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INFO-DIR-SECTION Emacs
START-INFO-DIR-ENTRY
* rt-liberation: (rt-liberation).       Emacs Interface to RT
END-INFO-DIR-ENTRY


File: rt-liberation.info,  Node: Top,  Next: Introduction,  Prev: (dir),  Up: (dir)

The rt-liberation Manual
************************

This is the Manual for the rt-liberation system

   (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2020 Free Software
Foundation, Inc.

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU Free Documentation License,
     Version 1.2 or any later version published by the Free Software
     Foundation; with no Invariant Sections, no Front-Cover Texts, and
     no Back-Cover Texts.  A copy of the license is included in the
     section entitled "GNU Free Documentation License".

* Menu:

* Introduction::                Introduction to rt-liberation.
* Installation::                Setup rt-liberation to work on the system.

Using rt-liberation
* Queries::                     Retrieve particular tickets from the server.
* Ticket Browser::              Browse the query results.
* Ticket Viewer::               Interface to query results.

Extensions
* Gnus Integration::            Sending email to the RT server via Gnus.
* Tracking Updates::            Keeping up to date with ticket changes.
* Batch Operations::            Performing operations on batches of tickets.
* Local Storage::               Associate arbitrary data with tickets.

Copying and license
* Copying::                     The GNU General Public License gives you
                                permission to redistribute rt-liberation
                                on certain terms; it also explains that
                                there is no warranty.

* The GNU FDL::                 The license for this documentation.

Indices
* Concept Index::
* Function Index::
* Variable Index::
* Keybinding Index::

 -- The Detailed Node Listing --

Queries

* Query Compiler::              Compiling Emacs Lisp to TicketSQL.
* Query Language::              A description of the Sexp-based language.

Ticket Browser

* Ticket Browser Display::      How tickets are displayed in the browser.
* Ticket Browser Sorting::      How tickets are sorted in the browser.
* Ticket Browser Filtering::    How to filter tickets out of the browser.
* Multiple Ticket Browsers::    More than one ticket browser buffer.



File: rt-liberation.info,  Node: Introduction,  Next: Installation,  Up: Top

1 Introduction
**************

rt-liberation is a GNU/Emacs package for working with the Request
Tracker (henceforth abbreviated as just "RT") software from Best
Practical Solutions.  RT has an interactive Web interface, a command
line interface (the "RT CLI"), and a REST interface.  rt-liberation uses
the RT REST interface to communicate with the RT server.

   rt-liberation allows sending search queries to the RT server,
browsing the resulting tickets, viewing the tickets' contents and
performing operations on the tickets.


File: rt-liberation.info,  Node: Installation,  Next: Queries,  Prev: Introduction,  Up: Top

2 Installation
**************

rt-liberation is available via GNU ELPA.

   If you install rt-liberation manually instead you'll need to tell
Emacs where to find it, and tell Emacs to load the package:

     (add-to-list 'load-path "/PATH/TO/rt-liberation/")

     (require 'rt-liberation)

   rt-liberation needs to be configured in your ~/.emacs, an ~/.rt-liber
file, or similar.

   Tell rt-liberation where to find the RT server's REST interface:

     (setq rt-liber-rest-url "rt.example.org")

   rt-liberation can issue a command to "take" a ticket (that is, assign
it to yourself).  For this the variable RT-LIBER-USERNAME must be set:

     (setq rt-liber-username "someuser")

   rt-liberation can also launch a Web browser to visit a ticket.  For
that to work the base URL needs to be set in RT-LIBER-BASE-URL.  For
example:

   (setq rt-liber-base-url "https://rt.foo.org/")


File: rt-liberation.info,  Node: Queries,  Next: Ticket Browser,  Prev: Installation,  Up: Top

3 Queries
*********

A typical RT server is meant to manage a large amount of tickets.  Much
more that would be convenient to view all at once.  Instead queries are
used to view only a subset of the tickets on the server.

   rt-liberation has its own Sexp-based query language which maps to
RT's TicketSQL language.

* Menu:

* Query Compiler::              Compiling Emacs Lisp to TicketSQL.
* Query Language::              A description of the Sexp-based language.


File: rt-liberation.info,  Node: Query Compiler,  Next: Query Language,  Up: Queries

3.1 Query Compiler
==================

In order to browse and view tickets a list of needs to be requested from
the RT server.  Typically the tickets answer some kind of criteria, for
example "tickets no older than a week owned by me which have \"foobar\"
in their subject line".  In RT these criteria are formulated with
"TicketSQL" queries; a structured query language specific to RT.

   rt-liberation provides a query compiler function to compile Emacs
Lisp symbolic expressions into TicketSQL. The query compiler supports a
number of TicketSQL tokens.


File: rt-liberation.info,  Node: Query Language,  Prev: Query Compiler,  Up: Queries

3.2 Query Language
==================

rt-liberation's Sexp-based query language covers a portion of the
TicketSQL language.  Here are some of the supported TicketSQL tokens:
Boolean tokens as a means of combining query subsections: "and", "or",
"not".  LIKE attribute tokens: "subject", "content".

   For example here is a query with both Boolean and LIKE tokens:

     (rt-liber-compile-query
         (and (queue "bugs")
              (content "gnu")))

     ==> "Queue = 'bugs' AND Content LIKE 'gnu'"

   We can also express negation (note that the compiler produces "!="
and "NOT LIKE" for negation depending on the context):

     (rt-liber-compile-query
      (and (queue "bugs")
           (not (owner "Nobody"))
           (not (content "sprigz"))
           (status "new")))

     ==> "Queue = 'licensing' AND Owner != 'Nobody' \
         AND Content NOT LIKE 'sprigz' AND Status = 'new'"

   Attribute tokens which match an attribute to a specific field such
as: "owner", "status" and "queue".  Temporal tokens which limit the
search results to tickets within a certain time interval: "created" and
"lastupdated".  Note that temporal keywords such as "created" always
accept two arguments: BEFORE and AFTER. When either BEFORE or AFTER
aren't needed, use NIL instead.

   One of the advantages of being able to express the TicketSQL queries
as Emacs Lisp is to be able to express queries using Emacs Lisp
functions.

   Here is a slightly more involved example to illustrate:

     (rt-liber-compile-query
      (and (queue "bugs")
           (owner "me@myaddress.com")
           (status "open")
           (lastupdated nil
                        (format-time-string
                          "%Y-%m-%d"
                          (seconds-to-time
                           (- (time-to-seconds (current-time))
                              (* 60 60 24 7)))))))

     ==> "Queue = 'bugs' AND Owner = 'me@myaddress.com' AND Status = 'open' AND LastUpdated > '2009-03-30'"

   Here is an example of how the ticket browser and compiler can be used
in function calls:

     (defun rt-liber-display-ticket (ticket-id)
       "Display ticket with TICKET-ID in the ticket-browser."
       (interactive "MTicket ID: ")
       (rt-liber-browse-query
        (rt-liber-compile-query
         (and (queue "complaints")
              (id ticket-id)))))


File: rt-liberation.info,  Node: Ticket Browser,  Next: Ticket Viewer,  Prev: Queries,  Up: Top

4 Ticket Browser
****************

The ticket browser is a special buffer which provides a convenient
interface to the results of a server query.  The ticket browser can be
started by invoking: (rt-liber-browse-query QUERY), where QUERY is a
TicketSQL query.  The TicketSQL query can be entered manually as a
string or as the return value of the query compiler.

 -- Function: rt-liber-browse-query QUERY &optional NEW
     Runs QUERY against the server and launches the browser.

     If NEW is non-nil then the query results will be displayed in a new
     buffer, otherwise the query results will override the contents of
     the existing ticket browser buffer.  If NEW is a string then that
     will be the name of the new buffer.

   The TicketSQL query can be the return value of the query compiler.
For example:

     (rt-liber-browse-query
      (rt-liber-compile-query
          (and (queue "bugs")
               (content "gnu")))

   Since the return value of the query compiler is just a TicketSQL
string, the following is equivalent:

     (rt-liber-browse-query "Queue = 'bugs' AND Content LIKE 'gnu'")

   The ticket browser defines a number of commands:

'q'
     Bury the ticket browser buffer.

'n'
     Move point to the next ticket.

'p'
     Move point to the previous ticket.

'RET'
     Visit the ticket at point in the *Note Ticket Viewer::.

'g'
     Refresh the contents of the browser buffer.

'G'
     Refresh the contents of the browser buffer.  Return point to the
     current ticket after the refresh (if possible).

's'
     Mark the ticket as spam.

'S'
     Delete marked tickets as spam (requires rt-liberation-multi
     package).

'a'
     Assign the ticket to a user.

'r'
     Mark the ticket as "resolved".

'o'
     Mark the ticket as "open".

't'
     Assign the ticket at point to RT-LIBER-USERNAME.

'SPC'
     Scroll the text of the ticket browser upward.

'DEL'
     Scroll the text of the ticket browser downward.

'm'
     Move the ticket to a different queue.

'P'
     Set the numerical priority level of the ticket at point.

* Menu:

* Ticket Browser Display::      How tickets are displayed in the browser.
* Ticket Browser Sorting::      How tickets are sorted in the browser.
* Ticket Browser Filtering::    How to filter tickets out of the browser.
* Multiple Ticket Browsers::    More than one ticket browser buffer.


File: rt-liberation.info,  Node: Ticket Browser Display,  Next: Ticket Browser Sorting,  Up: Ticket Browser

4.1 Ticket Browser Display
==========================

The ticket browser displays the tickets in the browser by calling
"rt-liber-ticketlist-browser-redraw-f" which can be changed and
customized.  Any implementation of
"rt-liber-ticketlist-browser-redraw-f" must leave point at the end of
the ticket text.

   The ticket data itself can be displayed using rt-liberation ticket
format string %-sequences:

%i
     ID number of the ticket in the RT database.
%s
     Subject line.
%c
     Ticket creation time.  The format to display the time is specified
     in the variable RT-LIBER-BROWSER-TIME-FORMAT-STRING.
%S
     Ticket status ("open", "new" etc.)
%r
     Whether the ticket is resolved.
%R
     Requestor/s
%C
     Creator of the ticket.
%o
     Owner of the ticket.
%q
     The queue originating the ticket.
%p
     The numerical priority of the ticket

   Here is an example implementation of
"rt-liber-ticketlist-browser-redraw-f" showing the use of the
%-sequences.  Note the use of text properties to add color to ticket
text.  The use of text properties as opposed to font-locking is meant to
ease customization because otherwise any change in ticket display would
break the font-locking regular expressions.

     (defun rt-liber-ticketlist-browser-redraw-f (ticket)
       "Display TICKET."
       (insert (rt-liber-format "[%c] %i" ticket))
       (add-text-properties (point-at-bol)
                            (point-at-eol)
                            '(face rt-liber-ticket-face))
       (newline)
       (insert (rt-liber-format "    [%S] %s" ticket))
       (newline)
       (insert (rt-liber-format "    %o <== %R" ticket)))

   The function "rt-liber-high-priority-p" can be used to apply a
different face or text to a ticket if it is high priority.  A ticket is
considered high priority if its value is strictly higher than
RT-LIBER-BROWSER-PRIORITY-CUTOFF


File: rt-liberation.info,  Node: Ticket Browser Sorting,  Next: Ticket Browser Filtering,  Prev: Ticket Browser Display,  Up: Ticket Browser

4.2 Ticket Browser Sorting
==========================

The tickets in the browser are displayed by default in reverse
chronological order.  Ticket sorting is done by a call to
"rt-liber-browser-default-sorting-function".

   Other sorting orders can be used by binding
"rt-liber-browser-default-sorting-function" to a different function.  To
ease writing such functions rt-liberation provides two predicate
functions to perform comparisons between ticket objects:

 -- Function: rt-liber-lex-lessthan-p a b field
     Return true if A is lexicographically less than B in FIELD.

     Here is an example of sorting tickets lexicographically by owner
     name using "rt-liber-lex-lessthan-p" (note that you can feed
     "rt-liber-lex-lessthan-p" a date/time string and it will sort it
     just fine except that it wouldn't make any sense):

          (defun rt-liber-sort-by-owner (ticket-list)
            "Sort TICKET-LIST lexicographically by owner."
            (rt-liber-sort-ticket-list
             ticket-list
             #'(lambda (a b)
                 (rt-liber-lex-lessthan-p a b "Owner"))))

 -- Function: rt-liber-time-lessthan-p a b field
     Return t if A is chronologically less than B in FIELD.

     Here is an example of sorting tickets lexicographically by owner
     name using "rt-liber-time-lessthan-p" (note that feeding
     "rt-liber-time-lessthan-p" anything but a date/time string, in this
     case "Created" contains a date, will result in an error being
     signaled).

          (defun rt-liber-sort-by-time-created (ticket-list)
            "Sort TICKET-LIST in reverse chronological order."
            (reverse
             (rt-liber-sort-ticket-list
              ticket-list
              #'(lambda (a b)
                  (rt-liber-time-lessthan-p a b "Created")))))


File: rt-liberation.info,  Node: Ticket Browser Filtering,  Next: Multiple Ticket Browsers,  Prev: Ticket Browser Sorting,  Up: Ticket Browser

4.3 Ticket Browser Filtering
============================

The Ticket Browser can also filter out (that is, not display) certain
tickets based on particular criteria.  This probably shouldn't be used
instead of a properly formed RT query, but when used in conjunction with
correctly formulated queries it becomes a powerful tool.

   During ticket display processing the Ticket Browser will call the
function pointed to by RT-LIBER-BROWSER-DEFAULT-FILTER-FUNCTION on each
ticket, passing the function the ticket alist as a single argument.  The
function is set by default to "rt-liber-default-filter-f", which is a
function which will display all tickets and filter none.

   If any tickets are filtered, the Ticket Browser will display the
filtered ticket count at the bottom ticket listing.

   Here is a simple example of how to filter out all of the tickets
which have a status of "deleted".

   First we define a custom filter function.  Note how it accepts a
single argument, which is the ticket alist, and returns nil if the
ticket is to be filtered.

     (defun rt-liber-browser-deleted-filter (ticket)
       (not
        (and ticket
             (string= (cdr (assoc "Status" ticket))
                      "deleted"))))

   Then we assign that function to be our default filtering function:

     (setq rt-liber-browser-default-filter-function
           'rt-liber-browser-deleted-filter)


File: rt-liberation.info,  Node: Multiple Ticket Browsers,  Prev: Ticket Browser Filtering,  Up: Ticket Browser

4.4 Multiple Ticket Browsers
============================

It is sometimes useful to rename the ticket browser buffer to something
more informative than the default RT-LIBER-BROWSER-BUFFER-NAME,
especially if there are multiple ticket browsers.

   Changing a ticket browser's name can be done normally with
'rename-buffer', but it is also possible to name the ticket browser when
it is created.  In the following example two ticket browser buffers will
be created displaying the query results and named "*updated by
supervisor*" and "*new tickets*" respectively:

     (defun rt-liber-daily-rounds ()
       (interactive)

       (rt-liber-browse-query
        (rt-liber-compile-query
         (and (queue "complaints")
              (owner "lem.e.tweakit")
              (status "open")
              (lastupdatedby "molly.manager")))
        "*updated by supervisor*")

       (rt-liber-browse-query
        (rt-liber-compile-query
         (and (queue "complaints")
              (owner "Nobody")
              (status "new")))
        "*new tickets*"))


File: rt-liberation.info,  Node: Ticket Viewer,  Next: Gnus Integration,  Prev: Ticket Browser,  Up: Top

5 Ticket Viewer
***************

The ticket viewer is an interface for viewing the contents of a ticket.
It provides font-locking to make reading the contents easier via
RT-LIBER-VIEWER-FONT-LOCK-KEYWORDS and a number of key-bindings.

   The ticket viewer provides key-bindings to help compose emails to
send to the RT email interface.  The key-bindings for composing email
described below are generic, what actually happens when you invoke them
depends on the email-backend system you have installed into
rt-liberation.  'rt-liberation-gnus.el' provides integration with Gnus,
*Note Gnus Integration::.

   Setting RT-LIBER-JUMP-TO-LATEST to 't' will cause the viewer to
automatically scroll to the latest comment in a ticket when that ticket
is visited.  By default RT-LIBER-JUMP-TO-LATEST is set to 'nil'.

   When in the ticket viewer buffer, invoking
"rt-liber-viewer-take-ticket" will "take" the ticket.

'q'
     Bury the ticket viewer buffer.

'n'
     Move point to the next section in ticket.

'N'
     Move point to the newest correspondence section, if any.

'p'
     Move point to the previous section in ticket.

'V'
     Visit the current ticket in a Web browser.

'm'
     Compose an answer to the current ticket.

'M'
     Compose an answer to the current ticket.  The content section
     around point will be inserted into the email body and commented
     out.

't'
     Compose a provisional answer to the current ticket.

'T'
     Compose a provisional answer to the current ticket.  The content
     section around point will be inserted into the email body and
     commented out.

'F'
     Compose an answer to the current ticket.  The content section
     around point will be inserted into the email body verbatim.

'c'
     Compose a comment for the current ticket.

'C'
     Comment on the ticket using the current context

'g'
     Refresh and redisplay the current ticket.

'SPC'
     Scroll text of ticket viewer upward.

'DEL'
     Scroll text of ticket viewer downward.

'h'
     Display the associated ticket in the ticket browser.


File: rt-liberation.info,  Node: Gnus Integration,  Next: Tracking Updates,  Prev: Ticket Viewer,  Up: Top

6 Gnus Integration
******************

The file 'rt-liberation-gnus.el' implements integration with Gnus for
composing emails.  To enable the feature, 'require' it after loading
rt-liberation:

     (require 'rt-liberation-gnus)

   In order for rt-liberation-gnus to be useful a few variables need to
be specialized.  The following is example code which sets these
variables.  Below is a thorough description of those variables.

     (setq rt-liber-gnus-comment-address "our-rtserver-comment@ourserver.org"
           rt-liber-gnus-address         "our-rtserver@ourserver.org"
           rt-liber-gnus-subject-name    "ourserver.org")

 -- User Option: rt-liber-gnus-address
     RT-LIBER-GNUS-ADDRESS is the email address which is configured in
     the RT server email interface for sending a response to the
     ticket's requestor.
 -- User Option: rt-liber-gnus-comment-address
     RT-LIBER-GNUS-COMMENT-ADDRESS is the email address which is
     configured in the RT server email interface for adding a comment
     under the ticket in question.
 -- User Option: rt-liber-gnus-subject-name
     RT-LIBER-GNUS-SUBJECT-NAME is a string, typically included at the
     beginning of the square brackets in the subject.  The string is a
     part of the subject line which helps the RT server recognize the
     email.

   Gnus posting styles controlled by GNUS-POSTING-STYLES can be
customized for rt-liberation-gnus by using the variable RT-LIBER-GNUS-P,
which is only non-nil when rt-liberation-gnus launches a Gnus message
buffer.

   Here is example code which uses RT-LIBER-GNUS-P to override the
signature in the default posting style with one special to
rt-liberation.  Headers can be added and removed in a similar manner.

     (setq gnus-posting-styles
             '((".*"
                (name "Lemm E. Hackitt")
                (address "Lemm@hack.it")
                (signature-file "~/sig.txt")
                ("X-Ethics" "Use GNU"))
               (rt-liber-gnus-p
                (signature-file "~/rt-liber-sig.txt"))))

   Once rt-liberation-gnus is loaded and customized the key-bindings in
the Viewer will be able to call into it, *Note Ticket Viewer::.


File: rt-liberation.info,  Node: Tracking Updates,  Next: Batch Operations,  Prev: Gnus Integration,  Up: Top

7 Tracking Updates
******************

The functions in 'rt-liberation-update.el' help keep up with updates to
the ticket database.  To enable the feature, 'require' it after loading
rt-liberation:

     (require 'rt-liberation-update)

   Then set RT-LIBER-UPDATE-DEFAULT-QUEUE to be the name of the queue to
watch for updates.  For example:

     (setq rt-liber-update-default-queue "complaints")

 -- Function: rt-liber-update &optional no-update
     'rt-liber-update' is an interactive function which runs a query
     against the RT server asking for the tickets which have been
     updated since the time 'rt-liber-update' was last run (each time it
     runs, it leaves a time-stamp).  If no time-stamp is found, for
     instance when you run 'rt-liber-update' for the first time, today's
     date is used.

     With the NO-UPDATE prefix, 'rt-liber-update' will not update the
     time-stamp so that the next invocation will produce the same
     result.


File: rt-liberation.info,  Node: Batch Operations,  Next: Local Storage,  Prev: Tracking Updates,  Up: Top

8 Batch Operations
******************

The extension 'rt-liberation-multi.el' implements performing batch
operations on groups of tickets.  It works in two stages: First mark an
arbitrary number of tickets within the same buffer then call a batch
operation function on them.  The batch operation functions work the same
way as function which work on single tickets only that they iterate
through all of the marked tickets.

   To enable batch operations first load 'rt-liberation-multi.el':

     (require 'rt-liberation-storage)

'M'
     Mark the ticket at point for future action.  If the ticket at point
     is already marked then unmark it.

 -- Function: rt-liber-multi-set-status-open
     Set the status of all the marked tickets to "open".

 -- Function: rt-liber-multi-set-status-resolved
     Set the status of all the marked tickets to "resolved.

 -- Function: rt-liber-multi-assign name
     Assign all of the marked tickets to NAME.

 -- Function: rt-liber-multi-flag-as-spam-and-delete
     Set the status of all the marked tickets to "is-spam" and delete.


File: rt-liberation.info,  Node: Local Storage,  Next: Copying,  Prev: Batch Operations,  Up: Top

9 Local Storage
***************

'rt-liberation-storage.el' implements associating arbitrary ancillary
data with tickets.  The data is stored locally and is not sent to the RT
server.

   To enable local storage first load 'rt-liberation-storage.el':

     (require 'rt-liberation-storage)

   Then enable the display of ancillary data with:

     (setq rt-liber-anc-p t)

   The associated data is edited and displayed in the ticket browser
with the following command key:

'A'
     Associate text with the ticket at point.  You will be prompted to
     enter a string of text.

   Once text is associated with a ticket it will be displayed alongside
that ticket in the ticket browser.  This particular feature lends itself
to creating private annotations about tickets.

   The implementation distributed with rt-liberation allows associating
text with tickets but is not limited to text.  The same implementation
can be extended to associate any arbitrary data with any ticket.


File: rt-liberation.info,  Node: Copying,  Next: The GNU FDL,  Prev: Local Storage,  Up: Top

10 The GNU General Public License.
**********************************

                        Version 3, 29 June 2007

     Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>

     Everyone is permitted to copy and distribute verbatim copies of this
     license document, but changing it is not allowed.

Preamble
========

The GNU General Public License is a free, copyleft license for software
and other kinds of works.

   The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.  We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors.  You can apply it to
your programs, too.

   When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.

   To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights.  Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.

   For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received.  You must make sure that they, too, receive
or can get the source code.  And you must show them these terms so they
know their rights.

   Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.

   For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software.  For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.

   Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so.  This is fundamentally incompatible with the aim of
protecting users' freedom to change the software.  The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable.  Therefore, we
have designed this version of the GPL to prohibit the practice for those
products.  If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.

   Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary.  To prevent this, the GPL assures that
patents cannot be used to render the program non-free.

   The precise terms and conditions for copying, distribution and
modification follow.

TERMS AND CONDITIONS
====================

  0. Definitions.

     "This License" refers to version 3 of the GNU General Public
     License.

     "Copyright" also means copyright-like laws that apply to other
     kinds of works, such as semiconductor masks.

     "The Program" refers to any copyrightable work licensed under this
     License.  Each licensee is addressed as "you".  "Licensees" and
     "recipients" may be individuals or organizations.

     To "modify" a work means to copy from or adapt all or part of the
     work in a fashion requiring copyright permission, other than the
     making of an exact copy.  The resulting work is called a "modified
     version" of the earlier work or a work "based on" the earlier work.

     A "covered work" means either the unmodified Program or a work
     based on the Program.

     To "propagate" a work means to do anything with it that, without
     permission, would make you directly or secondarily liable for
     infringement under applicable copyright law, except executing it on
     a computer or modifying a private copy.  Propagation includes
     copying, distribution (with or without modification), making
     available to the public, and in some countries other activities as
     well.

     To "convey" a work means any kind of propagation that enables other
     parties to make or receive copies.  Mere interaction with a user
     through a computer network, with no transfer of a copy, is not
     conveying.

     An interactive user interface displays "Appropriate Legal Notices"
     to the extent that it includes a convenient and prominently visible
     feature that (1) displays an appropriate copyright notice, and (2)
     tells the user that there is no warranty for the work (except to
     the extent that warranties are provided), that licensees may convey
     the work under this License, and how to view a copy of this
     License.  If the interface presents a list of user commands or
     options, such as a menu, a prominent item in the list meets this
     criterion.

  1. Source Code.

     The "source code" for a work means the preferred form of the work
     for making modifications to it.  "Object code" means any non-source
     form of a work.

     A "Standard Interface" means an interface that either is an
     official standard defined by a recognized standards body, or, in
     the case of interfaces specified for a particular programming
     language, one that is widely used among developers working in that
     language.

     The "System Libraries" of an executable work include anything,
     other than the work as a whole, that (a) is included in the normal
     form of packaging a Major Component, but which is not part of that
     Major Component, and (b) serves only to enable use of the work with
     that Major Component, or to implement a Standard Interface for
     which an implementation is available to the public in source code
     form.  A "Major Component", in this context, means a major
     essential component (kernel, window system, and so on) of the
     specific operating system (if any) on which the executable work
     runs, or a compiler used to produce the work, or an object code
     interpreter used to run it.

     The "Corresponding Source" for a work in object code form means all
     the source code needed to generate, install, and (for an executable
     work) run the object code and to modify the work, including scripts
     to control those activities.  However, it does not include the
     work's System Libraries, or general-purpose tools or generally
     available free programs which are used unmodified in performing
     those activities but which are not part of the work.  For example,
     Corresponding Source includes interface definition files associated
     with source files for the work, and the source code for shared
     libraries and dynamically linked subprograms that the work is
     specifically designed to require, such as by intimate data
     communication or control flow between those subprograms and other
     parts of the work.

     The Corresponding Source need not include anything that users can
     regenerate automatically from other parts of the Corresponding
     Source.

     The Corresponding Source for a work in source code form is that
     same work.

  2. Basic Permissions.

     All rights granted under this License are granted for the term of
     copyright on the Program, and are irrevocable provided the stated
     conditions are met.  This License explicitly affirms your unlimited
     permission to run the unmodified Program.  The output from running
     a covered work is covered by this License only if the output, given
     its content, constitutes a covered work.  This License acknowledges
     your rights of fair use or other equivalent, as provided by
     copyright law.

     You may make, run and propagate covered works that you do not
     convey, without conditions so long as your license otherwise
     remains in force.  You may convey covered works to others for the
     sole purpose of having them make modifications exclusively for you,
     or provide you with facilities for running those works, provided
     that you comply with the terms of this License in conveying all
     material for which you do not control copyright.  Those thus making
     or running the covered works for you must do so exclusively on your
     behalf, under your direction and control, on terms that prohibit
     them from making any copies of your copyrighted material outside
     their relationship with you.

     Conveying under any other circumstances is permitted solely under
     the conditions stated below.  Sublicensing is not allowed; section
     10 makes it unnecessary.

  3. Protecting Users' Legal Rights From Anti-Circumvention Law.

     No covered work shall be deemed part of an effective technological
     measure under any applicable law fulfilling obligations under
     article 11 of the WIPO copyright treaty adopted on 20 December
     1996, or similar laws prohibiting or restricting circumvention of
     such measures.

     When you convey a covered work, you waive any legal power to forbid
     circumvention of technological measures to the extent such
     circumvention is effected by exercising rights under this License
     with respect to the covered work, and you disclaim any intention to
     limit operation or modification of the work as a means of
     enforcing, against the work's users, your or third parties' legal
     rights to forbid circumvention of technological measures.

  4. Conveying Verbatim Copies.

     You may convey verbatim copies of the Program's source code as you
     receive it, in any medium, provided that you conspicuously and
     appropriately publish on each copy an appropriate copyright notice;
     keep intact all notices stating that this License and any
     non-permissive terms added in accord with section 7 apply to the
     code; keep intact all notices of the absence of any warranty; and
     give all recipients a copy of this License along with the Program.

     You may charge any price or no price for each copy that you convey,
     and you may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

     You may convey a work based on the Program, or the modifications to
     produce it from the Program, in the form of source code under the
     terms of section 4, provided that you also meet all of these
     conditions:

       a. The work must carry prominent notices stating that you
          modified it, and giving a relevant date.

       b. The work must carry prominent notices stating that it is
          released under this License and any conditions added under
          section 7.  This requirement modifies the requirement in
          section 4 to "keep intact all notices".

       c. You must license the entire work, as a whole, under this
          License to anyone who comes into possession of a copy.  This
          License will therefore apply, along with any applicable
          section 7 additional terms, to the whole of the work, and all
          its parts, regardless of how they are packaged.  This License
          gives no permission to license the work in any other way, but
          it does not invalidate such permission if you have separately
          received it.

       d. If the work has interactive user interfaces, each must display
          Appropriate Legal Notices; however, if the Program has
          interactive interfaces that do not display Appropriate Legal
          Notices, your work need not make them do so.

     A compilation of a covered work with other separate and independent
     works, which are not by their nature extensions of the covered
     work, and which are not combined with it such as to form a larger
     program, in or on a volume of a storage or distribution medium, is
     called an "aggregate" if the compilation and its resulting
     copyright are not used to limit the access or legal rights of the
     compilation's users beyond what the individual works permit.
     Inclusion of a covered work in an aggregate does not cause this
     License to apply to the other parts of the aggregate.

  6. Conveying Non-Source Forms.

     You may convey a covered work in object code form under the terms
     of sections 4 and 5, provided that you also convey the
     machine-readable Corresponding Source under the terms of this
     License, in one of these ways:

       a. Convey the object code in, or embodied in, a physical product
          (including a physical distribution medium), accompanied by the
          Corresponding Source fixed on a durable physical medium
          customarily used for software interchange.

       b. Convey the object code in, or embodied in, a physical product
          (including a physical distribution medium), accompanied by a
          written offer, valid for at least three years and valid for as
          long as you offer spare parts or customer support for that
          product model, to give anyone who possesses the object code
          either (1) a copy of the Corresponding Source for all the
          software in the product that is covered by this License, on a
          durable physical medium customarily used for software
          interchange, for a price no more than your reasonable cost of
          physically performing this conveying of source, or (2) access
          to copy the Corresponding Source from a network server at no
          charge.

       c. Convey individual copies of the object code with a copy of the
          written offer to provide the Corresponding Source.  This
          alternative is allowed only occasionally and noncommercially,
          and only if you received the object code with such an offer,
          in accord with subsection 6b.

       d. Convey the object code by offering access from a designated
          place (gratis or for a charge), and offer equivalent access to
          the Corresponding Source in the same way through the same
          place at no further charge.  You need not require recipients
          to copy the Corresponding Source along with the object code.
          If the place to copy the object code is a network server, the
          Corresponding Source may be on a different server (operated by
          you or a third party) that supports equivalent copying
          facilities, provided you maintain clear directions next to the
          object code saying where to find the Corresponding Source.
          Regardless of what server hosts the Corresponding Source, you
          remain obligated to ensure that it is available for as long as
          needed to satisfy these requirements.

       e. Convey the object code using peer-to-peer transmission,
          provided you inform other peers where the object code and
          Corresponding Source of the work are being offered to the
          general public at no charge under subsection 6d.

     A separable portion of the object code, whose source code is
     excluded from the Corresponding Source as a System Library, need
     not be included in conveying the object code work.

     A "User Product" is either (1) a "consumer product", which means
     any tangible personal property which is normally used for personal,
     family, or household purposes, or (2) anything designed or sold for
     incorporation into a dwelling.  In determining whether a product is
     a consumer product, doubtful cases shall be resolved in favor of
     coverage.  For a particular product received by a particular user,
     "normally used" refers to a typical or common use of that class of
     product, regardless of the status of the particular user or of the
     way in which the particular user actually uses, or expects or is
     expected to use, the product.  A product is a consumer product
     regardless of whether the product has substantial commercial,
     industrial or non-consumer uses, unless such uses represent the
     only significant mode of use of the product.

     "Installation Information" for a User Product means any methods,
     procedures, authorization keys, or other information required to
     install and execute modified versions of a covered work in that
     User Product from a modified version of its Corresponding Source.
     The information must suffice to ensure that the continued
     functioning of the modified object code is in no case prevented or
     interfered with solely because modification has been made.

     If you convey an object code work under this section in, or with,
     or specifically for use in, a User Product, and the conveying
     occurs as part of a transaction in which the right of possession
     and use of the User Product is transferred to the recipient in
     perpetuity or for a fixed term (regardless of how the transaction
     is characterized), the Corresponding Source conveyed under this
     section must be accompanied by the Installation Information.  But
     this requirement does not apply if neither you nor any third party
     retains the ability to install modified object code on the User
     Product (for example, the work has been installed in ROM).

     The requirement to provide Installation Information does not
     include a requirement to continue to provide support service,
     warranty, or updates for a work that has been modified or installed
     by the recipient, or for the User Product in which it has been
     modified or installed.  Access to a network may be denied when the
     modification itself materially and adversely affects the operation
     of the network or violates the rules and protocols for
     communication across the network.

     Corresponding Source conveyed, and Installation Information
     provided, in accord with this section must be in a format that is
     publicly documented (and with an implementation available to the
     public in source code form), and must require no special password
     or key for unpacking, reading or copying.

  7. Additional Terms.

     "Additional permissions" are terms that supplement the terms of
     this License by making exceptions from one or more of its
     conditions.  Additional permissions that are applicable to the
     entire Program shall be treated as though they were included in
     this License, to the extent that they are valid under applicable
     law.  If additional permissions apply only to part of the Program,
     that part may be used separately under those permissions, but the
     entire Program remains governed by this License without regard to
     the additional permissions.

     When you convey a copy of a covered work, you may at your option
     remove any additional permissions from that copy, or from any part
     of it.  (Additional permissions may be written to require their own
     removal in certain cases when you modify the work.)  You may place
     additional permissions on material, added by you to a covered work,
     for which you have or can give appropriate copyright permission.

     Notwithstanding any other provision of this License, for material
     you add to a covered work, you may (if authorized by the copyright
     holders of that material) supplement the terms of this License with
     terms:

       a. Disclaiming warranty or limiting liability differently from
          the terms of sections 15 and 16 of this License; or

       b. Requiring preservation of specified reasonable legal notices
          or author attributions in that material or in the Appropriate
          Legal Notices displayed by works containing it; or

       c. Prohibiting misrepresentation of the origin of that material,
          or requiring that modified versions of such material be marked
          in reasonable ways as different from the original version; or

       d. Limiting the use for publicity purposes of names of licensors
          or authors of the material; or

       e. Declining to grant rights under trademark law for use of some
          trade names, trademarks, or service marks; or

       f. Requiring indemnification of licensors and authors of that
          material by anyone who conveys the material (or modified
          versions of it) with contractual assumptions of liability to
          the recipient, for any liability that these contractual
          assumptions directly impose on those licensors and authors.

     All other non-permissive additional terms are considered "further
     restrictions" within the meaning of section 10.  If the Program as
     you received it, or any part of it, contains a notice stating that
     it is governed by this License along with a term that is a further
     restriction, you may remove that term.  If a license document
     contains a further restriction but permits relicensing or conveying
     under this License, you may add to a covered work material governed
     by the terms of that license document, provided that the further
     restriction does not survive such relicensing or conveying.

     If you add terms to a covered work in accord with this section, you
     must place, in the relevant source files, a statement of the
     additional terms that apply to those files, or a notice indicating
     where to find the applicable terms.

     Additional terms, permissive or non-permissive, may be stated in
     the form of a separately written license, or stated as exceptions;
     the above requirements apply either way.

  8. Termination.

     You may not propagate or modify a covered work except as expressly
     provided under this License.  Any attempt otherwise to propagate or
     modify it is void, and will automatically terminate your rights
     under this License (including any patent licenses granted under the
     third paragraph of section 11).

     However, if you cease all violation of this License, then your
     license from a particular copyright holder is reinstated (a)
     provisionally, unless and until the copyright holder explicitly and
     finally terminates your license, and (b) permanently, if the
     copyright holder fails to notify you of the violation by some
     reasonable means prior to 60 days after the cessation.

     Moreover, your license from a particular copyright holder is
     reinstated permanently if the copyright holder notifies you of the
     violation by some reasonable means, this is the first time you have
     received notice of violation of this License (for any work) from
     that copyright holder, and you cure the violation prior to 30 days
     after your receipt of the notice.

     Termination of your rights under this section does not terminate
     the licenses of parties who have received copies or rights from you
     under this License.  If your rights have been terminated and not
     permanently reinstated, you do not qualify to receive new licenses
     for the same material under section 10.

  9. Acceptance Not Required for Having Copies.

     You are not required to accept this License in order to receive or
     run a copy of the Program.  Ancillary propagation of a covered work
     occurring solely as a consequence of using peer-to-peer
     transmission to receive a copy likewise does not require
     acceptance.  However, nothing other than this License grants you
     permission to propagate or modify any covered work.  These actions
     infringe copyright if you do not accept this License.  Therefore,
     by modifying or propagating a covered work, you indicate your
     acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

     Each time you convey a covered work, the recipient automatically
     receives a license from the original licensors, to run, modify and
     propagate that work, subject to this License.  You are not
     responsible for enforcing compliance by third parties with this
     License.

     An "entity transaction" is a transaction transferring control of an
     organization, or substantially all assets of one, or subdividing an
     organization, or merging organizations.  If propagation of a
     covered work results from an entity transaction, each party to that
     transaction who receives a copy of the work also receives whatever
     licenses to the work the party's predecessor in interest had or
     could give under the previous paragraph, plus a right to possession
     of the Corresponding Source of the work from the predecessor in
     interest, if the predecessor has it or can get it with reasonable
     efforts.

     You may not impose any further restrictions on the exercise of the
     rights granted or affirmed under this License.  For example, you
     may not impose a license fee, royalty, or other charge for exercise
     of rights granted under this License, and you may not initiate
     litigation (including a cross-claim or counterclaim in a lawsuit)
     alleging that any patent claim is infringed by making, using,
     selling, offering for sale, or importing the Program or any portion
     of it.

  11. Patents.

     A "contributor" is a copyright holder who authorizes use under this
     License of the Program or a work on which the Program is based.
     The work thus licensed is called the contributor's "contributor
     version".

     A contributor's "essential patent claims" are all patent claims
     owned or controlled by the contributor, whether already acquired or
     hereafter acquired, that would be infringed by some manner,
     permitted by this License, of making, using, or selling its
     contributor version, but do not include claims that would be
     infringed only as a consequence of further modification of the
     contributor version.  For purposes of this definition, "control"
     includes the right to grant patent sublicenses in a manner
     consistent with the requirements of this License.

     Each contributor grants you a non-exclusive, worldwide,
     royalty-free patent license under the contributor's essential
     patent claims, to make, use, sell, offer for sale, import and
     otherwise run, modify and propagate the contents of its contributor
     version.

     In the following three paragraphs, a "patent license" is any
     express agreement or commitment, however denominated, not to
     enforce a patent (such as an express permission to practice a
     patent or covenant not to sue for patent infringement).  To "grant"
     such a patent license to a party means to make such an agreement or
     commitment not to enforce a patent against the party.

     If you convey a covered work, knowingly relying on a patent
     license, and the Corresponding Source of the work is not available
     for anyone to copy, free of charge and under the terms of this
     License, through a publicly available network server or other
     readily accessible means, then you must either (1) cause the
     Corresponding Source to be so available, or (2) arrange to deprive
     yourself of the benefit of the patent license for this particular
     work, or (3) arrange, in a manner consistent with the requirements
     of this License, to extend the patent license to downstream
     recipients.  "Knowingly relying" means you have actual knowledge
     that, but for the patent license, your conveying the covered work
     in a country, or your recipient's use of the covered work in a
     country, would infringe one or more identifiable patents in that
     country that you have reason to believe are valid.

     If, pursuant to or in connection with a single transaction or
     arrangement, you convey, or propagate by procuring conveyance of, a
     covered work, and grant a patent license to some of the parties
     receiving the covered work authorizing them to use, propagate,
     modify or convey a specific copy of the covered work, then the
     patent license you grant is automatically extended to all
     recipients of the covered work and works based on it.

     A patent license is "discriminatory" if it does not include within
     the scope of its coverage, prohibits the exercise of, or is
     conditioned on the non-exercise of one or more of the rights that
     are specifically granted under this License.  You may not convey a
     covered work if you are a party to an arrangement with a third
     party that is in the business of distributing software, under which
     you make payment to the third party based on the extent of your
     activity of conveying the work, and under which the third party
     grants, to any of the parties who would receive the covered work
     from you, a discriminatory patent license (a) in connection with
     copies of the covered work conveyed by you (or copies made from
     those copies), or (b) primarily for and in connection with specific
     products or compilations that contain the covered work, unless you
     entered into that arrangement, or that patent license was granted,
     prior to 28 March 2007.

     Nothing in this License shall be construed as excluding or limiting
     any implied license or other defenses to infringement that may
     otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

     If conditions are imposed on you (whether by court order, agreement
     or otherwise) that contradict the conditions of this License, they
     do not excuse you from the conditions of this License.  If you
     cannot convey a covered work so as to satisfy simultaneously your
     obligations under this License and any other pertinent obligations,
     then as a consequence you may not convey it at all.  For example,
     if you agree to terms that obligate you to collect a royalty for
     further conveying from those to whom you convey the Program, the
     only way you could satisfy both those terms and this License would
     be to refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

     Notwithstanding any other provision of this License, you have
     permission to link or combine any covered work with a work licensed
     under version 3 of the GNU Affero General Public License into a
     single combined work, and to convey the resulting work.  The terms
     of this License will continue to apply to the part which is the
     covered work, but the special requirements of the GNU Affero
     General Public License, section 13, concerning interaction through
     a network will apply to the combination as such.

  14. Revised Versions of this License.

     The Free Software Foundation may publish revised and/or new
     versions of the GNU General Public License from time to time.  Such
     new versions will be similar in spirit to the present version, but
     may differ in detail to address new problems or concerns.

     Each version is given a distinguishing version number.  If the
     Program specifies that a certain numbered version of the GNU
     General Public License "or any later version" applies to it, you
     have the option of following the terms and conditions either of
     that numbered version or of any later version published by the Free
     Software Foundation.  If the Program does not specify a version
     number of the GNU General Public License, you may choose any
     version ever published by the Free Software Foundation.

     If the Program specifies that a proxy can decide which future
     versions of the GNU General Public License can be used, that
     proxy's public statement of acceptance of a version permanently
     authorizes you to choose that version for the Program.

     Later license versions may give you additional or different
     permissions.  However, no additional obligations are imposed on any
     author or copyright holder as a result of your choosing to follow a
     later version.

  15. Disclaimer of Warranty.

     THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
     APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE
     COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
     WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE
     RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
     SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
     NECESSARY SERVICING, REPAIR OR CORRECTION.

  16. Limitation of Liability.

     IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
     WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
     AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
     DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
     CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
     THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA
     BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
     PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
     PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF
     THE POSSIBILITY OF SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

     If the disclaimer of warranty and limitation of liability provided
     above cannot be given local legal effect according to their terms,
     reviewing courts shall apply local law that most closely
     approximates an absolute waiver of all civil liability in
     connection with the Program, unless a warranty or assumption of
     liability accompanies a copy of the Program in return for a fee.

END OF TERMS AND CONDITIONS
===========================

How to Apply These Terms to Your New Programs
=============================================

If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.

   To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.

     ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
     Copyright (C) YEAR NAME OF AUTHOR

     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or (at
     your option) any later version.

     This program is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.

   Also add information on how to contact you by electronic and paper
mail.

   If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

     PROGRAM Copyright (C) YEAR NAME OF AUTHOR
     This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type 'show c' for details.

   The hypothetical commands 'show w' and 'show c' should show the
appropriate parts of the General Public License.  Of course, your
program's commands might be different; for a GUI interface, you would
use an "about box".

   You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary.  For more information on this, and how to apply and follow
the GNU GPL, see <https://www.gnu.org/licenses/>.

   The GNU General Public License does not permit incorporating your
program into proprietary programs.  If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library.  If this is what you want to do, use the
GNU Lesser General Public License instead of this License.  But first,
please read <https://www.gnu.org/licenses/why-not-lgpl.html>.


File: rt-liberation.info,  Node: The GNU FDL,  Next: Concept Index,  Prev: Copying,  Up: Top

11 GNU Free Documentation License
*********************************

                      Version 1.2, November 2002

     Copyright (C) 2000,2001,2002 Free Software Foundation, Inc.
     51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA

     Everyone is permitted to copy and distribute verbatim copies
     of this license document, but changing it is not allowed.

  0. PREAMBLE

     The purpose of this License is to make a manual, textbook, or other
     functional and useful document "free" in the sense of freedom: to
     assure everyone the effective freedom to copy and redistribute it,
     with or without modifying it, either commercially or
     noncommercially.  Secondarily, this License preserves for the
     author and publisher a way to get credit for their work, while not
     being considered responsible for modifications made by others.

     This License is a kind of "copyleft", which means that derivative
     works of the document must themselves be free in the same sense.
     It complements the GNU General Public License, which is a copyleft
     license designed for free software.

     We have designed this License in order to use it for manuals for
     free software, because free software needs free documentation: a
     free program should come with manuals providing the same freedoms
     that the software does.  But this License is not limited to
     software manuals; it can be used for any textual work, regardless
     of subject matter or whether it is published as a printed book.  We
     recommend this License principally for works whose purpose is
     instruction or reference.

  1. APPLICABILITY AND DEFINITIONS

     This License applies to any manual or other work, in any medium,
     that contains a notice placed by the copyright holder saying it can
     be distributed under the terms of this License.  Such a notice
     grants a world-wide, royalty-free license, unlimited in duration,
     to use that work under the conditions stated herein.  The
     "Document", below, refers to any such manual or work.  Any member
     of the public is a licensee, and is addressed as "you".  You accept
     the license if you copy, modify or distribute the work in a way
     requiring permission under copyright law.

     A "Modified Version" of the Document means any work containing the
     Document or a portion of it, either copied verbatim, or with
     modifications and/or translated into another language.

     A "Secondary Section" is a named appendix or a front-matter section
     of the Document that deals exclusively with the relationship of the
     publishers or authors of the Document to the Document's overall
     subject (or to related matters) and contains nothing that could
     fall directly within that overall subject.  (Thus, if the Document
     is in part a textbook of mathematics, a Secondary Section may not
     explain any mathematics.)  The relationship could be a matter of
     historical connection with the subject or with related matters, or
     of legal, commercial, philosophical, ethical or political position
     regarding them.

     The "Invariant Sections" are certain Secondary Sections whose
     titles are designated, as being those of Invariant Sections, in the
     notice that says that the Document is released under this License.
     If a section does not fit the above definition of Secondary then it
     is not allowed to be designated as Invariant.  The Document may
     contain zero Invariant Sections.  If the Document does not identify
     any Invariant Sections then there are none.

     The "Cover Texts" are certain short passages of text that are
     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
     that says that the Document is released under this License.  A
     Front-Cover Text may be at most 5 words, and a Back-Cover Text may
     be at most 25 words.

     A "Transparent" copy of the Document means a machine-readable copy,
     represented in a format whose specification is available to the
     general public, that is suitable for revising the document
     straightforwardly with generic text editors or (for images composed
     of pixels) generic paint programs or (for drawings) some widely
     available drawing editor, and that is suitable for input to text
     formatters or for automatic translation to a variety of formats
     suitable for input to text formatters.  A copy made in an otherwise
     Transparent file format whose markup, or absence of markup, has
     been arranged to thwart or discourage subsequent modification by
     readers is not Transparent.  An image format is not Transparent if
     used for any substantial amount of text.  A copy that is not
     "Transparent" is called "Opaque".

     Examples of suitable formats for Transparent copies include plain
     ASCII without markup, Texinfo input format, LaTeX input format,
     SGML or XML using a publicly available DTD, and standard-conforming
     simple HTML, PostScript or PDF designed for human modification.
     Examples of transparent image formats include PNG, XCF and JPG.
     Opaque formats include proprietary formats that can be read and
     edited only by proprietary word processors, SGML or XML for which
     the DTD and/or processing tools are not generally available, and
     the machine-generated HTML, PostScript or PDF produced by some word
     processors for output purposes only.

     The "Title Page" means, for a printed book, the title page itself,
     plus such following pages as are needed to hold, legibly, the
     material this License requires to appear in the title page.  For
     works in formats which do not have any title page as such, "Title
     Page" means the text near the most prominent appearance of the
     work's title, preceding the beginning of the body of the text.

     A section "Entitled XYZ" means a named subunit of the Document
     whose title either is precisely XYZ or contains XYZ in parentheses
     following text that translates XYZ in another language.  (Here XYZ
     stands for a specific section name mentioned below, such as
     "Acknowledgements", "Dedications", "Endorsements", or "History".)
     To "Preserve the Title" of such a section when you modify the
     Document means that it remains a section "Entitled XYZ" according
     to this definition.

     The Document may include Warranty Disclaimers next to the notice
     which states that this License applies to the Document.  These
     Warranty Disclaimers are considered to be included by reference in
     this License, but only as regards disclaiming warranties: any other
     implication that these Warranty Disclaimers may have is void and
     has no effect on the meaning of this License.

  2. VERBATIM COPYING

     You may copy and distribute the Document in any medium, either
     commercially or noncommercially, provided that this License, the
     copyright notices, and the license notice saying this License
     applies to the Document are reproduced in all copies, and that you
     add no other conditions whatsoever to those of this License.  You
     may not use technical measures to obstruct or control the reading
     or further copying of the copies you make or distribute.  However,
     you may accept compensation in exchange for copies.  If you
     distribute a large enough number of copies you must also follow the
     conditions in section 3.

     You may also lend copies, under the same conditions stated above,
     and you may publicly display copies.

  3. COPYING IN QUANTITY

     If you publish printed copies (or copies in media that commonly
     have printed covers) of the Document, numbering more than 100, and
     the Document's license notice requires Cover Texts, you must
     enclose the copies in covers that carry, clearly and legibly, all
     these Cover Texts: Front-Cover Texts on the front cover, and
     Back-Cover Texts on the back cover.  Both covers must also clearly
     and legibly identify you as the publisher of these copies.  The
     front cover must present the full title with all words of the title
     equally prominent and visible.  You may add other material on the
     covers in addition.  Copying with changes limited to the covers, as
     long as they preserve the title of the Document and satisfy these
     conditions, can be treated as verbatim copying in other respects.

     If the required texts for either cover are too voluminous to fit
     legibly, you should put the first ones listed (as many as fit
     reasonably) on the actual cover, and continue the rest onto
     adjacent pages.

     If you publish or distribute Opaque copies of the Document
     numbering more than 100, you must either include a machine-readable
     Transparent copy along with each Opaque copy, or state in or with
     each Opaque copy a computer-network location from which the general
     network-using public has access to download using public-standard
     network protocols a complete Transparent copy of the Document, free
     of added material.  If you use the latter option, you must take
     reasonably prudent steps, when you begin distribution of Opaque
     copies in quantity, to ensure that this Transparent copy will
     remain thus accessible at the stated location until at least one
     year after the last time you distribute an Opaque copy (directly or
     through your agents or retailers) of that edition to the public.

     It is requested, but not required, that you contact the authors of
     the Document well before redistributing any large number of copies,
     to give them a chance to provide you with an updated version of the
     Document.

  4. MODIFICATIONS

     You may copy and distribute a Modified Version of the Document
     under the conditions of sections 2 and 3 above, provided that you
     release the Modified Version under precisely this License, with the
     Modified Version filling the role of the Document, thus licensing
     distribution and modification of the Modified Version to whoever
     possesses a copy of it.  In addition, you must do these things in
     the Modified Version:

       A. Use in the Title Page (and on the covers, if any) a title
          distinct from that of the Document, and from those of previous
          versions (which should, if there were any, be listed in the
          History section of the Document).  You may use the same title
          as a previous version if the original publisher of that
          version gives permission.

       B. List on the Title Page, as authors, one or more persons or
          entities responsible for authorship of the modifications in
          the Modified Version, together with at least five of the
          principal authors of the Document (all of its principal
          authors, if it has fewer than five), unless they release you
          from this requirement.

       C. State on the Title page the name of the publisher of the
          Modified Version, as the publisher.

       D. Preserve all the copyright notices of the Document.

       E. Add an appropriate copyright notice for your modifications
          adjacent to the other copyright notices.

       F. Include, immediately after the copyright notices, a license
          notice giving the public permission to use the Modified
          Version under the terms of this License, in the form shown in
          the Addendum below.

       G. Preserve in that license notice the full lists of Invariant
          Sections and required Cover Texts given in the Document's
          license notice.

       H. Include an unaltered copy of this License.

       I. Preserve the section Entitled "History", Preserve its Title,
          and add to it an item stating at least the title, year, new
          authors, and publisher of the Modified Version as given on the
          Title Page.  If there is no section Entitled "History" in the
          Document, create one stating the title, year, authors, and
          publisher of the Document as given on its Title Page, then add
          an item describing the Modified Version as stated in the
          previous sentence.

       J. Preserve the network location, if any, given in the Document
          for public access to a Transparent copy of the Document, and
          likewise the network locations given in the Document for
          previous versions it was based on.  These may be placed in the
          "History" section.  You may omit a network location for a work
          that was published at least four years before the Document
          itself, or if the original publisher of the version it refers
          to gives permission.

       K. For any section Entitled "Acknowledgements" or "Dedications",
          Preserve the Title of the section, and preserve in the section
          all the substance and tone of each of the contributor
          acknowledgements and/or dedications given therein.

       L. Preserve all the Invariant Sections of the Document, unaltered
          in their text and in their titles.  Section numbers or the
          equivalent are not considered part of the section titles.

       M. Delete any section Entitled "Endorsements".  Such a section
          may not be included in the Modified Version.

       N. Do not retitle any existing section to be Entitled
          "Endorsements" or to conflict in title with any Invariant
          Section.

       O. Preserve any Warranty Disclaimers.

     If the Modified Version includes new front-matter sections or
     appendices that qualify as Secondary Sections and contain no
     material copied from the Document, you may at your option designate
     some or all of these sections as invariant.  To do this, add their
     titles to the list of Invariant Sections in the Modified Version's
     license notice.  These titles must be distinct from any other
     section titles.

     You may add a section Entitled "Endorsements", provided it contains
     nothing but endorsements of your Modified Version by various
     parties--for example, statements of peer review or that the text
     has been approved by an organization as the authoritative
     definition of a standard.

     You may add a passage of up to five words as a Front-Cover Text,
     and a passage of up to 25 words as a Back-Cover Text, to the end of
     the list of Cover Texts in the Modified Version.  Only one passage
     of Front-Cover Text and one of Back-Cover Text may be added by (or
     through arrangements made by) any one entity.  If the Document
     already includes a cover text for the same cover, previously added
     by you or by arrangement made by the same entity you are acting on
     behalf of, you may not add another; but you may replace the old
     one, on explicit permission from the previous publisher that added
     the old one.

     The author(s) and publisher(s) of the Document do not by this
     License give permission to use their names for publicity for or to
     assert or imply endorsement of any Modified Version.

  5. COMBINING DOCUMENTS

     You may combine the Document with other documents released under
     this License, under the terms defined in section 4 above for
     modified versions, provided that you include in the combination all
     of the Invariant Sections of all of the original documents,
     unmodified, and list them all as Invariant Sections of your
     combined work in its license notice, and that you preserve all
     their Warranty Disclaimers.

     The combined work need only contain one copy of this License, and
     multiple identical Invariant Sections may be replaced with a single
     copy.  If there are multiple Invariant Sections with the same name
     but different contents, make the title of each such section unique
     by adding at the end of it, in parentheses, the name of the
     original author or publisher of that section if known, or else a
     unique number.  Make the same adjustment to the section titles in
     the list of Invariant Sections in the license notice of the
     combined work.

     In the combination, you must combine any sections Entitled
     "History" in the various original documents, forming one section
     Entitled "History"; likewise combine any sections Entitled
     "Acknowledgements", and any sections Entitled "Dedications".  You
     must delete all sections Entitled "Endorsements."

  6. COLLECTIONS OF DOCUMENTS

     You may make a collection consisting of the Document and other
     documents released under this License, and replace the individual
     copies of this License in the various documents with a single copy
     that is included in the collection, provided that you follow the
     rules of this License for verbatim copying of each of the documents
     in all other respects.

     You may extract a single document from such a collection, and
     distribute it individually under this License, provided you insert
     a copy of this License into the extracted document, and follow this
     License in all other respects regarding verbatim copying of that
     document.

  7. AGGREGATION WITH INDEPENDENT WORKS

     A compilation of the Document or its derivatives with other
     separate and independent documents or works, in or on a volume of a
     storage or distribution medium, is called an "aggregate" if the
     copyright resulting from the compilation is not used to limit the
     legal rights of the compilation's users beyond what the individual
     works permit.  When the Document is included in an aggregate, this
     License does not apply to the other works in the aggregate which
     are not themselves derivative works of the Document.

     If the Cover Text requirement of section 3 is applicable to these
     copies of the Document, then if the Document is less than one half
     of the entire aggregate, the Document's Cover Texts may be placed
     on covers that bracket the Document within the aggregate, or the
     electronic equivalent of covers if the Document is in electronic
     form.  Otherwise they must appear on printed covers that bracket
     the whole aggregate.

  8. TRANSLATION

     Translation is considered a kind of modification, so you may
     distribute translations of the Document under the terms of section
     4.  Replacing Invariant Sections with translations requires special
     permission from their copyright holders, but you may include
     translations of some or all Invariant Sections in addition to the
     original versions of these Invariant Sections.  You may include a
     translation of this License, and all the license notices in the
     Document, and any Warranty Disclaimers, provided that you also
     include the original English version of this License and the
     original versions of those notices and disclaimers.  In case of a
     disagreement between the translation and the original version of
     this License or a notice or disclaimer, the original version will
     prevail.

     If a section in the Document is Entitled "Acknowledgements",
     "Dedications", or "History", the requirement (section 4) to
     Preserve its Title (section 1) will typically require changing the
     actual title.

  9. TERMINATION

     You may not copy, modify, sublicense, or distribute the Document
     except as expressly provided for under this License.  Any other
     attempt to copy, modify, sublicense or distribute the Document is
     void, and will automatically terminate your rights under this
     License.  However, parties who have received copies, or rights,
     from you under this License will not have their licenses terminated
     so long as such parties remain in full compliance.

  10. FUTURE REVISIONS OF THIS LICENSE

     The Free Software Foundation may publish new, revised versions of
     the GNU Free Documentation License from time to time.  Such new
     versions will be similar in spirit to the present version, but may
     differ in detail to address new problems or concerns.  See
     <http://www.gnu.org/copyleft/>.

     Each version of the License is given a distinguishing version
     number.  If the Document specifies that a particular numbered
     version of this License "or any later version" applies to it, you
     have the option of following the terms and conditions either of
     that specified version or of any later version that has been
     published (not as a draft) by the Free Software Foundation.  If the
     Document does not specify a version number of this License, you may
     choose any version ever published (not as a draft) by the Free
     Software Foundation.

11.1 ADDENDUM: How to use this License for your documents
=========================================================

To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and license
notices just after the title page:

       Copyright (C)  YEAR  YOUR NAME.
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License, Version 1.2
       or any later version published by the Free Software Foundation;
       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
       Texts.  A copy of the license is included in the section entitled ``GNU
       Free Documentation License''.

   If you have Invariant Sections, Front-Cover Texts and Back-Cover
Texts, replace the "with...Texts."  line with this:

         with the Invariant Sections being LIST THEIR TITLES, with
         the Front-Cover Texts being LIST, and with the Back-Cover Texts
         being LIST.

   If you have Invariant Sections without Cover Texts, or some other
combination of the three, merge those two alternatives to suit the
situation.

   If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of free
software license, such as the GNU General Public License, to permit
their use in free software.


File: rt-liberation.info,  Node: Concept Index,  Next: Function Index,  Prev: The GNU FDL,  Up: Top

Concept Index
*************

[index]
* Menu:

* Batch Operations:                      Batch Operations.      (line 6)
* FDL, GNU Free Documentation License:   The GNU FDL.           (line 6)
* Gnus Integration:                      Gnus Integration.      (line 6)
* installation:                          Installation.          (line 6)
* introduction:                          Introduction.          (line 6)
* Local Storage:                         Local Storage.         (line 6)
* queries:                               Queries.               (line 6)
* query compiler:                        Query Compiler.        (line 6)
* query language:                        Query Language.        (line 6)
* ticket browser:                        Ticket Browser.        (line 6)
* ticket browser display function:       Ticket Browser Display.
                                                                (line 6)
* ticket browser filtering filter:       Ticket Browser Filtering.
                                                                (line 6)
* ticket browser multiple buffer:        Multiple Ticket Browsers.
                                                                (line 6)
* ticket browser sorting:                Ticket Browser Sorting.
                                                                (line 6)
* ticket viewer:                         Ticket Viewer.         (line 6)
* Tracking Updates:                      Tracking Updates.      (line 6)


File: rt-liberation.info,  Node: Function Index,  Next: Variable Index,  Prev: Concept Index,  Up: Top

Function Index
**************

[index]
* Menu:

* revert-buffer:                         Ticket Browser.       (line 48)
* revert-buffer <1>:                     Ticket Viewer.        (line 66)
* rt-liber-browse-query:                 Ticket Browser.       (line 12)
* rt-liber-browser-ancillary-text:       Local Storage.        (line 22)
* rt-liber-browser-assign:               Ticket Browser.       (line 62)
* rt-liber-browser-mark-as-spam:         Ticket Browser.       (line 55)
* rt-liber-browser-mode-quit:            Ticket Browser.       (line 36)
* rt-liber-browser-move:                 Ticket Browser.       (line 80)
* rt-liber-browser-open:                 Ticket Browser.       (line 68)
* rt-liber-browser-prioritize:           Ticket Browser.       (line 83)
* rt-liber-browser-refresh-and-return:   Ticket Browser.       (line 51)
* rt-liber-browser-resolve:              Ticket Browser.       (line 65)
* rt-liber-browser-take-ticket-at-point: Ticket Browser.       (line 71)
* rt-liber-display-ticket-at-point:      Ticket Browser.       (line 45)
* rt-liber-jump-to-latest-correspondence: Ticket Viewer.       (line 31)
* rt-liber-lex-lessthan-p:               Ticket Browser Sorting.
                                                               (line 15)
* rt-liber-mark-ticket-at-point:         Batch Operations.     (line 18)
* rt-liber-multi-assign:                 Batch Operations.     (line 27)
* rt-liber-multi-delete-spam:            Ticket Browser.       (line 58)
* rt-liber-multi-flag-as-spam-and-delete: Batch Operations.    (line 30)
* rt-liber-multi-set-status-open:        Batch Operations.     (line 21)
* rt-liber-multi-set-status-resolved:    Batch Operations.     (line 24)
* rt-liber-next-section-in-viewer:       Ticket Viewer.        (line 28)
* rt-liber-next-ticket-in-browser:       Ticket Browser.       (line 39)
* rt-liber-previous-section-in-viewer:   Ticket Viewer.        (line 34)
* rt-liber-previous-ticket-in-browser:   Ticket Browser.       (line 42)
* rt-liber-time-lessthan-p:              Ticket Browser Sorting.
                                                               (line 30)
* rt-liber-update:                       Tracking Updates.     (line 17)
* rt-liber-viewer-answer:                Ticket Viewer.        (line 40)
* rt-liber-viewer-answer-provisionally:  Ticket Viewer.        (line 48)
* rt-liber-viewer-answer-provisionally-this: Ticket Viewer.    (line 51)
* rt-liber-viewer-answer-this:           Ticket Viewer.        (line 43)
* rt-liber-viewer-answer-verbatim-this:  Ticket Viewer.        (line 56)
* rt-liber-viewer-comment:               Ticket Viewer.        (line 60)
* rt-liber-viewer-comment-this:          Ticket Viewer.        (line 63)
* rt-liber-viewer-mode-quit:             Ticket Viewer.        (line 25)
* rt-liber-viewer-show-ticket-browser:   Ticket Viewer.        (line 75)
* rt-liber-viewer-visit-in-browser:      Ticket Viewer.        (line 37)
* scroll-down:                           Ticket Browser.       (line 77)
* scroll-down <1>:                       Ticket Viewer.        (line 72)
* scroll-up:                             Ticket Browser.       (line 74)
* scroll-up <1>:                         Ticket Viewer.        (line 69)


File: rt-liberation.info,  Node: Variable Index,  Next: Keybinding Index,  Prev: Function Index,  Up: Top

Variable Index
**************

[index]
* Menu:

* rt-liber-gnus-address:                 Gnus Integration.     (line 20)
* rt-liber-gnus-comment-address:         Gnus Integration.     (line 24)
* rt-liber-gnus-subject-name:            Gnus Integration.     (line 28)


File: rt-liberation.info,  Node: Keybinding Index,  Prev: Variable Index,  Up: Top

Keybinding Index
****************

[index]
* Menu:

* a (ticket browser):                    Ticket Browser.       (line 62)
* A (ticket browser):                    Local Storage.        (line 22)
* c (ticket viewer):                     Ticket Viewer.        (line 60)
* C (ticket viewer):                     Ticket Viewer.        (line 63)
* DEL (ticket browser):                  Ticket Browser.       (line 77)
* DEL (ticket viewer):                   Ticket Viewer.        (line 72)
* F (ticket viewer):                     Ticket Viewer.        (line 56)
* g (ticket browser):                    Ticket Browser.       (line 48)
* G (ticket browser):                    Ticket Browser.       (line 51)
* g (ticket viewer):                     Ticket Viewer.        (line 66)
* h (ticket viewer):                     Ticket Viewer.        (line 75)
* m (ticket browser):                    Ticket Browser.       (line 80)
* M (ticket browser):                    Batch Operations.     (line 18)
* m (ticket viewer):                     Ticket Viewer.        (line 40)
* M (ticket viewer):                     Ticket Viewer.        (line 43)
* n (ticket browser):                    Ticket Browser.       (line 39)
* n (ticket viewer):                     Ticket Viewer.        (line 28)
* N (ticket viewer):                     Ticket Viewer.        (line 31)
* o (ticket browser):                    Ticket Browser.       (line 68)
* p (ticket browser):                    Ticket Browser.       (line 42)
* P (ticket browser):                    Ticket Browser.       (line 83)
* p (ticket viewer):                     Ticket Viewer.        (line 34)
* q (ticket browser):                    Ticket Browser.       (line 36)
* q (ticket viewer):                     Ticket Viewer.        (line 25)
* r (ticket browser):                    Ticket Browser.       (line 65)
* RET (ticket browser):                  Ticket Browser.       (line 45)
* s (ticket browser):                    Ticket Browser.       (line 55)
* S (ticket browser):                    Ticket Browser.       (line 58)
* SPC (ticket browser):                  Ticket Browser.       (line 74)
* SPC (ticket viewer):                   Ticket Viewer.        (line 69)
* t (ticket browser):                    Ticket Browser.       (line 71)
* t (ticket viewer):                     Ticket Viewer.        (line 48)
* t (ticket viewer) <1>:                 Ticket Viewer.        (line 51)
* V (ticket viewer):                     Ticket Viewer.        (line 37)



Tag Table:
Node: Top698
Node: Introduction2979
Node: Installation3591
Node: Queries4575
Node: Query Compiler5142
Node: Query Language5788
Node: Ticket Browser8232
Node: Ticket Browser Display10709
Node: Ticket Browser Sorting12705
Node: Ticket Browser Filtering14660
Node: Multiple Ticket Browsers16208
Node: Ticket Viewer17382
Node: Gnus Integration19559
Node: Tracking Updates21852
Node: Batch Operations22934
Node: Local Storage24119
Node: Copying25202
Node: The GNU FDL62756
Node: Concept Index85153
Node: Function Index86739
Node: Variable Index90094
Node: Keybinding Index90475

End Tag Table