doc/ipp.shtml - platform/external/libcups - Git at Google

 <HTML>
 <HEAD>
 	<META NAME="COPYRIGHT" CONTENT="Copyright 1997-2003 All Rights Reserved">
 	<META NAME="DOCNUMBER" CONTENT="CUPS-IPP-1.2">
 	<META NAME="Author" CONTENT="Easy Software Products">
 	<TITLE>CUPS Implementation of IPP</TITLE>
 </HEAD>
 <BODY>

 <H1>Scope</H1>

 <H2>Identification</H2>

 <P>This document provides an overview of the Internet Printing Protocol
 ("IPP") version 1.1 as implemented in the Common UNIX Printing System
 ("CUPS") version 1.2.

 <EMBED SRC="system-overview.shtml">

 <H2>Document Overview</H2>

 <P>This document is organized into the following sections:

 <UL>
 	<LI><A HREF="#1">1 - Scope</A>
 	<LI><A HREF="#2">2 - References</A>
 	<LI><A HREF="#3">3 - Overview</A>
 	<LI><A HREF="#4">4 - Operations</A>
 	<LI><A HREF="#5">5 - Attributes</A>
 	<LI><A HREF="#6">A - Glossary</A>
 </UL>

 <EMBED SRC="references.shtml">

 <H1>Overview</H1>

 <P>CUPS 1.1 implements IPP/1.1 and the operations and attributes
 defined in the "IPP: Job and Printer Set Operations",
 "IPP/1.1: Output-bin Attribute Extension", and "IPP/1.1: finishings
 'fold',' trim', and 'bale' attribute values extension" specifications.

 <P>CUPS also provides 13 new operations and many new attributes to
 support multiple IPP printers and printer classes on a single host.

 <H2>IPP URIs</H2>

 <P>CUPS supports both the "http" and "ipp" methods. The following
 resource names are used:

 <DL>

 	<DT>method://hostname:port/

 	<DD>Can be used for all "get" operations.

 	<DT>method://hostname:port/admin

 	<DD>Used for all administrative operations.

 	<DT>method://hostname:port/classes/name

 	<DD>Specifies a printer class.

 	<DT>method://hostname:port/jobs/id

 	<DD>Specifies a job.

 	<DT>method://hostname:port/printers/name

 	<DD>Specifies a printer.

 </DL>

 <P>So a typical printer URI would be "ipp://foo.bar.com/printers/LaserJet".

 <P>In addition, the CUPS server also supports normal browser access to
 "method://hostname:port/admin/", "method://hostname:port/classes/",
 "method://hostname:port/jobs/", and "method://hostname:port/printers/"
 to view and manage resources on the server dynamically.

 <H2>CUPS IPP Operations</H2>

 <P>CUPS provides 13 extension operations in addition to most of the
 standard IPP and registered extension operations:

 <CENTER><TABLE BORDER WIDTH="80%">
 <TR>
 	<TH VALIGN="TOP">Operation Name</TH>
 	<TH VALIGN="TOP">CUPS</TH>
 	<TH VALIGN="TOP">Code</TH>
 	<TH VALIGN="TOP">Brief Description</TH>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Print-Job</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0002</TD>
 	<TD VALIGN="TOP">Print a file.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Validate-Job</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0004</TD>
 	<TD VALIGN="TOP">Validate job attributes.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Create-Job</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x0005</TD>
 	<TD VALIGN="TOP">Create a print job.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Send-Document</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x0006</TD>
 	<TD VALIGN="TOP">Send a file for a print job.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Cancel-Job</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0008</TD>
 	<TD VALIGN="TOP">Cancel a print job.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Get-Job-Attributes</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0009</TD>
 	<TD VALIGN="TOP">Get job attributes.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Get-Jobs</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x000A</TD>
 	<TD VALIGN="TOP">Get all jobs.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Get-Printer-Attributes</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x000B</TD>
 	<TD VALIGN="TOP">Get printer attributes.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Hold-Job</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x000C</TD>
 	<TD VALIGN="TOP">Hold a job for printing.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Release-Job</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x000D</TD>
 	<TD VALIGN="TOP">Release a job for printing.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Pause-Printer</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0010</TD>
 	<TD VALIGN="TOP">Pause printing on a printer.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Resume-Printer</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0011</TD>
 	<TD VALIGN="TOP">Resume printing on a printer.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Purge-Jobs</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x0012</TD>
 	<TD VALIGN="TOP">Purge all jobs.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">Set-Job-Attributes</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x0014</TD>
 	<TD VALIGN="TOP">Set attributes for a pending or held job.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Get-Default</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4001</TD>
 	<TD VALIGN="TOP">Get the default destination.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Get-Printers</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4002</TD>
 	<TD VALIGN="TOP">Get all of the available printers.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Add-Modify-Printer</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4003</TD>
 	<TD VALIGN="TOP">Add or modify a printer.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Delete-Printer</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4004</TD>
 	<TD VALIGN="TOP">Delete a printer.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Get-Classes</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4005</TD>
 	<TD VALIGN="TOP">Get all of the available printer classes.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Add-Modify-Class</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4006</TD>
 	<TD VALIGN="TOP">Add or modify a printer class.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Delete-Class</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4007</TD>
 	<TD VALIGN="TOP">Delete a printer class.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Accept-Jobs</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4008</TD>
 	<TD VALIGN="TOP">Accept jobs on a printer or printer class.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Reject-Jobs</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x4009</TD>
 	<TD VALIGN="TOP">Reject jobs on a printer or printer class.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Set-Default</TD>
 	<TD VALIGN="TOP">1.0</TD>
 	<TD VALIGN="TOP">0x400A</TD>
 	<TD VALIGN="TOP">Set the default destination.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Get-Devices</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x400B</TD>
 	<TD VALIGN="TOP">Get all of the available devices.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Get-PPDs</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x400C</TD>
 	<TD VALIGN="TOP">Get all of the available PPDs.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">CUPS-Move-Job</TD>
 	<TD VALIGN="TOP">1.2</TD>
 	<TD VALIGN="TOP">0x400D</TD>
 	<TD VALIGN="TOP">Move a job to a different printer.</TD>
 </TR>
 </TABLE>
 </CENTER>

 <H1>Operations</H1>

 <P>The following sections describe the operations supported by CUPS.
 In the interest of brevity, operations which use only the standard
 IPP attributes are not described.

 <H2>Print-Job Operation</H2>

 <P>The Print-Job operation (0x0002) prints a file.

 <H3>Print-Job Request</H3>

 <P>The following groups of attributes are supplied as part of the
 Print-Job request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer.

 </UL>

 <P>Group 2: Job Template Attributes

 <UL>

 	<P>"job-billing" (text(MAX)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a billing string that is logged
 	with the page accounting information.

 	<P>"job-sheets" (1setof type3 keyword | name(MAX)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies one or two banner pages that
 	are printed before and after any files in the print job. The
 	name of "none" is reserved to indicate that no banner page
 	should be printed. If the client does not specify this
 	attribute then the value of the "job-sheets-default" printer
 	object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	job-sheets attribute value.

 	<P>"media" (1setof type3 keyword | name(MAX)):

 	<P>The client OPTIONALLY supplies one or more media attributes
 	specifying the size, type, source, and color of the output
 	media. If the client does not specify this attribute then the
 	value of the "media-default" printer object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	media attribute value.

 	<P>Other Job Template Attributes

 </UL>

 <P>The Print-Job request is followed by a file to be printed.

 <H3>Print-Job Response</H3>

 <P>The following groups of attributes are send as part of the Print-Job
 Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Job Attributes

 <UL>

 	<P>Standard Job Attributes

 </UL>

 <H2>Create-Job Operation</H2>

 <P>The Create-Job operation (0x0005) creates a new, empty print job.

 <H3>Create-Job Request</H3>

 <P>The following groups of attributes are supplied as part of the
 Create-Job request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer.

 </UL>

 <P>Group 2: Job Template Attributes

 <UL>

 	<P>"job-billing" (text(MAX)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a billing string that is logged
 	with the page accounting information.

 	<P>"job-sheets" (1setof type3 keyword | name(MAX)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies one or two banner pages that
 	are printed before and after any files in the print job. The
 	name of "none" is reserved to indicate that no banner page
 	should be printed. If the client does not specify this
 	attribute then the value of the "job-sheets-default" printer
 	object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	job-sheets attribute value.

 	<P>"media" (1setof type3 keyword | name(MAX)):

 	<P>The client OPTIONALLY supplies one or more media attributes
 	specifying the size, type, source, and color of the output
 	media. If the client does not specify this attribute then the
 	value of the "media-default" printer object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	media attribute value.

 	<P>Standard Job Template Attributes

 </UL>

 <H3>Create-Job Response</H3>

 <P>The following groups of attributes are send as part of the
 Create-Job Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Job Attributes

 <UL>

 	<P>Standard Job Attributes

 </UL>

 <H2>Set-Job-Attributes Operation</H2>

 <P>The Set-Job-Attributes operation (0x0014) changes the attributes of
 an active (not completed) job.

 <H3>Set-Job-Attributes Request</H3>

 <P>The following groups of attributes are supplied as part of the
 Set-Job-Attributes request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri) and "job-id" (integer)
 	<P><I>OR</I>
 	<P>"job-uri":

 	<P>The client MUST supply a URI for the specified printer and
 	a job ID number, or the job URI.

 </UL>

 <P>Group 2: Job Template Attributes

 <UL>

 	<P>"job-sheets" (1setof type3 keyword | name(MAX)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies one or two banner pages that
 	are printed before and after any files in the print job. The
 	name of "none" is reserved to indicate that no banner page
 	should be printed. If the client does not specify this
 	attribute then the value of the "job-sheets-default" printer
 	object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	job-sheets attribute value.

 	<P>"media" (1setof type3 keyword | name(MAX)):

 	<P>The client OPTIONALLY supplies one or more media attributes
 	specifying the size, type, source, and color of the output
 	media. If the client does not specify this attribute then the
 	value of the "media-default" printer object attribute is used.

 	<P><B>Note:</B> Standard IPP only allows specification of a single
 	media attribute value.

 	<P>Other Job Template Attributes

 </UL>

 <H3>Set-Job-Attributes Response</H3>

 <P>The following groups of attributes are send as part of the Set-Job-Attributes
 Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Get-Default Operation</H2>

 <P>The CUPS-Get-Default operation (0x4001) returns the default printer
 URI and attributes.

 <H3>CUPS-Get-Default Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Get-Default request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"requested-attributes" (1setOf keyword) :

 	<P>The client OPTIONALLY supplies a set of attribute names
 	and/or attribute group names in whose values the requester is
 	interested. If the client omits this attribute, the server
 	responds as if this attribute had been supplied with a value of
 	'all'.

 </UL>

 <H3>CUPS-Get-Default Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Get-Default Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Printer Object Attributes

 <UL>

 	<P>The set of requested attributes and their current values.

 </UL>

 <H2>CUPS-Get-Printers Operation</H2>

 <P>The CUPS-Get-Printers operation (0x4002) returns the printer
 attributes for every printer known to the system. This may include
 printers that are not served directly by the server.

 <H3>CUPS-Get-Printers Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Get-Printers request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"limit" (integer (1:MAX)):

 	<P>The client OPTIONALLY supplies this attribute limiting the
 	number of printers that are returned.

 	<P>"printer-info" (text(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies this attribute to
 	select which printers are returned.

 	<P>"printer-location" (text(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies this attribute to
 	select which printers are returned.

 	<P>"printer-type" (type2 enum):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a printer type enumeration to
 	select which printers are returned.

 	<P>"printer-type-mask" (type2 enum):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a printer type mask
 	enumeration to select which bits are used in the "printer-type"
 	attribute.

 	<P>"requested-attributes" (1setOf keyword) :

 	<P>The client OPTIONALLY supplies a set of attribute names
 	and/or attribute group names in whose values the requester is
 	interested. If the client omits this attribute, the server
 	responds as if this attribute had been supplied with a value of
 	'all'.

 </UL>

 <H3>CUPS-Get-Printers Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Get-Printers Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Printer Object Attributes

 <UL>

 	<P>The set of requested attributes and their current values for
 	each printer.

 </UL>

 <H2>CUPS-Add-Modify-Printer Operation</H2>

 <P>The CUPS-Add-Modify-Printer operation (0x4003) adds a new printer or
 modifies an existing printer on the system.

 <H3>CUPS-Add-Modify-Printer Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Add-Modify-Printer request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer.

 </UL>

 <P>Group 2: Printer Object Attributes

 <UL>

 	<P>"banner-end-default" (name(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a banner page name that is
 	printed after files in a job. The reserved name "none" is used to
 	specify that no banner page should be printed.

 	<P>"banner-start-default" (name(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a banner page name that is
 	printed before files in a job. The reserved name "none" is used to
 	specify that no banner page should be printed.

 	<P>"device-uri" (uri):

 	<P>The client OPTIONALLY supplies a device URI for the
 	specified printer.

 	<P>"ppd-name" (name(127)):

 	<P>The client OPTIONALLY supplies a PPD name for the specified
 	printer.

 	<P>"printer-is-accepting-jobs" (boolean):

 	<P>The client OPTIONALLY supplies this boolean attribute
 	indicating whether or not the printer object should accept new jobs.

 	<P>"printer-info" (text(127)):

 	<P>The client OPTIONALLY supplies this attribute indicating the
 	printer information string.

 	<P>"printer-location" (text(127)):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	textual location of the printer.

 	<P>"printer-more-info" (uri):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	URI for additional printer information.

 	<P>"printer-state" (type2 enum):

 	<P>The client OPTIONALLY supplies this attribute indicating the
 	initial/current state of the printer. Only the "idle" and "stopped"
 	enumerations are recognized.

 	<P>"printer-state-message" (text(MAX)):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	textual reason for the current printer state.

 	<P>"requesting-user-name-allowed" (1setof name(127) | delete)
 	<P><I>OR</I>
 	<P>"requesting-user-name-denied" (1setof name(127) | delete):

 	<P>The client OPTIONALLY supplies one of these attributes to
 	specify an access control list for incoming print jobs. To allow
 	all users access to a printer, use the delete tag for the
 	attribute value.

 </UL>

 <P>The CUPS-Add-Modify-Printer request can optionally be followed by a PPD
 file or System V interface script to be used for the printer. The
 "ppd-name" attribute overrides any file that is attached to the end of
 the request with a local CUPS PPD file.

 <H3>CUPS-Add-Modify-Printer Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Add-Modify-Printer Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Delete-Printer Operation</H2>

 <P>The CUPS-Delete-Printer operation (0x4004) removes an existing
 printer from the system.

 <H3>CUPS-Delete-Printer Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Delete-Printer request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer.

 </UL>

 <H3>CUPS-Delete-Printer Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Delete-Printer Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Get-Classes Operation</H2>

 <P>The CUPS-Get-Classes operation (0x4005) returns the printer
 attributes for every printer class known to the system. This may
 include printer classes that are not served directly by the server.

 <H3>CUPS-Get-Classes Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Get-Classes request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"limit" (integer (1:MAX)):

 	<P>The client OPTIONALLY supplies this attribute limiting the
 	number of printer classes that are returned.

 	<P>"printer-info" (text(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies this attribute to
 	select which printer classes are returned.

 	<P>"printer-location" (text(127)):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies this attribute to
 	select which printer classes are returned.

 	<P>"printer-type" (type2 enum):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a printer type enumeration to
 	select which printer classes are returned.

 	<P>"printer-type-mask" (type2 enum):

 	<P><I>(CUPS 1.1 and higher)</I>

 	<P>The client OPTIONALLY supplies a printer type mask
 	enumeration to select which bits are used in the "printer-type"
 	attribute.

 	<P>"requested-attributes" (1setOf keyword) :

 	<P>The client OPTIONALLY supplies a set of attribute names
 	and/or attribute group names in whose values the requester is
 	interested. If the client omits this attribute, the server responds as
 	if this attribute had been supplied with a value of 'all'.

 </UL>

 <H3>CUPS-Get-Classes Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Get-Classes Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Printer Class Object Attributes

 <UL>

 	<P>The set of requested attributes and their current values for
 	each printer class.

 </UL>

 <H2>CUPS-Add-Modify-Class Operation</H2>

 <P>The CUPS-Add-Modify-Class operation (0x4006) adds a new printer class or
 modifies and existing printer class on the system.

 <H3>CUPS-Add-Modify-Class Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Add-Modify-Class request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer class.

 </UL>

 <P>Group 2: Printer Object Attributes

 <UL>

 	<P>"member-uris" (1setof uri):

 	<P>The client OPTIONALLY supplies the "member-uris" set
 	specifying the printers and printer classes that are part of the class.

 	<P>"printer-is-accepting-jobs" (boolean):

 	<P>The client OPTIONALLY supplies this boolean attribute
 	indicating whether or not the class object should accept new jobs.

 	<P>"printer-info" (text(127)):

 	<P>The client OPTIONALLY supplies this attribute indicating the
 	printer information string.

 	<P>"printer-location" (text(127)):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	textual location of the class.

 	<P>"printer-more-info" (uri):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	URI for additional class information.

 	<P>"printer-state" (type2 enum):

 	<P>The client OPTIONALLY supplies this attribute indicating the
 	initial/current state of the class. Only the "idle" and "stopped"
 	enumerations are recognized.

 	<P>"printer-state-message" (text(MAX)):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	textual reason for the current class state.

 	<P>"requesting-user-name-allowed" (1setof name(127))
 	<P><I>OR</I>
 	<P>"requesting-user-name-denied" (1setof name(127)):

 	<P>The client OPTIONALLY supplies one of these attributes to
 	specify an access control list for incoming print jobs. To allow
 	all users access to a class, use the delete tag for the
 	attribute value.

 </UL>

 <H3>CUPS-Add-Modify-Class Response</H3>

 <P>The following groups of attributes are send as part of the CUPS-Add-Modify-Class Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Delete-Class Operation</H2>

 <P>The CUPS-Delete-Class operation (0x4007) removes an existing printer
 class from the system.

 <H3>CUPS-Delete-Class Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Delete-Class request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer class.

 </UL>

 <H3>CUPS-Delete-Class Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Delete-Class Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Accept-Jobs Operation</H2>

 <P>The CUPS-Accept-Jobs operation (0x4008) sets the
 "printer-is-accepting-jobs" attribute to true for the specified printer
 or printer class.

 <H3>CUPS-Accept-Jobs Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Accept-Jobs request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer or printer class.

 </UL>

 <H3>CUPS-Accept-Jobs Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Accept-Jobs Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Reject-Jobs Operation</H2>

 <P>The CUPS-Reject-Jobs operation (0x4009) sets
 the"printer-is-accepting-jobs" attribute to false for the specified
 printer or printer class.

 <H3>CUPS-Reject-Jobs Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Reject-Jobs request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer or printer class.

 </UL>

 <P>Group 2: Printer Object Attributes

 <UL>

 	<P>"printer-state-message" (text(MAX)):

 	<P>The client OPTIONALLY supplies this attribute indicating a
 	textual reason for the current printer state.

 </UL>

 <H3>CUPS-Reject-Jobs Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Reject-Jobs Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Set-Default Operation</H2>

 <P>The CUPS-Set-Default operation (0x400A) sets the default printer
 destination for all clients when a resource name of "/printers" is
 specified.

 <H3>CUPS-Set-Default Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Set-Default request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri):

 	<P>The client MUST supply a URI for the specified printer or
 	printer class.

 </UL>

 <H3>CUPS-Set-Default Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Set-Default Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H2>CUPS-Get-Devices Operation</H2>

 <P>The CUPS-Get-Devices operation (0x400B) returns all of the supported
 device-uri's for the server (CUPS 1.1 and higher).

 <H3>CUPS-Get-Devices Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Get-Devices request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"device-class" (type1 keyword):

 	<P>The client OPTIONALLY supplies a device class keyword to select
 	which devices are returned.

 	<P>"limit" (integer (1:MAX)):

 	<P>The client OPTIONALLY supplies this attribute limiting the number of
 	devices that are returned.

 	<P>"requested-attributes" (1setOf keyword) :

 	<P>The client OPTIONALLY supplies a set of attribute names and/or
 	attribute group names in whose values the requester is interested. If
 	the client omits this attribute, the server responds as if this
 	attribute had been supplied with a value of 'all'.

 </UL>

 <H3>CUPS-Get-Devices Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Get-Devices Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: Device Object Attributes

 <UL>

 	<P>The set of requested attributes and their current values for
 	each device.

 </UL>

 <H2>CUPS-Get-PPDs Operation</H2>

 <P>The CUPS-Get-PPDs operation (0x400C) returns all of the locally
 available PPD files on the system (CUPS 1.1 and higher).

 <H3>CUPS-Get-PPDs Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Get-PPDs request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"limit" (integer (1:MAX)):

 	<P>The client OPTIONALLY supplies this attribute limiting the number of
 	PPDs that are returned.

 	<P>"ppd-make" (text(127)):

 	<P>The client OPTIONALLY supplies a printer manufacturer to select
 	which PPDs are returned.

 	<P>"requested-attributes" (1setOf keyword) :

 	<P>The client OPTIONALLY supplies a set of attribute names and/or
 	attribute group names in whose values the requester is interested. If
 	the client omits this attribute, the server responds as if this
 	attribute had been supplied with a value of 'all'.

 </UL>

 <H3>CUPS-Get-PPDs Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Get-PPDs Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <P>Group 2: PPD Attributes

 <UL>

 	<P>The set of requested attributes and their current values for each
 	PPD file.

 </UL>

 <H2>CUPS-Move-Job Operation</H2>

 <P>The CUPS-Move-Job operation (0x400D) moves an active print job to a
 different printer (CUPS 1.1 and higher).

 <H3>CUPS-Move-Job Request</H3>

 <P>The following groups of attributes are supplied as part of the
 CUPS-Move-Job request:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.1 of the IPP Model and
 	Semantics document.

 	<P>"printer-uri" (uri) and "job-id" (integer)
 	<P><I>OR</I>
 	<P>"job-uri":

 	<P>The client MUST supply a URI for the specified printer and
 	a job ID number, or the job URI.

 </UL>

 <P>Group 2: Job Template Attributes

 <UL>

 	<P>"job-printer-uri" (uri)

 	<P>The client MUST supply a URI for a printer on the same server.

 </UL>

 <H3>CUPS-Move-Job Response</H3>

 <P>The following groups of attributes are send as part of the
 CUPS-Move-Job Response:

 <P>Group 1: Operation Attributes

 <UL>

 	<P>Status Message:

 	<P>The standard response status message.

 	<P>Natural Language and Character Set:

 	<P>The "attributes-charset" and "attributes-natural-language"
 	attributes as described in section 3.1.4.2 of the IPP Model and
 	Semantics document.

 </UL>

 <H1>Attributes</H1>

 <P>CUPS provides many extension attributes to support multiple devices,
 PPD files, standard job filters, printers, and printer classes.

 <H2>Device Attributes</H2>

 <P>Device attributes are returned by the CUPS-Get-Devices operation and
 enumerate all of the available hardware devices and network protocols
 that are supported by the server.

 <H3>device-class (type2 keyword)</H3>

 <P>The device-class attribute specifies the class of device and can be
 one of the following:

 <UL>

 	<LI>"file" - a disk file.

 	<LI>"direct" - a parallel or fixed-rate serial data port,
 	currently used for Centronics, IEEE-1284, and USB printer
 	ports.

 	<LI>"serial" - a variable-rate serial port.

 	<LI>"network" - a network connection, typically via AppSocket,
 	HTTP, IPP, LPD, or SMB/CIFS protocols.

 </UL>

 <H3>device-info (text(127))</H3>

 <P>The device-info attribute specifies a human-readable string describing
 the device, e.g. "Parallel Port #1".

 <H3>device-make-and-model (text(127))</H3>

 <P>The device-makr-and-model attribute specifies a device
 identification string provided by the printer connected to the device.
 If the device or printer does not support identification then this
 attribute contains the string "unknown".

 <H3>device-uri (uri)</H3>

 <P>The device-uri attribute specifies a unique identifier for the
 device. The actual format of the device-uri string depends on the value
 of the device-class attribute:

 <UL>

 	<LI>"file" - The device-uri will be of the form
 	"file:/path/to/filename".

 	<LI>"direct" - The device-uri will be of the form
 	"method:/dev/filename", where method may be "parallel" or "usb"
 	in the current implementation.

 	<LI>"serial" - The device-uri will be of the form
 	"serial:/dev/filename?baud=value+parity=value+flow=value".
 	The baud value is the data rate in bits per second; the
 	supported values depend on the underlying hardware.
 	The parity value can be one of "none", "even", or "odd".
 	The flow value can be one of "none", "soft" (XON/XOFF
 	handshaking), "hard" or "rts/cts" (RTS/CTS handshaking),
 	or "dtrdsr" (DTR/DSR handshaking).

 	<P>The URI returned by CUPS-Get-Devices will contain the
 	maximum baud rate supported by the device and the best
 	type of flow control available ("soft" or "hard").

 	<LI>"network" - The device-uri will be of the form
 	"method://[username:password@]hostname[:port]/[resource]",
 	where method may be "http", "ipp", "lpd", "smb", or
 	"socket" in the current implementation.

 	<P>The URI returned by CUPS-Get-Devices will only contain
 	the method name followed by two slashes ("method://").
 	It is up to the client application to add the appropriate
 	host and other information when adding a new printer.

 	<P>The URI returned by Get-Printer-Attributes and
 	CUPS-Get-Printers has any username and password information
 	stripped; the information is still stored and used by the
 	server internally to perform any needed authentication.

 </UL>

 <H2>Job Template Attributes</H2>

 <H3>blackplot (boolean)</H3>

 <P>The blackplot attribute specifies whether HP-GL/2 plot files should be
 rendered entirely in black ink (blackplot=true) or using the colors and shades
 specified in the file (blackplot=false). The default value is false.

 <H3>brightness (integer(0:200))</H3>

 <P>The brightness attribute specifies the overall brightness of the printed
 output in percent. A brightness of 100 is normal, while 200 is twice as
 bright and 50 is half as bright. The default value is 100.

 <P>Brightness is applied to the Cyan, Magenta, Yellow, and Black values using
 the function "f(x) = brightness / 100 * x".

 <H3>columns (integer(1:4))</H3>

 <P>The columns attribute specifies the number of columns to generate when
 printing text files. The default value is 1.

 <H3>cpi (type2 enum)</H3>

 <P>The cpi attribute specifies the number of characters per inch when
 printing text files. Only the values 10, 12, and 17 are currently
 supported. The default value is 10.

 <H3>fitplot (boolean)</H3>

 <P>The fitplot attribute specifies whether to scale HP-GL/2 plot files to
 fit on the selected media (fitplot=true) or use the physical scale specified
 in the plot file (fitplot=false). The default value is false.

 <H3>gamma (integer(1:10000))</H3>

 <P>The gamma attribute specifies the luminance correction for the output.
 A value of 1000 specifies no correction, while values of 2000 and 500 will
 generate lighter and darker output, respectively. The default value is
 1000.

 <P>Gamma is applied to the Red, Green, and Blue values (or luminance for
 grayscale output) using the function "f(x) = x<SUP>(1000/gamma)</SUP>".

 <H3>hue (integer(-180:180))</H3>

 <P>The hue attribute specifies a color hue rotation when printing image
 files. The default value is 0.

 <H3>job-billing (text(MAX))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-billing attribute provides a text value to associate with a job
 for billing purposes.

 <H3>job-hold-until (keyword | name(MAX))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-hold-until attribute specifies a hold time. In addition to the
 standard IPP/1.1 keyword names, CUPS supports name values of the form
 "HH:MM" and "HH:MM:SS" that specify a hold time. The hold time is in
 Greenwich Mean Time (GMT) and <I>not</I> in the local time zone. If the
 specified time is less than the current time, the job is held until the
 next day.

 <H3>job-sheets (1setof type3 keyword | name(MAX))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-sheets attribute specifies one or two banner files that are printed
 before and after a job. The reserved value of "none" disables banner printing.
 The default value is stored in the job-sheets-default attribute.

 <P>If only one value is supplied, the banner file is printed before the job.
 If two values are supplied, the first value is used as the starting banner
 file and the second as the ending banner file.

 <H3>job-originating-host-name (name(MAX))</H3>

 <P><I>(CUPS 1.1.5 and higher)</I>

 <P>The job-originating-host-name attribute specifies the host
 from which the job was queued. The value will be the hostname or
 IP address of the client depending on whether hostname
 resolution is enabled.  The localhost address (127.0.0.1) is
 <B>always</B> resolved to the name "localhost".

 <P>This attribute is read-only.

 <H3>lpi (type2 enum)</H3>

 <P>The lpi attribute specifies the number of lines per inch when
 printing text files. Only the values 6 and 8 are currently supported.
 The default value is 6.

 <H3>mirror (boolean)</H3>

 <P>The mirror attribute specifies whether pages are mirrored on
 their X axis, which is useful for printing transfer images on
 special media. The default value is false.

 <H3>natural-scaling (integer(1:1000))</H3>

 <P><I>(CUPS 1.1.9 and higher)</I>

 <P>The natural-scaling attribute specifies the scaling of image files with
 respect to the natural image size. A value of 100 specifies that the image
 file should exactly the natural size, while 50 is half the natural size
 and 200 is twice the natural size. The default value is 100.

 <P>The ppi option can be used to override the natural resolution of the
 image, which controls the natural size.

 <H3>number-up-layout (type2 keyword)</H3>

 <P><I>(CUPS 1.1.15 and higher)</I>

 <P>The number-up-layout attribute specifies the order each input
 page is placed on each output page. The following keywords are
 presently defined:

 <UL>

 	<LI><CODE>btlr</CODE> - Bottom to top, left to right</LI>

 	<LI><CODE>btrl</CODE> - Bottom to top, right to left</LI>

 	<LI><CODE>lrbt</CODE> - Left to right, bottom to top</LI>

 	<LI><CODE>lrtb</CODE> - Left to right, top to bottom (default)</LI>

 	<LI><CODE>rlbt</CODE> - Right to left, bottom to top</LI>

 	<LI><CODE>rltb</CODE> - Right to left, top to bottom</LI>

 	<LI><CODE>tblr</CODE> - Top to bottom, left to right</LI>

 	<LI><CODE>tbrl</CODE> - Top to bottom, right to left</LI>

 </UL>

 <H3>page-border (type2 keyword)</H3>

 <P><I>(CUPS 1.1.15 and higher)</I>

 <P>The page-border attribute specifies whether a border is
 draw around each page. The following keywords are presently
 defined:

 <UL>

 	<LI><CODE>double</CODE> - Two hairline borders are drawn</LI>

 	<LI><CODE>double-thick</CODE> - Two 1pt borders are drawn</LI>

 	<LI><CODE>none</CODE> - No border is drawn (default)</LI>

 	<LI><CODE>single</CODE> - A single hairline border is drawn</LI>

 	<LI><CODE>single-thick</CODE> - A single 1pt border is drawn</LI>

 </UL>

 <H3>page-bottom (integer(0:MAX))</H3>

 <P>The page-bottom attribute specifies the bottom margin in points (72 points
 equals 1 inch). The default value is the device physical margin.

 <H3>page-label (text(MAX))</H3>

 <P><I>(CUPS 1.1.7 and higher)</I>

 <P>The page-label attribute provides a text value to place in
 the header and footer on each page. If a classification level is
 set on the server, then this classification is printed before
 the page label.

 <H3>page-left (integer(0:MAX))</H3>

 <P>The page-left attribute specifies the left margin in points (72 points
 equals 1 inch). The default value is the device physical margin.

 <H3>page-right (integer(0:MAX))</H3>

 <P>The page-right attribute specifies the right margin in points (72 points
 equals 1 inch). The default value is the device physical margin.

 <H3>page-set (type2 keyword)</H3>

 <P>The page-set attribute specifies which pages to print in a file. The
 supported keywords are "all", "even", and "odd". The default value is
 "all".

 <H3>page-top (integer(0:MAX))</H3>

 <P>The page-top attribute specifies the top margin in points (72 points
 equals 1 inch). The default value is the device physical margin.

 <H3>penwidth (integer(0:MAX))</H3>

 <P>The penwidth attribute specifies the default pen width in micrometers
 when printing HP-GL/2 plot files. The default value is 1000 (1 millimeter).

 <H3>position (type2 keyword)</H3>

 <P>The position attribute specifies the location of image files on the
 media. The following keyword values are recognized:

 <UL>

 	<LI><CODE>center</CODE> - Center the image on the page (default)

 	<LI><CODE>top</CODE> - Print the image centered at the top of the page

 	<LI><CODE>left</CODE> - Print the image centered on the left of page

 	<LI><CODE>right</CODE> - Print the image centered on the right of the page

 	<LI><CODE>top-left</CODE> - Print the image at the top left corner of
 	the page

 	<LI><CODE>top-right</CODE> - Print the image at the top right corner of
 	the page

 	<LI><CODE>bottom</CODE> - Print the image centered at the bottom of
 	the page

 	<LI><CODE>bottom-left</CODE> - Print the image at the bottom left
 	corner of the page

 	<LI><CODE>bottom-right</CODE> - Print the image at the bottom right
 	corner of the page

 </UL>

 <H3>ppi (integer(1:MAX))</H3>

 <P>The ppi attribute specifies the resolution of an image file in pixels
 per inch. The default value is the resolution included with the file or
 128 if no resolution information is available.

 <H3>prettyprint (boolean)</H3>

 <P>The prettyprint attribute specifies whether text files should be printed
 with a shaded header and keyword highlighting (prettyprint=true) or without
 additional formatting (prettyprint=false). The default value is false.

 <H3>saturation (integer(0:200))</H3>

 <P>The saturation attribute specifies the color saturation when
 printing image files. A saturation of 100 is normal, while values of 50
 and 200 will be half and twice as colorful, respectively. The default
 value is 100.

 <H3>scaling (integer(1:1000))</H3>

 <P>The scaling attribute specifies the scaling of image files with
 respect to the selected media. A value of 100 specifies that the image
 file should fit 100% of the page, or as much as possible given the
 image dimensions. The default value is unspecified.

 <P>The scaling attribute overrides the ppi attribute if specified.

 <H3>wrap (boolean)</H3>

 <P>The wrap attribute specifies whether long lines should be wrapped
 (wrap=true) or not (wrap=false) when printing text files. The default
 value is true.

 <H2>PPD Attributes</H2>

 <H3>ppd-natural-language (naturalLanguage)</H3>

 <P>The ppd-natural-language attribute specifies the language encoding
 of the PPD file (the LanguageVersion attribute in the PPD file). If the
 language is unknown or undefined then "en" (English) is assumed.

 <H3>ppd-make (text(127))</H3>

 <P>The ppd-make attribute specifies the manufacturer of the printer
 (the Manufacturer attribute in the PPD file). If the manufacturer
 is not specified in the PPD file then an educated guess is made using
 the NickName attribute in the PPD file.

 <H3>ppd-make-and-model (text(127))</H3>

 <P>The ppd-make-and-model attribute specifies the manufacturer and model
 name of the PPD file (the NickName attribute in the PPD file). If the
 make and model is not specified in the PPD file then the ModelName or
 ShortNickName attributes are used instead.

 <H3>ppd-name (name(255))</H3>

 <P>The ppd-name attribute specifies the PPD filename on the server
 relative to the model directory. The forward slash (/) is used to
 delineate directories.

 <H2>Printer Attributes</H2>

 <H3>job-k-limit (integer)</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-k-limit attribute specifies the maximum number of kilobytes that
 may be printed by a user, including banner files. The default value of 0
 specifies that there is no limit.

 <H3>job-page-limit (integer)</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-page-limit attribute specifies the maximum number of pages that
 may be printed by a user, including banner files. The default value of 0
 specifies that there is no limit.

 <H3>job-quota-period (integer)</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-quota-period attribute specifies the time period used for quota
 calculations, in seconds. The default value of 0 specifies that the limits
 apply to all jobs that have been printed by a user that are still known to
 the system.

 <H3>job-sheets-supported (1setof type3 keyword | name(MAX))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The job-sheets-supported attribute specifies the available banner files.
 There will always be at least one banner file available called "none".

 <H3>printer-type (type2 enum)</H3>

 <P>The printer-type attribute specifies printer type and capability bits for
 the printer or class. The default value is computed from internal state
 information and the PPD file for the printer. The following bits are defined:

 <CENTER><TABLE WIDTH="80%" BORDER>
 <TR>
 	<TH>Bit</TH>
 	<TH>Description</TH>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000001</TD>
 	<TD VALIGN="TOP">Is a printer class.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000002</TD>
 	<TD VALIGN="TOP">Is a remote destination.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000004</TD>
 	<TD VALIGN="TOP">Can print in black.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000008</TD>
 	<TD VALIGN="TOP">Can print in color.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000010</TD>
 	<TD VALIGN="TOP">Can print on both sides of the page in hardware.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000020</TD>
 	<TD VALIGN="TOP">Can staple output.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000040</TD>
 	<TD VALIGN="TOP">Can do fast copies in hardware.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000080</TD>
 	<TD VALIGN="TOP">Can do fast copy collation in hardware.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000100</TD>
 	<TD VALIGN="TOP">Can punch output.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000200</TD>
 	<TD VALIGN="TOP">Can cover output.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000400</TD>
 	<TD VALIGN="TOP">Can bind output.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00000800</TD>
 	<TD VALIGN="TOP">Can sort output.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00001000</TD>
 	<TD VALIGN="TOP">Can handle media up to US-Legal/A4.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00002000</TD>
 	<TD VALIGN="TOP">Can handle media from US-Legal/A4 to ISO-C/A2.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00004000</TD>
 	<TD VALIGN="TOP">Can handle media larger than ISO-C/A2.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00008000</TD>
 	<TD VALIGN="TOP">Can handle user-defined media sizes.</TD>
 </TR>
 <TR>
 	<TD VALIGN="TOP">0x00010000</TD>
 	<TD VALIGN="TOP">Is an implicit (server-generated) class.</TD>
 </TR>
 </TABLE></CENTER>

 <H3>printer-type-mask (type2 enum)</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The printer-type-mask attribute is used to choose printers or classes with
 the CUPS-Get-Printers and CUPS-Get-Classes operations. The bits are defined
 identically to the printer-type attribute and default to all 1's.

 <H3>requesting-user-name-allowed (1setof name(127))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The requesting-user-name-allowed attribute lists all of the users that are
 allowed to access a printer or class. Either this attribute or the
 requesting-user-name-denied attribute will be defined, but not both.

 <H3>requesting-user-name-denied (1setof name(127))</H3>

 <P><I>(CUPS 1.1 and higher)</I>

 <P>The requesting-user-name-denied attribute lists all of the users that are
 not allowed to access a printer or class. Either this attribute or the
 requesting-user-name-allowed attribute will be defined, but not both.

 <H2>Printer Class Attributes</H2>

 <H3>member-names (1setof name(127))</H3>

 <P>The member-names attribute specifies each of the printer-name attributes of
 the member printers and classes. Each name corresponds to the same element of
 the member-uris attribute.

 <H3>member-uris (1setof uri)</H3>

 <P>The member-uris attribute specifies each of the printer-uri attributes of
 the member printers and classes. Each URI corresponds to the same element of
 the member-names attribute.

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