(?:`)?(?:the`latex`project`public`license`=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-`lppl`version`1\.2`1999\-09\-03)?(?:`)?(?:`)?(?:.{,5000})(?:`)?everyone`is`allowed`to`distribute`verbatim`copies`of`this`license`document,`but`modification`of`it`is`not`allowed\.`preamble`========`the`latex`project`public`license`\(lppl\)`is`the`license`under`which`the`base`latex`distribution`is`distributed\.`you`may`use`this`license`for`any`program`that`you`have`written`and`wish`to`distribute\.`this`license`may`be`particularly`suitable`if`your`program`is`tex\-`related`\(such`as`a`latex`package\),`but`you`may`use`it`even`if`your`program`is`unrelated`to`tex\.`the`section`whether`and`how`to`distribute`programs`under`this`license`,`below,`gives`instructions,`examples,`and`recommendations`for`authors`who`are`considering`distributing`their`programs`under`this`license\.`in`this`license`document,`the`program`refers`to`any`program`distributed`under`this`license\.`this`license`gives`conditions`under`which`the`program`may`be`distributed`and`conditions`under`which`modified`versions`of`the`program`may`be`distributed\.`individual`files`of`the`program`may`bear`supplementary`and`or`superseding`conditions`on`modification`of`themselves`and`on`the`distribution`of`modified`versions`of`themselves,`but`\*no\*`file`of`the`program`may`bear`supplementary`or`superseding`conditions`on`the`distribution`of`an`unmodified`copy`of`the`file\.`a`distributor`wishing`to`distribute`a`complete,`unmodified`copy`of`the`program`therefore`needs`to`check`the`conditions`only`in`this`license`and`nowhere`else\.`activities`other`than`distribution`and`or`modification`of`the`program`are`not`covered`by`this`license;`they`are`outside`its`scope\.`in`particular,`the`act`of`running`the`program`is`not`restricted\.`we,`the`latex3`project,`believe`that`the`conditions`below`give`you`the`freedom`to`make`and`distribute`modified`versions`of`the`program`that`conform`with`whatever`technical`specifications`you`wish`while`maintaining`the`availability,`integrity,`and`reliability`of`the`program\.`if`you`do`not`see`how`to`achieve`your`goal`while`meeting`these`conditions,`then`read`the`document`cfgguide\.`tex`in`the`base`latex`distribution`for`suggestions\.`conditions`on`distribution`and`modification`===========================================`you`may`distribute`a`complete,`unmodified`copy`of`the`program\.`distribution`of`only`part`of`the`program`is`not`allowed\.`you`may`not`modify`in`any`way`a`file`of`the`program`that`bears`a`legal`notice`forbidding`modification`of`that`file\.`you`may`distribute`a`modified`file`of`the`program`if,`and`only`if,`the`following`eight`conditions`are`met:(?:`)?(?:.{,20})(?:`)?you`must`meet`any`additional`conditions`borne`by`the`file`on`the`distribution`of`a`modified`version`of`the`file`as`described`below`in`the`subsection`additional`conditions`on`individual`files`of`the`program`\.(?:`)?(?:.{,20})(?:`)?if`the`file`is`a`latex`software`file,`then`you`must`meet`any`applicable`additional`conditions`on`the`distribution`of`a`modified`version`of`the`file`that`are`described`below`in`the`subsection`additional`conditions`on`latex`software`files`\.(?:`)?(?:.{,20})(?:`)?you`must`not`distribute`the`modified`file`with`the`filename`of`the`original`file\.(?:`)?(?:.{,20})(?:`)?in`the`modified`file,`you`must`acknowledge`the`authorship`and`name`of`the`original`file,`and`the`name`\(if`any\)`of`the`program`which`contains`it\.(?:`)?(?:.{,20})(?:`)?you`must`change`any`identification`string`in`the`file`to`indicate`clearly`that`the`modified`file`is`not`part`of`the`program\.(?:`)?(?:.{,20})(?:`)?you`must`change`any`addresses`in`the`modified`file`for`the`reporting`of`errors`in`the`file`or`in`the`program`generally`to`ensure`that`reports`for`files`no`longer`maintained`by`the`original`maintainers`will`be`directed`to`the`maintainers`of`the`modified`files\.(?:`)?(?:.{,20})(?:`)?you`must`distribute`the`modified`file`under`a`license`that`forbids`distribution`both`of`the`modified`file`and`of`any`files`derived`from`the`modified`file`with`the`filename`of`the`original`file\.(?:`)?(?:.{,20})(?:`)?you`must`do`either`\(a\)`or`\(b\):(?:`)?(?:.{,20})(?:`)?distribute`a`copy`of`the`program`\(that`is,`a`complete,`unmodified`copy`of`the`program\)`together`with`the`modified`file;`if`your`distribution`of`the`modified`file`is`made`by`offering`access`to`copy`the`modified`file`from`a`designated`place,`then`offering`equivalent`access`to`copy`the`program`from`the`same`place`meets`this`condition,`even`though`third`parties`are`not`compelled`to`copy`the`program`along`with`the`modified`file;(?:`)?(?:.{,20})(?:`)?provide`to`those`who`receive`the`modified`file`information`that`is`sufficient`for`them`to`obtain`a`copy`of`the`program;`for`example,`you`may`provide`a`uniform`resource`locator`\(url\)`for`a`site`that`you`expect`will`provide`them`with`a`copy`of`the`program`free`of`charge`\(either`the`version`from`which`your`modification`is`derived,`or`perhaps`a`later`version\)\.`note`that`in`the`above,`distribution`of`a`file`means`making`the`file`available`to`others`by`any`means\.`this`includes,`for`instance,`installing`the`file`on`any`machine`in`such`a`way`that`the`file`is`accessible`by`users`other`than`yourself\.`modification`of`a`file`means`any`procedure`that`produces`a`derivative`file`under`any`applicable`law`\-`that`is,`a`file`containing`the`original`file`or`a`significant`portion`of`it,`either`verbatim`or`with`modifications`and`or`translated`into`another`language\.`changing`the`name`of`a`file`\(other`than`as`necessitated`by`the`file`conventions`of`the`target`file`systems\)`is`considered`to`be`a`modification`of`the`file\.`the`distribution`conditions`in`this`license`do`not`have`to`be`applied`to`files`that`have`been`modified`in`accordance`with`the`above`conditions\.`note,`however,`that`condition`7\.`does`apply`to`any`such`modified`file\.`the`conditions`above`are`not`intended`to`prohibit,`and`hence`do`not`apply`to,`the`updating,`by`any`method,`of`a`file`so`that`it`becomes`identical`to`the`latest`version`of`that`file`of`the`program\.`a`recommendation`on`modification`without`distribution`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`it`is`wise`never`to`modify`a`file`of`the`program,`even`for`your`own`personal`use,`without`also`meeting`the`above`eight`conditions`for`distributing`the`modified`file\.`while`you`might`intend`that`such`modified`files`will`never`be`distributed,`often`this`will`happen`by`accident`\-`you`may`forget`that`you`have`modified`the`file;`or`it`may`not`occur`to`you`when`allowing`others`to`access`the`modified`file`that`you`are`thus`distributing`it`and`violating`the`conditions`of`this`license\.`it`is`usually`in`your`best`interest`to`keep`your`copy`of`the`program`identical`with`the`public`one\.`many`programs`provide`ways`to`control`the`behavior`of`that`program`without`altering`its`licensed`files\.`additional`conditions`on`individual`files`of`the`program`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`an`individual`file`of`the`program`may`bear`additional`conditions`that`supplement`and`or`supersede`the`conditions`in`this`license`if,`and`only`if,`such`additional`conditions`exclusively`concern`modification`of`the`file`or`distribution`of`a`modified`version`of`the`file\.`the`conditions`on`individual`files`of`the`program`therefore`may`differ`only`with`respect`to`the`kind`and`extent`of`modification`of`those`files`that`is`allowed,`and`with`respect`to`the`distribution`of`modified`versions`of`those`files\.`additional`conditions`on`latex`software`files`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`if`a`file`of`the`program`is`intended`to`be`used`with`latex`\(that`is,`if`it`is`a`latex`software`file\),`then`the`following`additional`conditions,`which`supplement`and`or`supersede`the`conditions`above,`apply`to`the`file`according`to`its`filename`extension:(?:`)?(?:.{,20})(?:`)?you`may`not`modify`any`file`with`filename`extension`\.`ins`since`these`are`installation`files`containing`the`legal`notices`that`are`placed`in`the`files`they`generate\.(?:`)?(?:.{,20})(?:`)?you`may`distribute`modified`versions`of`files`with`filename`extension`\.`fd`\(latex`font`definition`files\)`under`the`standard`conditions`of`the`lppl`as`described`above\.`you`may`also`distribute`such`modified`latex`font`definition`files`with`their`original`names`provided`that:(?:`)?(?:.{,20})(?:`)?the`only`changes`to`the`original`files`either`enable`use`of`available`fonts`or`prevent`attempts`to`access`unavailable`fonts;(?:`)?(?:.{,20})(?:`)?you`also`distribute`the`original,`unmodified`files`\(tex`input`paths`can`be`used`to`control`which`set`of`latex`font`definition`files`is`actually`used`by`tex\)\.(?:`)?(?:.{,20})(?:`)?`you`may`distribute`modified`versions`of`files`with`filename`extension`\.`cfg`\(configuration`files\)`with`their`original`names\.`the`program`may`\(and`usually`will\)`specify`the`range`of`commands`that`are`allowed`in`a`particular`configuration`file\.`because`of`portability`and`exchangeability`issues`in`latex`software,`the`latex3`project`deprecates`the`distribution`of`modified`versions`of`components`of`latex`or`of`generally`available`contributed`code`for`them,`but`such`distribution`can`meet`the`conditions`of`this`license\.`no`warranty`===========`there`is`no`warranty`for`the`program\.`except`when`otherwise`stated`in`writing,`the`copyright`holder`provides`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\.`in`no`event`unless`agreed`to`in`writing`will`the`copyright`holder,`or`any`author`named`in`the`files`of`the`program,`or`any`other`party`who`may`distribute`and`or`modify`the`program`as`permitted`above,`be`liable`to`you`for`damages,`including`any`general,`special,`incidental`or`consequential`damages`arising`out`of`any`use`of`the`program`or`out`of`inability`to`use`the`program`\(including,`but`not`limited`to,`loss`of`data,`data`being`rendered`inaccurate,`or`losses`sustained`by`anyone`as`a`result`of`any`failure`of`the`program`to`operate`with`any`other`programs\),`even`if`the`copyright`holder`or`said`author`or`said`other`party`has`been`advised`of`the`possibility`of`such`damages\.`whether`and`how`to`distribute`programs`under`this`license`=========================================================`this`section`contains`important`instructions,`examples,`and`recommendations`for`authors`who`are`considering`distributing`their`programs`under`this`license\.`these`authors`are`addressed`as`you`in`this`section\.`choosing`this`license`or`another`license`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`if`for`any`part`of`your`program`you`want`or`need`to`use`\*distribution\*`conditions`that`differ`from`those`in`this`license,`then`do`not`refer`to`this`license`anywhere`in`your`program`but`instead`distribute`your`program`under`a`different`license\.`you`may`use`the`text`of`this`license`as`a`model`for`your`own`license,`but`your`license`should`not`refer`to`the`lppl`or`otherwise`give`the`impression`that`your`program`is`distributed`under`the`lppl\.`the`document`modguide\.`tex`in`the`base`latex`distribution`explains`the`motivation`behind`the`conditions`of`this`license\.`it`explains,`for`example,`why`distributing`latex`under`the`gnu`general`public`license`\(gpl\)`was`considered`inappropriate\.`even`if`your`program`is`unrelated`to`latex,`the`discussion`in`modguide\.`tex`may`still`be`relevant,`and`authors`intending`to`distribute`their`programs`under`any`license`are`encouraged`to`read`it\.`how`to`use`this`license`\-\-\-\-\-\-\-\-\-\-\-\-`to`use`this`license,`place`in`each`of`the`files`of`your`program`both`an`explicit`copyright`notice`including`your`name`and`the`year`and`also`a`statement`that`the`distribution`and`or`modification`of`the`file`is`constrained`by`the`conditions`in`this`license\.`here`is`an`example`of`such`a`notice`and`statement:(?:`)?(?:%%)?(?:`)?(?:`)?(?:.+)(?:`)?(?:`)?(?:%%)?(?:`)?copyright(?:`)?(?:.+)(?:`)?(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?this`program`may`be`distributed`and`or`modified`under`the(?:`)?(?:%)?(?:`)?conditions`of`the`latex`project`public`license,`either`version`1\.2(?:`)?(?:%)?(?:`)?of`this`license`or`\(at`your`option\)`any`later`version\.(?:`)?(?:%)?(?:`)?the`latest`version`of`this`license`is`in(?:`)?(?:%)?(?:`)?http:`www\.`latex\-`project\.`org`lppl\.`txt(?:`)?(?:%)?(?:`)?and`version`1\.2`or`later`is`part`of`all`distributions`of`latex(?:`)?(?:%)?(?:`)?version`1999`12`01`or`later\.(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?this`program`consists`of`the(?:`)?(?:.+)(?:`)?`given`such`a`notice`and`statement`in`a`file,`the`conditions`given`in`this`license`document`would`apply,`with`the`program`referring`to`the`two`files`pig\.`dtx`and`pig\.`ins`,`and`the`copyright`holder`referring`to`the`person`m\.`y\.`name`\.`important`recommendations`\-\-\-\-\-\-\-\-\-\-\-\-\-`defining`what`constitutes`the`program`the`lppl`requires`that`distributions`of`the`program`contain`all`the`files`of`the`program\.`it`is`therefore`important`that`you`provide`a`way`for`the`licensee`to`determine`which`files`constitute`the`program\.`this`could,`for`example,`be`achieved`by`explicitly`listing`all`the`files`of`the`program`near`the`copyright`notice`of`each`file`or`by`using`a`line`like`%`this`program`consists`of`all`files`listed`in`manifest\.`txt\.`in`that`place\.`in`the`absence`of`an`unequivocal`list`it`might`be`impossible`for`the`licensee`to`determine`what`is`considered`by`you`to`comprise`the`program\.`noting`exceptional`files`if`the`program`contains`any`files`bearing`additional`conditions`on`modification,`or`on`distribution`of`modified`versions,`of`those`files`\(other`than`those`listed`in`additional`conditions`on`latex`software`files`\),`then`it`is`recommended`that`the`program`contain`a`prominent`file`that`defines`the`exceptional`conditions,`and`either`lists`the`exceptional`files`or`defines`one`or`more`categories`of`exceptional`files\.`files`containing`the`text`of`a`license`\(such`as`this`file\)`are`often`examples`of`files`bearing`more`restrictive`conditions`on`modification\.`latex`configuration`files`\(with`filename`extension`\.`cfg`\)`are`examples`of`files`bearing`less`restrictive`conditions`on`the`distribution`of`a`modified`version`of`the`file\.`the`additional`conditions`on`latex`software`given`above`are`examples`of`declaring`a`category`of`files`bearing`exceptional`additional`conditions\.