printing Protocol/1.1: Encoding and Transport" document
is a formal mapping of the abstract operations and attributes defined
in the model document onto HTTP/1.1 [RFC2616]. It also defines the
encoding rules for a new Internet MIME media type called
"application/ipp". This document also defines the rules for
transporting over HTTP, a message body whose Content-Type is
"application/ipp". This document defines the 'ipp' scheme for
identifying IPP printers and jobs.
The "Internet Printing Protocol/1.1: Implementer's Guide" document
gives insight and advice to implementers of IPP clients and IPP
objects. It is intended to help them understand IPP/1.1 and some of
the considerations that may assist them in the design of their client
and/or IPP object implementations. For example, a typical order of
processing requests is given, including error checking. Motivation
for some of the specification decisions are also included.
The "Mapping between LPD and IPP Protocols" document gives some
advice to implementers of gateways between IPP and LPD (Line Printer
Daemon) implementations.
Authors' Addresses
Carl Kugler
IBM
P.O. Box 1900
Boulder, CO 80301-9191
Phone: (303) 924-5060
EMail: kugler@us.ibm.com
Tom Hastings
Xerox Corporation
737 Hawaii St. ESAE 231
El Segundo, CA 90245
Phone: 310-333-6413
Fax: 310-333-5514
EMail: hastings@cp10.es.xerox.com
Robert Herriot
Consultant
706 Colorado Ave
Palo Alto, CA 94303
Phone: 650-327-4466
Fax: 650-327-4466
EMail: bob@Herriot.com
Harry Lewis
IBM
6300 Diagonal Hwy.
Boulder, CO 80301-9191
Phone: (303) 924-5337
EMail: harryl@us.ibm.com
IPP Web Page: http://www.pwg.org/ipp/
IPP Mailing List: ipp@pwg.org
To subscribe to the ipp mailing list, send the following email:
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3) put the following two lines in the message body:
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end
Implementers of this specification document are encouraged to join
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clarification issues and review of registration proposals for
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