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<h2 class='title'><a name='INTRODUCTION'>Introduction</a></h2>

<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>

<p>CUPS also provides 15 new operations and many new attributes
to support multiple IPP printers and printer classes on a single
host.</p>

<h3 class='title'><a name='IPP_URIS'>IPP URIs</a></h3>

<p>CUPS supports the "http", "https", and "ipp" schemes. The
following resource names are used:</p>

<dl>

	<dt><tt>scheme://hostname:port/</tt></dt>

	<dd>Can be used for all "get" operations and for server
	subscriptions.</dd>

	<dt><tt>scheme://hostname:port/admin/</tt></dt>

	<dd>Used for all administrative operations.</dd>

	<dt><tt>scheme://hostname:port/classes/name</tt></dt>

	<dd>Specifies a printer class.</dd>

	<dt><tt>scheme://hostname:port/jobs/id</tt></dt>

	<dd>Specifies a job.</dd>

	<dt><tt>scheme://hostname:port/printers/name</tt></dt>

	<dd>Specifies a printer.</dd>

</dl>

<p>So a typical printer URI would be
"ipp://foo.bar.com/printers/LaserJet". In addition, the CUPS
server also supports normal browser access via
"http://hostname:port/" and "https://hostname:port/".</p>

<h3 class='title'><a name='IPP_OPERATIONS'>CUPS IPP Operations</a></h3>

<p>CUPS provides 14 extension operations in addition to most of the
standard IPP and registered extension operations:

<div class='table'><table align='center' border='1' width='80%'
summary='Supported Operations'>
<thead>
<tr>
	<TH VALIGN="TOP">Operation Name</th>
	<TH VALIGN="TOP">CUPS</th>
	<TH VALIGN="TOP">Code</th>
	<TH VALIGN="TOP">Brief Description</th>
</tr>
</thead>
<tbody>
<tr>
	<td><a href='#PRINT_JOB'>Print-Job</a></td>
	<td>1.0</td>
	<td>0x0002</td>
	<td>Print a file.</td>
</tr>
<tr>
	<td>Validate-Job</td>
	<td>1.0</td>
	<td>0x0004</td>
	<td>Validate job attributes.</td>
</tr>
<tr>
	<td><a href='#CREATE_JOB'>Create-Job</a></td>
	<td>1.1</td>
	<td>0x0005</td>
	<td>Create a print job.</td>
</tr>
<tr>
	<td>Send-Document</td>
	<td>1.1</td>
	<td>0x0006</td>
	<td>Send a file for a print job.</td>
</tr>
<tr>
	<td>Cancel-Job</td>
	<td>1.0</td>
	<td>0x0008</td>
	<td>Cancel a print job.</td>
</tr>
<tr>
	<td>Get-Job-Attributes</td>
	<td>1.0</td>
	<td>0x0009</td>
	<td>Get job attributes.</td>
</tr>
<tr>
	<td>Get-Jobs</td>
	<td>1.0</td>
	<td>0x000A</td>
	<td>Get all jobs.</td>
</tr>
<tr>
	<td>Get-Printer-Attributes</td>
	<td>1.0</td>
	<td>0x000B</td>
	<td>Get printer attributes.</td>
</tr>
<tr>
	<td>Hold-Job</td>
	<td>1.1</td>
	<td>0x000C</td>
	<td>Hold a job for printing.</td>
</tr>
<tr>
	<td>Release-Job</td>
	<td>1.1</td>
	<td>0x000D</td>
	<td>Release a job for printing.</td>
</tr>
<tr>
	<td>Restart-Job</td>
	<td>1.1</td>
	<td>0x000E</td>
	<td>Restarts a print job.</td>
</tr>
<tr>
	<td>Pause-Printer</td>
	<td>1.0</td>
	<td>0x0010</td>
	<td>Pause printing on a printer.</td>
</tr>
<tr>
	<td>Resume-Printer</td>
	<td>1.0</td>
	<td>0x0011</td>
	<td>Resume printing on a printer.</td>
</tr>
<tr>
	<td>Purge-Jobs</td>
	<td>1.0</td>
	<td>0x0012</td>
	<td>Purge all jobs.</td>
</tr>
<tr>
	<td><a href='#SET_JOB_ATTRIBUTES'>Set-Job-Attributes</a></td>
	<td>1.1</td>
	<td>0x0014</td>
	<td>Set attributes for a pending or held job.</td>
</tr>
<tr>
	<td><a href='#CREATE_PRINTER_SUBSCRIPTION'>Create-Printer-Subscription</a></td>
	<td>1.2</td>
	<td>0x0016</td>
	<td>Creates a subscription associated with a printer or the server.</td>
</tr>
<tr>
	<td>Create-Job-Subscription</td>
	<td>1.2</td>
	<td>0x0017</td>
	<td>Creates a subscription associated with a job.</td>
</tr>
<tr>
	<td>Get-Subscription-Attributes</td>
	<td>1.2</td>
	<td>0x0018</td>
	<td>Gets the attributes for a subscription.</td>
</tr>
<tr>
	<td>Get-Subscriptions</td>
	<td>1.2</td>
	<td>0x0019</td>
	<td>Gets the attributes for zero or more subscriptions.</td>
</tr>
<tr>
	<td>Renew-Subscription</td>
	<td>1.2</td>
	<td>0x001A</td>
	<td>Renews a subscription.</td>
</tr>
<tr>
	<td>Cancel-Subscription</td>
	<td>1.2</td>
	<td>0x001B</td>
	<td>Cancels a subscription.</td>
</tr>
<tr>
	<td>Get-Notifications</td>
	<td>1.2</td>
	<td>0x001C</td>
	<td>Get notification events for <tt>ippget</tt> subscriptions.</td>
</tr>
<tr>
	<td>Enable-Printer</td>
	<td>1.2</td>
	<td>0x0022</td>
	<td>Accepts jobs on a printer.</td>
</tr>
<tr>
	<td>Disable-Printer</td>
	<td>1.2</td>
	<td>0x0023</td>
	<td>Rejects jobs on a printer.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_DEFAULT'>CUPS-Get-Default</a></td>
	<td>1.0</td>
	<td>0x4001</td>
	<td>Get the default destination.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_PRINTERS'>CUPS-Get-Printers</a></td>
	<td>1.0</td>
	<td>0x4002</td>
	<td>Get all of the available printers.</td>
</tr>
<tr>
	<td><a href='#CUPS_ADD_MODIFY_PRINTER'>CUPS-Add-Modify-Printer</a></td>
	<td>1.0</td>
	<td>0x4003</td>
	<td>Add or modify a printer.</td>
</tr>
<tr>
	<td><a href='#CUPS_DELETE_PRINTER'>CUPS-Delete-Printer</a></td>
	<td>1.0</td>
	<td>0x4004</td>
	<td>Delete a printer.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_CLASSES'>CUPS-Get-Classes</a></td>
	<td>1.0</td>
	<td>0x4005</td>
	<td>Get all of the available printer classes.</td>
</tr>
<tr>
	<td><a href='#CUPS_ADD_MODIFY_CLASS'>CUPS-Add-Modify-Class</a></td>
	<td>1.0</td>
	<td>0x4006</td>
	<td>Add or modify a printer class.</td>
</tr>
<tr>
	<td><a href='#CUPS_DELETE_CLASS'>CUPS-Delete-Class</a></td>
	<td>1.0</td>
	<td>0x4007</td>
	<td>Delete a printer class.</td>
</tr>
<tr>
	<td><a href='#CUPS_ACCEPT_JOBS'>CUPS-Accept-Jobs</a></td>
	<td>1.0</td>
	<td>0x4008</td>
	<td>Accept jobs on a printer or printer class.</td>
</tr>
<tr>
	<td><a href='#CUPS_REJECT_JOBS'>CUPS-Reject-Jobs</a></td>
	<td>1.0</td>
	<td>0x4009</td>
	<td>Reject jobs on a printer or printer class.</td>
</tr>
<tr>
	<td><a href='#CUPS_SET_DEFAULT'>CUPS-Set-Default</a></td>
	<td>1.0</td>
	<td>0x400A</td>
	<td>Set the default destination.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_DEVICES'>CUPS-Get-Devices</a></td>
	<td>1.1</td>
	<td>0x400B</td>
	<td>Get all of the available devices.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_PPDS'>CUPS-Get-PPDs</a></td>
	<td>1.1</td>
	<td>0x400C</td>
	<td>Get all of the available PPDs.</td>
</tr>
<tr>
	<td><a href='#CUPS_MOVE_JOB'>CUPS-Move-Job</a></td>
	<td>1.1</td>
	<td>0x400D</td>
	<td>Move a job to a different printer.</td>
</tr>
<tr>
	<td><a href='#CUPS_AUTHENTICATE_JOB'>CUPS-Authenticate-Job</a></td>
	<td>1.2</td>
	<td>0x400E</td>
	<td>Authenticate a job for printing.</td>
</tr>
<tr>
	<td><a href='#CUPS_GET_PPD'>CUPS-Get-PPD</a></td>
	<td>1.3</td>
	<td>0x400F</td>
	<td>Get a PPD file.</td>
</tr>
</tbody>
</table></div>

<h2 class='title'><a name='OPERATIONS'>Operations</a></h2>

<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.

<h3 class='title'><a name='PRINT_JOB'>Print-Job Operation</a></h3>

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

<h4>Print-Job Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<p>Group 2: Job Template Attributes

<dl>

	<dt>"auth-info" (1setOf text(MAX)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies one or more authentication values as specified by the "auth-info-required" attribute.

	<dt>"job-billing" (text(MAX)):<span class='info'>CUPS 1.1</span>

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

	<dt>"job-sheets" (1setof type3 keyword | name(MAX)):<span class='info'>CUPS 1.1</span>

	<dd>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.

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

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

	<dd>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.

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

	<dt>Other Job Template Attributes

</dl>

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

<h4>Print-Job Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Job Attributes

<dl>

	<dt>Standard Job Attributes

</dl>

<p>Group 3: Unsupported Attributes (status=client-eror-attributes-or-values-not-supported)

<dl>

	<dt>auth-info-required (1setOf Type2 keyword)

	<dd>The required authentication information.

</dl

<h3 class='title'><span class='info'>CUPS 1.1</span><a name='CREATE_JOB'>Create-Job Operation</a></h3>

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

<h4>Create-Job Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<p>Group 2: Job Template Attributes

<dl>

	<dt>"auth-info" (1setOf text(MAX)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies one or more authentication values as specified by the "auth-info-required" attribute.

	<dt>"job-billing" (text(MAX)):<span class='info'>CUPS 1.1</span>

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

	<dt>"job-sheets" (1setof type3 keyword | name(MAX)):<span class='info'>CUPS 1.1</span>

	<dd>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.

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

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

	<dd>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.

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

	<dt>Standard Job Template Attributes

</dl>

<h4>Create-Job Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Job Attributes

<dl>

	<dt>Standard Job Attributes

</dl>

<p>Group 3: Unsupported Attributes (status=client-eror-attributes-or-values-not-supported)

<dl>

	<dt>auth-info-required (1setOf Type2 keyword)

	<dd>The required authentication information.

</dl

<h3 class='title'><span class='info'>CUPS 1.1</span><a name='SET_JOB_ATTRIBUTES'>Set-Job-Attributes Operation</a></h3>

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

<h4>Set-Job-Attributes Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

	<dt>"printer-uri" (uri) and "job-id" (integer)
	<br><i>OR</i>
	<br>"job-uri":

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

</dl>

<p>Group 2: Job Template Attributes

<dl>

	<dt>"job-sheets" (1setof type3 keyword | name(MAX)):<span class='info'>CUPS 1.1</span>

	<dd>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.

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

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

	<dd>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.

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

	<dt>Other Job Template Attributes

</dl>

<h4>Set-Job-Attributes Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><span class='info'>CUPS 1.2</span><a
name='CREATE_PRINTER_SUBSCRIPTION'>Create-Printer-Subscription</a></h3>

<p>The Create-Printer-Subscription operation (0x0016) creates a
subscription for printer or server event notifications. CUPS
provides several additional events in addition to the standard
events in the IPP notifications specification.</p>

<h4>Create-Printer-Subscription Request</h4>

<p>The following groups of attributes are supplied as part of the
request:</p>

<p>Group 1: Operation Attributes</p>

<dl>

	<dt>Natural Language and Character Set:

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

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

	<dd>The printer
	(<tt>ipp://server/printers/printername</tt>), class
	(<tt>ipp://server/classes/classname</tt>), or server
	(<tt>ipp://server/</tt>) URI for event notifications.

	<dt>"notify-events" (1setOf keyword):

	<dd>The events to monitor. In addition to the standard
	events, CUPS adds the following keywords:
	<ul>

		<li><tt>printer-added</tt> - Get notified
		whenever a printer or class is added</li>

		<li><tt>printer-deleted</tt> - Get notified
		whenever a printer or class is deleted</li>

		<li><tt>printer-modified</tt> - Get notified
		whenever a printer or class is modified</li>

		<li><tt>server-audit</tt> - Get notified when a
		security condition occurs</li>

		<li><tt>server-restarted</tt> - Get notified when
		the server is restarted</li>

		<li><tt>server-started</tt> - Get notified when
		the server is started</li>

		<li><tt>server-stopped</tt> - Get notified when
		the server is stopped</li>

	</ul>

</dl>

<h4>Create-Printer-Subscription Response</h4>

<p>The following groups of attributes are send as part of the
response:</p>

<p>Group 1: Operation Attributes</p>

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Subscription Object Attributes</p>

<dl>

	<dt>"subscription-id" (integer):

	<dd>The subscription number.

</dl>

<h3 class='title'><a name='CUPS_GET_DEFAULT'>CUPS-Get-Default Operation</a></h3>

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

<h4>CUPS-Get-Default Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

	<dd>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'.

</dl>

<h4>CUPS-Get-Default Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Printer Object Attributes

<dl>

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

</dl>

<h3 class='title'><a name='CUPS_GET_PRINTERS'>CUPS-Get-Printers Operation</a></h3>

<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.

<h4>CUPS-Get-Printers Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

	<dt>"printer-info" (text(127)):<span class='info'>CUPS 1.1</span>

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

	<dt>"printer-location" (text(127)): <span class='info'>CUPS 1.1.7</span>

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

	<dt>"printer-type" (type2 enum): <span class='info'>CUPS 1.1.7</span>

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

	<dt>"printer-type-mask" (type2 enum): <span class='info'>CUPS 1.1.7</span>

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

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

	<dd>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'.

</dl>

<h4>CUPS-Get-Printers Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Printer Object Attributes

<dl>

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

</dl>

<h3 class='title'><a name='CUPS_ADD_MODIFY_PRINTER'>CUPS-Add-Modify-Printer Operation</a></h3>

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

<h4>CUPS-Add-Modify-Printer Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<p>Group 2: Printer Object Attributes

<dl>

	<dt>"auth-info-required" (1setOf type2 keyword):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies one or more authentication keywords that are required to communicate with the printer/remote queue.

	<dt>"job-sheets-default" (1setOf name(127)): <span
	class='info'>CUPS 1.1.7</span>

	<dd>The client OPTIONALLY supplies one or two banner page
	names that are printed before and after files in a job.
	The reserved name "none" is used to specify that no
	banner page should be printed.

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

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

	<dt>"port-monitor" (name(127)):

	<dd>The client OPTIONALLY supplies a port monitor name for the
	specified printer.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	<dt>"requesting-user-name-allowed" (1setof name(127) | delete)
	<br><i>OR</i>
	<br>"requesting-user-name-denied" (1setof name(127) | delete):

	<dd>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.

</dl>

<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.

<h4>CUPS-Add-Modify-Printer Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_DELETE_PRINTER'>CUPS-Delete-Printer Operation</a></h3>

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

<h4>CUPS-Delete-Printer Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<h4>CUPS-Delete-Printer Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_GET_CLASSES'>CUPS-Get-Classes Operation</a></h3>

<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.

<h4>CUPS-Get-Classes Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

	<dt>"printer-info" (text(127)): <span class='info'>CUPS 1.1.7</span>
	<dd>The client OPTIONALLY supplies this attribute to
	select which printer classes are returned.

	<dt>"printer-location" (text(127)): <span class='info'>CUPS 1.1.7</span>
	<dd>The client OPTIONALLY supplies this attribute to
	select which printer classes are returned.

	<dt>"printer-type" (type2 enum): <span class='info'>CUPS 1.1.7</span>
	<dd>The client OPTIONALLY supplies a printer type enumeration to
	select which printer classes are returned.

	<dt>"printer-type-mask" (type2 enum): <span class='info'>CUPS 1.1.7</span>
	<dd>The client OPTIONALLY supplies a printer type mask
	enumeration to select which bits are used in the "printer-type"
	attribute.

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

	<dd>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'.

</dl>

<h4>CUPS-Get-Classes Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Printer Class Object Attributes

<dl>

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

</dl>

<h3 class='title'><a name='CUPS_ADD_MODIFY_CLASS'>CUPS-Add-Modify-Class Operation</a></h3>

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

<h4>CUPS-Add-Modify-Class Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<p>Group 2: Printer Object Attributes

<dl>

	<dt>"auth-info-required" (1setOf type2 keyword):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies one or more authentication keywords that are required to communicate with the printer/remote queue.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	<dt>"requesting-user-name-allowed" (1setof name(127))
	<br><i>OR</i>
	<br>"requesting-user-name-denied" (1setof name(127)):

	<dd>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.

</dl>

<h4>CUPS-Add-Modify-Class Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_DELETE_CLASS'>CUPS-Delete-Class Operation</a></h3>

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

<h4>CUPS-Delete-Class Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<h4>CUPS-Delete-Class Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_ACCEPT_JOBS'>CUPS-Accept-Jobs Operation</a></h3>

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

<h4>CUPS-Accept-Jobs Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<h4>CUPS-Accept-Jobs Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_REJECT_JOBS'>CUPS-Reject-Jobs Operation</a></h3>

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

<h4>CUPS-Reject-Jobs Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<p>Group 2: Printer Object Attributes

<dl>

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

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

</dl>

<h4>CUPS-Reject-Jobs Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><a name='CUPS_SET_DEFAULT'>CUPS-Set-Default Operation</a></h3>

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

<h4>CUPS-Set-Default Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

</dl>

<h4>CUPS-Set-Default Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><span class='info'>CUPS 1.1</span><a name='CUPS_GET_DEVICES'>CUPS-Get-Devices Operation</a></h3>

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

<h4>CUPS-Get-Devices Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

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

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

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

	<dd>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'.

</dl>

<h4>CUPS-Get-Devices Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Device Object Attributes

<dl>

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

</dl>

<h3 class='title'><span class='info'>CUPS 1.1</span><a name='CUPS_GET_PPDS'>CUPS-Get-PPDs Operation</a></h3>

<p>The CUPS-Get-PPDs operation (0x400C) returns all of the
locally available PPD files on the system.</p>

<h4>CUPS-Get-PPDs Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

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

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

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

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

	<dt>"ppd-make-and-model" (text(127)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a make and model to select which PPDs are returned.

	<dt>"ppd-model-number" (integer):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a model number to select which PPDs are returned.

	<dt>"ppd-natural-language" (naturalLanguage):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a language to select which PPDs are returned.

	<dt>"ppd-product" (text(127)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a PostScript product string to select which PPDs are returned.

	<dt>"ppd-psversion" (text(127)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a PostScript version string to select which PPDs are returned.

	<dt>"ppd-type" (type1 keyword):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies a driver type to select which PPDs are returned.

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

	<dd>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'. Specify "ppd-make" to get a list of manufacturers.

</dl>

<h4>CUPS-Get-PPDs Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: PPD Attributes

<dl>

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

</dl>

<h3 class='title'><span class='info'>CUPS 1.1</span><a name='CUPS_MOVE_JOB'>CUPS-Move-Job Operation</a></h3>

<p>The CUPS-Move-Job operation (0x400D) moves an active print job
to a different printer.</p>

<h4>CUPS-Move-Job Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

	<dt>"printer-uri" (uri) and "job-id" (integer)
	<br><i>OR</i>
	<br>"job-uri":

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

</dl>

<p>Group 2: Job Template Attributes

<dl>

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

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

</dl>

<h4>CUPS-Move-Job Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<h3 class='title'><span class='info'>CUPS 1.2</span><a name='CUPS_AUTHENTICATE_JOB'>CUPS-Authenticate-Job Operation</a></h3>

<p>The CUPS-Authenticate-Job operation (0x400E) authenticate a
print job for printing. Typically this is used when printing to a
remote server. The authentication information is passed in the
HTTP request.</p>

<h4>CUPS-Authenticate-Job Request</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

	<dt>"printer-uri" (uri) and "job-id" (integer)
	<br><i>OR</i>
	<br>"job-uri":

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

</dl>

<p>Group 2: Job Attributes

<dl>

	<dt>"auth-info" (1setOf text(MAX)):<span class='info'>CUPS 1.3</span>

	<dd>The client OPTIONALLY supplies one or more authentication values as specified by the "auth-info-required" attribute.

</dl>

<h4>CUPS-Authenticate-Job Response</h4>

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

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

</dl>

<p>Group 2: Unsupported Attributes (status=client-eror-attributes-or-values-not-supported)

<dl>

	<dt>auth-info-required (1setOf Type2 keyword)

	<dd>The required authentication information.

</dl

<h3 class='title'><span class='info'>CUPS 1.3</span><a name='CUPS_GET_PPD'>CUPS-Get-PPD Operation</a></h3>

<p>The CUPS-Get-PPD operation (0x400F) gets a PPD file from the
server. The PPD file can be specified using a <tt>ppd-name</tt>
returned by <a href='#CUPS_GET_PPDS'><tt>CUPS-Get-PPDs</tt></a>
or using the <tt>printer-uri</tt> for a queue.</p>

<p>If the PPD file is found, <tt>successful-ok</tt> is returned with
the PPD file following the response data.</p>

<p>If the PPD file cannot be served by the local server because
the <tt>printer-uri</tt> attribute points to an external printer,
a <tt>cups-see-other</tt> status is returned with the correct
URI to use.</p>

<p>If the PPD file does not exist, <tt>client-error-not-found</tt> is
returned.</p>

<h4>CUPS-Get-PPD Request</h4>

<p>The following group of attributes is supplied as part of the
CUPS-Get-PPD request:

<p>Group 1: Operation Attributes

<dl>

	<dt>Natural Language and Character Set:

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

	<dt>"printer-uri" (uri)
	<br><i>OR</i>
	<br>"ppd-name" (name(255)):

	<dd>The client MUST supply a printer URI or PPD name.

</dl>

<h4>CUPS-Get-PPD Response</h4>

<p>The following group of attributes is sent as part of the
CUPS-Get-PPD Response:

<p>Group 1: Operation Attributes

<dl>

	<dt>Status Message:

	<dd>The standard response status message.

	<dt>Natural Language and Character Set:

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

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

	<dd>The printer that provides the actual PPD file when
	the status code is cups-see-other (0x280)

</dl>

<p>If the status code is <tt>successful-ok</tt>, the PPD file follows
the end of the IPP response.</p>


<h2 class='title'><a name='ATTRIBUTES'>Attributes</a></h2>

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

<h3 class='title'><a name='DEVICE_ATTRIBUTES'>Device Attributes</a></h3>

<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.</p>

<h4><a name="device-class">device-class (type2 keyword)</a></h4>

<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>

<h4><a name="device-id">device-id (text(127))</a><span class="info">CUPS 1.2</span></h4>

<p>The device-id attribute specifies the IEEE-1284 device ID
string for the device.</p>

<h4><a name="device-info">device-info (text(127))</a></h4>

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

<h4><a name="device-make-and-model">device-make-and-model (text(127))</a></h4>

<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".

<h4><a name="device-uri">device-uri (uri)</a></h4>

<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
	"scheme:/dev/filename" or "scheme://vendor/identifier",
	where scheme 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
	"scheme://[username:password@]hostname[:port]/[resource]",
	where scheme may be "http", "https", "ipp", "lpd", "smb", or
	"socket" in the current implementation.

	<p>The URI returned by CUPS-Get-Devices will only contain
	the scheme name ("scheme"). 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>

<h3 class='title'><a name='JOB_TEMPLATE_ATTRIBUTES'>Job Template Attributes</a></h3>

<h4><a name="auth-info">auth-info (1setOf text(MAX))</a><span class="info">CUPS 1.3</span></h4>

<p>The auth-info attribute specifies the authentication information to use when printing to a remote device. The order and content of each text value is specifed by the <a href="#auth-info-required">auth-info-required</a> printer attribute.

<h4><a name="blackplot">blackplot (boolean)</a></h4>

<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.

<h4><a name="brightness">brightness (integer(0:200))</a></h4>

<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".

<h4><a name="columns">columns (integer(1:4))</a></h4>

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

<h4><a name="cpi">cpi (type2 enum)</a></h4>

<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.

<h4><a name="fitplot">fitplot (boolean)</a></h4>

<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.

<h4><a name="gamma">gamma (integer(1:10000))</a></h4>

<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>".

<h4><a name="hue">hue (integer(-180:180))</a></h4>

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

<h4><a name="job-billing">job-billing (text(MAX))</a><span class='info'>CUPS 1.1</span></h4>

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

<h4><a name="job-hold-until">job-hold-until (keyword | name(MAX))</a><span class='info'>CUPS 1.1</span></h4>

<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
Universal Coordinated Time (UTC) 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.

<h4><a name="job-sheets">job-sheets (1setof type3 keyword | name(MAX))</a><span class='info'>CUPS 1.1</span></h4>

<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.

<h4><a name="job-originating-host-name">job-originating-host-name (name(MAX))</a></h4>

<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.

<h4><a name="lpi">lpi (type2 enum)</a></h4>

<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.

<h4><a name="mirror">mirror (boolean)</a></h4>

<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.

<h4><a name="natural-scaling">natural-scaling (integer(1:1000))</a><span class='info'>CUPS 1.1.9</span></h4>
<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.

<h4><a name="number-up-layout">number-up-layout (type2 keyword)</a><span class='info'>CUPS 1.1.15</span></h4>
<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>

<h4><a name="page-border">page-border (type2 keyword)</a><span class='info'>CUPS 1.1.15</span></h4>
<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>

<h4><a name="page-bottom">page-bottom (integer(0:MAX))</a></h4>

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

<h4><a name="page-label">page-label (text(MAX))</a><span class='info'>CUPS 1.1.7</span></h4>
<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.

<h4><a name="page-left">page-left (integer(0:MAX))</a></h4>

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

<h4><a name="page-right">page-right (integer(0:MAX))</a></h4>

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

<h4><a name="page-set">page-set (type2 keyword)</a></h4>

<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".

<h4><a name="page-top">page-top (integer(0:MAX))</a></h4>

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

<h4><a name="penwidth">penwidth (integer(0:MAX))</a></h4>

<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).

<h4><a name="position">position (type2 keyword)</a></h4>

<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>

<h4><a name="ppi">ppi (integer(1:MAX))</a></h4>

<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.

<h4><a name="prettyprint">prettyprint (boolean)</a></h4>

<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.

<h4><a name="saturation">saturation (integer(0:200))</a></h4>

<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.

<h4><a name="scaling">scaling (integer(1:1000))</a></h4>

<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.

<h4><a name="wrap">wrap (boolean)</a></h4>

<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.

<h3 class='title'><a name='PPD_ATTRIBUTES'>PPD Attributes</a></h3>

<h4><a name="ppd-device-id">ppd-device-id (text(127))</a></h4>

<p>The ppd-device-id attribute specifies the IEEE-1284 device ID
string for the device described by the PPD file.</p>

<h4><a name="ppd-make">ppd-make (text(127))</a></h4>

<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.

<h4><a name="ppd-make-and-model">ppd-make-and-model (text(127))</a></h4>

<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.

<h4><a name="ppd-model-number">ppd-model-number (integer)</a><span class="info">CUPS 1.3</span></h4>

<p>The ppd-model-number attribute provides the <tt>cupsModelNumber</tt> value from the PPD file.

<h4><a name="ppd-name">ppd-name (name(255))</a></h4>

<p>The ppd-name attribute specifies either the PPD filename on the server relative to the model directory or a URI that maps to a specific driver interface in the driver directory. The forward slash (/) is used to delineate directories.

<h4><a name="ppd-natural-language">ppd-natural-language (1setOf naturalLanguage)</a></h4>

<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.

<h4><a name="ppd-product">ppd-product (1setOf text(127))</a></h4>

<p>The ppd-product attribute specifies the Product attribute values in the PPD file.

<h4><a name="ppd-psversion">ppd-psversion (1setOf text(127))</a><span class="info">CUPS 1.3</span></h4>

<p>The ppd-product attribute specifies the PSVersion attribute values in the PPD file.

<h4><a name="ppd-type">ppd-type (type1 keyword)</a><span class="info">CUPS 1.3</span></h4>

<p>The ppd-type attribute specifies the type of driver described by the PPD file:</p>

<ul>

	<li><tt>fax</tt> - A facsimile or multi-function device</li>

	<li><tt>pdf</tt> - A PDF printer</li>

	<li><tt>postscript</tt> - A PostScript printer (no filters)</li>

	<li><tt>raster</tt> - A CUPS raster driver</li>

	<li><tt>unknown</tt> - An unknown or hybrid driver</li>

</ul>


<h3 class='title'><a name='PRINTER_ATTRIBUTES'>Printer Attributes</a></h3>

<h4><a name="auth-info-required">auth-info-required (1setOf type2 keyword)</a><span class="info">CUPS 1.3</span></h4>

<p>The auth-info-required attribute specifies the authentication information that is required for printing a job. The following keywords are recognized:</p>

<ul>

	<li><tt>domain</tt> - A domain name is required.</li>

	<li><tt>none</tt> - No authentication is required - this keyword can only appear by itself.</li>

	<li><tt>password</tt> - A password is required.</li>

	<li><tt>username</tt> - A username is required.</li>

</ul>

<h4><a name="job-k-limit">job-k-limit (integer)</a><span class='info'>CUPS 1.1</span></h4>

<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.

<h4><a name="job-page-limit">job-page-limit (integer)</a><span class='info'>CUPS 1.1</span></h4>

<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.

<h4><a name="job-quota-period">job-quota-period (integer)</a><span class='info'>CUPS 1.1</span></h4>

<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.

<h4><a name="job-sheets-supported">job-sheets-supported (1setof type3 keyword | name(MAX))</a><span class='info'>CUPS 1.1</span></h4>

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

<h4><a name="port-monitor">port-monitor" (name(127))</a></h4>

<p>The port-monitor attribute specifies the port monitor to use when printing
to this printer. The default port monitor is "none".

<h4><a name="port-monitor-supported">port-monitor-supported" (1setOf name(127))</a></h4>

<p>The port-monitor-supported attribute specifies the available port monitors.

<h4><a name="printer-type">printer-type (type2 enum)</a></h4>

<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:</p>

<div class='table'><table align='center' border='1' width='80%'
summary='Printer Type Bits'>
<thead>
<tr>
	<th>Bit</th>
	<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
	<td>0x00000001</td>
	<td>Is a printer class.</td>
</tr>
<tr>
	<td>0x00000002</td>
	<td>Is a remote destination.</td>
</tr>
<tr>
	<td>0x00000004</td>
	<td>Can print in black.</td>
</tr>
<tr>
	<td>0x00000008</td>
	<td>Can print in color.</td>
</tr>
<tr>
	<td>0x00000010</td>
	<td>Can print on both sides of the page in hardware.</td>
</tr>
<tr>
	<td>0x00000020</td>
	<td>Can staple output.</td>
</tr>
<tr>
	<td>0x00000040</td>
	<td>Can do fast copies in hardware.</td>
</tr>
<tr>
	<td>0x00000080</td>
	<td>Can do fast copy collation in hardware.</td>
</tr>
<tr>
	<td>0x00000100</td>
	<td>Can punch output.</td>
</tr>
<tr>
	<td>0x00000200</td>
	<td>Can cover output.</td>
</tr>
<tr>
	<td>0x00000400</td>
	<td>Can bind output.</td>
</tr>
<tr>
	<td>0x00000800</td>
	<td>Can sort output.</td>
</tr>
<tr>
	<td>0x00001000</td>
	<td>Can handle media up to US-Legal/A4.</td>
</tr>
<tr>
	<td>0x00002000</td>
	<td>Can handle media from US-Legal/A4 to ISO-C/A2.</td>
</tr>
<tr>
	<td>0x00004000</td>
	<td>Can handle media larger than ISO-C/A2.</td>
</tr>
<tr>
	<td>0x00008000</td>
	<td>Can handle user-defined media sizes.</td>
</tr>
<tr>
	<td>0x00010000</td>
	<td>Is an implicit (server-generated) class.</td>
</tr>
<tr>
	<td>0x00020000</td>
	<td>Is the a default printer on the network.</td>
</tr>
<tr>
	<td>0x00040000<td>
	<td>Is a facsimile device.</td>
</tr>
<tr>
	<td>0x00080000</td>
	<td>Is rejecting jobs.</td>
</tr>
<tr>
	<td>0x00100000</td>
	<td>Delete this queue.</td>
</tr>
<tr>
	<td>0x00200000</td>
	<td>Queue is not shared.</td>
</tr>
<tr>
	<td>0x00400000</td>
	<td>Queue requires authentication.</td>
</tr>
<tr>
	<td>0x00800000</td>
	<td>Queue supports CUPS command files.</td>
</tr>
<tr>
	<td>0x01000000</td>
	<td>Queue was automatically discovered and added.</td>
</tr>
</tbody>
</table></div>

<h4>printer-type-mask (type2 enum)<span class='info'>CUPS 1.1</span></h4>

<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.

<h4>requesting-user-name-allowed (1setof name(127))<span class='info'>CUPS 1.1</span></h4>

<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.

<h4>requesting-user-name-denied (1setof name(127))<span class='info'>CUPS 1.1</span></h4>

<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.

<h3 class='title'><a name='CLASS_ATTRIBUTES'>Printer Class Attributes</a></h3>

<h4>member-names (1setof name(127))</h4>

<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.

<h4>member-uris (1setof uri)</h4>

<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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