(?:`)?(?:the`latex`project`public`license`=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-=\-`lppl`version`1\.3a`2004\-10\-01)?(?:`)?(?:`)?(?:.{,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`primary`license`under`which`the`the`latex`kernel`and`the`base`latex`packages`are`distributed\.`you`may`use`this`license`for`any`work`of`which`you`hold`the`copyright`and`which`you`wish`to`distribute\.`this`license`may`be`particularly`suitable`if`your`work`is`tex\-`related`\(such`as`a`latex`package\),`but`you`may`use`it`with`small`modifications`even`if`your`work`is`unrelated`to`tex\.`the`section`whether`and`how`to`distribute`works`under`this`license`,`below,`gives`instructions,`examples,`and`recommendations`for`authors`who`are`considering`distributing`their`works`under`this`license\.`this`license`gives`conditions`under`which`a`work`may`be`distributed`and`modified,`as`well`as`conditions`under`which`modified`versions`of`that`work`may`be`distributed\.`we,`the`latex3`project,`believe`that`the`conditions`below`give`you`the`freedom`to`make`and`distribute`modified`versions`of`your`work`that`conform`with`whatever`technical`specifications`you`wish`while`maintaining`the`availability,`integrity,`and`reliability`of`that`work\.`if`you`do`not`see`how`to`achieve`your`goal`while`meeting`these`conditions,`then`read`the`document`cfgguide\.`tex`and`modguide\.`tex`in`the`base`latex`distribution`for`suggestions\.`definitions`===========`in`this`license`document`the`following`terms`are`used:`work`any`work`being`distributed`under`this`license\.`derived`work`any`work`that`under`any`applicable`law`is`derived`from`the`work\.`modification`any`procedure`that`produces`a`derived`work`under`any`applicable`law`\-`for`example,`the`production`of`a`file`containing`an`original`file`associated`with`the`work`or`a`significant`portion`of`such`a`file,`either`verbatim`or`with`modifications`and`or`translated`into`another`language\.`modify`to`apply`any`procedure`that`produces`a`derived`work`under`any`applicable`law\.`distribution`making`copies`of`the`work`available`from`one`person`to`another,`in`whole`or`in`part\.`distribution`includes`\(but`is`not`limited`to\)`making`any`electronic`components`of`the`work`accessible`by`file`transfer`protocols`such`as`ftp`or`http`or`by`shared`file`systems`such`as`sun`s`network`file`system`\(nfs\)\.`compiled`work`a`version`of`the`work`that`has`been`processed`into`a`form`where`it`is`directly`usable`on`a`computer`system\.`this`processing`may`include`using`installation`facilities`provided`by`the`work,`transformations`of`the`work,`copying`of`components`of`the`work,`or`other`activities\.`note`that`modification`of`any`installation`facilities`provided`by`the`work`constitutes`modification`of`the`work\.`current`maintainer`a`person`or`persons`nominated`as`such`within`the`work\.`if`there`is`no`such`explicit`nomination`then`it`is`the`copyright`holder`under`any`applicable`law\.`base`interpreter`a`program`or`process`that`is`normally`needed`for`running`or`interpreting`a`part`or`the`whole`of`the`work\.`a`base`interpreter`may`depend`on`external`components`but`these`are`not`considered`part`of`the`base`interpreter`provided`that`each`external`component`clearly`identifies`itself`whenever`it`is`used`interactively\.`unless`explicitly`specified`when`applying`the`license`to`the`work,`the`only`applicable`base`interpreter`is`a`latex\-`format`\.`conditions`on`distribution`and`modification`===========================================(?:`)?(?:.{,20})(?:`)?activities`other`than`distribution`and`or`modification`of`the`work`are`not`covered`by`this`license;`they`are`outside`its`scope\.`in`particular,`the`act`of`running`the`work`is`not`restricted`and`no`requirements`are`made`concerning`any`offers`of`support`for`the`work\.(?:`)?(?:.{,20})(?:`)?you`may`distribute`a`complete,`unmodified`copy`of`the`work`as`you`received`it\.`distribution`of`only`part`of`the`work`is`considered`modification`of`the`work,`and`no`right`to`distribute`such`a`derived`work`may`be`assumed`under`the`terms`of`this`clause\.(?:`)?(?:.{,20})(?:`)?you`may`distribute`a`compiled`work`that`has`been`generated`from`a`complete,`unmodified`copy`of`the`work`as`distributed`under`clause`2`above,`as`long`as`that`compiled`work`is`distributed`in`such`a`way`that`the`recipients`may`install`the`compiled`work`on`their`system`exactly`as`it`would`have`been`installed`if`they`generated`a`compiled`work`directly`from`the`work\.(?:`)?(?:.{,20})(?:`)?if`you`are`the`current`maintainer`of`the`work,`you`may,`without`restriction,`modify`the`work,`thus`creating`a`derived`work\.`you`may`also`distribute`the`derived`work`without`restriction,`including`compiled`works`generated`from`the`derived`work\.`derived`works`distributed`in`this`manner`by`the`current`maintainer`are`considered`to`be`updated`versions`of`the`work\.(?:`)?(?:.{,20})(?:`)?if`you`are`not`the`current`maintainer`of`the`work,`you`may`modify`your`copy`of`the`work,`thus`creating`a`derived`work`based`on`the`work,`and`compile`this`derived`work,`thus`creating`a`compiled`work`based`on`the`derived`work\.(?:`)?(?:.{,20})(?:`)?if`you`are`not`the`current`maintainer`of`the`work,`you`may`distribute`a`derived`work`provided`the`following`conditions`are`met`for`every`component`of`the`work`unless`that`component`clearly`states`in`the`copyright`notice`that`it`is`exempt`from`that`condition\.`only`the`current`maintainer`is`allowed`to`add`such`statements`of`exemption`to`a`component`of`the`work\.(?:`)?(?:.{,20})(?:`)?if`a`component`of`this`derived`work`can`be`a`direct`replacement`for`a`component`of`the`work`when`that`component`is`used`with`the`base`interpreter,`then,`wherever`this`component`of`the`work`identifies`itself`to`the`user`when`used`interactively`with`that`base`interpreter,`the`replacement`component`of`this`derived`work`clearly`and`unambiguously`identifies`itself`as`a`modified`version`of`this`component`to`the`user`when`used`interactively`with`that`base`interpreter\.(?:`)?(?:.{,20})(?:`)?every`component`of`the`derived`work`contains`prominent`notices`detailing`the`nature`of`the`changes`to`that`component,`or`a`prominent`reference`to`another`file`that`is`distributed`as`part`of`the`derived`work`and`that`contains`a`complete`and`accurate`log`of`the`changes\.(?:`)?(?:.{,20})(?:`)?no`information`in`the`derived`work`implies`that`any`persons,`including`\(but`not`limited`to\)`the`authors`of`the`original`version`of`the`work,`provide`any`support,`including`\(but`not`limited`to\)`the`reporting`and`handling`of`errors,`to`recipients`of`the`derived`work`unless`those`persons`have`stated`explicitly`that`they`do`provide`such`support`for`the`derived`work\.(?:`)?(?:.{,20})(?:`)?you`distribute`at`least`one`of`the`following`with`the`derived`work:(?:`)?(?:.{,20})(?:`)?a`complete,`unmodified`copy`of`the`work;`if`your`distribution`of`a`modified`component`is`made`by`offering`access`to`copy`the`modified`component`from`a`designated`place,`then`offering`equivalent`access`to`copy`the`work`from`the`same`or`some`similar`place`meets`this`condition,`even`though`third`parties`are`not`compelled`to`copy`the`work`along`with`the`modified`component;(?:`)?(?:.{,20})(?:`)?information`that`is`sufficient`to`obtain`a`complete,`unmodified`copy`of`the`work\.(?:`)?(?:.{,20})(?:`)?if`you`are`not`the`current`maintainer`of`the`work,`you`may`distribute`a`compiled`work`generated`from`a`derived`work,`as`long`as`the`derived`work`is`distributed`to`all`recipients`of`the`compiled`work,`and`as`long`as`the`conditions`of`clause`6,`above,`are`met`with`regard`to`the`derived`work\.(?:`)?(?:.{,20})(?:`)?the`conditions`above`are`not`intended`to`prohibit,`and`hence`do`not`apply`to,`the`modification,`by`any`method,`of`any`component`so`that`it`becomes`identical`to`an`updated`version`of`that`component`of`the`work`as`it`is`distributed`by`the`current`maintainer`under`clause`4,`above\.(?:`)?(?:.{,20})(?:`)?distribution`of`the`work`or`any`derived`work`in`an`alternative`format,`where`the`work`or`that`derived`work`\(in`whole`or`in`part\)`is`then`produced`by`applying`some`process`to`that`format,`does`not`relax`or`nullify`any`sections`of`this`license`as`they`pertain`to`the`results`of`applying`that`process\.(?:`)?(?:.{,20})(?:`)?(?:`)?(?:.{,20})(?:`)?a`derived`work`may`be`distributed`under`a`different`license`provided`that`license`itself`honors`the`conditions`listed`in`clause`6`above,`in`regard`to`the`work,`though`it`does`not`have`to`honor`the`rest`of`the`conditions`in`this`license\.(?:`)?(?:.{,20})(?:`)?if`a`derived`work`is`distributed`under`this`license,`that`derived`work`must`provide`sufficient`documentation`as`part`of`itself`to`allow`each`recipient`of`that`derived`work`to`honor`the`restrictions`in`clause`6`above,`concerning`changes`from`the`work\.(?:`)?(?:.{,20})(?:`)?this`license`places`no`restrictions`on`works`that`are`unrelated`to`the`work,`nor`does`this`license`place`any`restrictions`on`aggregating`such`works`with`the`work`by`any`means\.(?:`)?(?:.{,20})(?:`)?nothing`in`this`license`is`intended`to,`or`may`be`used`to,`prevent`complete`compliance`by`all`parties`with`all`applicable`laws\.`no`warranty`===========`there`is`no`warranty`for`the`work\.`except`when`otherwise`stated`in`writing,`the`copyright`holder`provides`the`work`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`work`is`with`you\.`should`the`work`prove`defective,`you`assume`the`cost`of`all`necessary`servicing,`repair,`or`correction\.`in`no`event`unless`required`by`applicable`law`or`agreed`to`in`writing`will`the`copyright`holder,`or`any`author`named`in`the`components`of`the`work,`or`any`other`party`who`may`distribute`and`or`modify`the`work`as`permitted`above,`be`liable`to`you`for`damages,`including`any`general,`special,`incidental`or`consequential`damages`arising`out`of`any`use`of`the`work`or`out`of`inability`to`use`the`work`\(including,`but`not`limited`to,`loss`of`data,`data`being`rendered`inaccurate,`or`losses`sustained`by`anyone`as`a`result`of`any`failure`of`the`work`to`operate`with`any`other`programs\),`even`if`the`copyright`holder`or`said`author`or`said`other`party`has`been`advised`of`the`possibility`of`such`damages\.`maintenance`of`the`work`=======================`the`work`has`the`status`author\-`maintained`if`the`copyright`holder`explicitly`and`prominently`states`near`the`primary`copyright`notice`in`the`work`that`the`work`can`only`be`maintained`by`the`copyright`holder`or`simply`that`is`author\-`maintained`\.`the`work`has`the`status`maintained`if`there`is`a`current`maintainer`who`has`indicated`in`the`work`that`they`are`willing`to`receive`error`reports`for`the`work`\(for`example,`by`supplying`a`valid`e\-`mail`address\)\.`it`is`not`required`for`the`current`maintainer`to`acknowledge`or`act`upon`these`error`reports\.`the`work`changes`from`status`maintained`to`unmaintained`if`there`is`no`current`maintainer,`or`the`person`stated`to`be`current`maintainer`of`the`work`cannot`be`reached`through`the`indicated`means`of`communication`for`a`period`of`six`months,`and`there`are`no`other`significant`signs`of`active`maintenance\.`you`can`become`the`current`maintainer`of`the`work`by`agreement`with`any`existing`current`maintainer`to`take`over`this`role\.`if`the`work`is`unmaintained,`you`can`become`the`current`maintainer`of`the`work`through`the`following`steps:(?:`)?(?:.{,20})(?:`)?make`a`reasonable`attempt`to`trace`the`current`maintainer`\(and`the`copyright`holder,`if`the`two`differ\)`through`the`means`of`an`internet`or`similar`search\.(?:`)?(?:.{,20})(?:`)?if`this`search`is`successful,`then`enquire`whether`the`work`is`still`maintained\.(?:`)?(?:.{,20})(?:`)?if`it`is`being`maintained,`then`ask`the`current`maintainer`to`update`their`communication`data`within`one`month\.(?:`)?(?:.{,20})(?:`)?if`the`search`is`unsuccessful`or`no`action`to`resume`active`maintenance`is`taken`by`the`current`maintainer,`then`announce`within`the`pertinent`community`your`intention`to`take`over`maintenance\.`\(if`the`work`is`a`latex`work,`this`could`be`done,`for`example,`by`posting`to`comp\.`text\.`tex\.\)(?:`)?(?:.{,20})(?:`)?if`the`current`maintainer`is`reachable`and`agrees`to`pass`maintenance`of`the`work`to`you,`then`this`takes`effect`immediately`upon`announcement\.(?:`)?(?:.{,20})(?:`)?if`the`current`maintainer`is`not`reachable`and`the`copyright`holder`agrees`that`maintenance`of`the`work`be`passed`to`you,`then`this`takes`effect`immediately`upon`announcement\.(?:`)?(?:.{,20})(?:`)?if`you`make`an`intention`announcement`as`described`in`2b\.`above`and`after`three`months`your`intention`is`challenged`neither`by`the`current`maintainer`nor`by`the`copyright`holder`nor`by`other`people,`then`you`may`arrange`for`the`work`to`be`changed`so`as`to`name`you`as`the`\(new\)`current`maintainer\.(?:`)?(?:.{,20})(?:`)?`if`the`previously`unreachable`current`maintainer`becomes`reachable`once`more`within`three`months`of`a`change`completed`under`the`terms`of`3b\)`or`4\),`then`that`current`maintainer`must`become`or`remain`the`current`maintainer`upon`request`provided`they`then`update`their`communication`data`within`one`month\.`a`change`in`the`current`maintainer`does`not,`of`itself,`alter`the`fact`that`the`work`is`distributed`under`the`lppl`license\.`if`you`become`the`current`maintainer`of`the`work,`you`should`immediately`provide,`within`the`work,`a`prominent`and`unambiguous`statement`of`your`status`as`current`maintainer\.`you`should`also`announce`your`new`status`to`the`same`pertinent`community`as`in`2b\)`above\.`whether`and`how`to`distribute`works`under`this`license`======================================================`this`section`contains`important`instructions,`examples,`and`recommendations`for`authors`who`are`considering`distributing`their`works`under`this`license\.`these`authors`are`addressed`as`you`in`this`section\.`choosing`this`license`or`another`license`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`if`for`any`part`of`your`work`you`want`or`need`to`use`\*distribution\*`conditions`that`differ`significantly`from`those`in`this`license,`then`do`not`refer`to`this`license`anywhere`in`your`work`but,`instead,`distribute`your`work`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`work`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`work`is`unrelated`to`latex,`the`discussion`in`modguide\.`tex`may`still`be`relevant,`and`authors`intending`to`distribute`their`works`under`any`license`are`encouraged`to`read`it\.`a`recommendation`on`modification`without`distribution`\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-`it`is`wise`never`to`modify`a`component`of`the`work,`even`for`your`own`personal`use,`without`also`meeting`the`above`conditions`for`distributing`the`modified`component\.`while`you`might`intend`that`such`modifications`will`never`be`distributed,`often`this`will`happen`by`accident`\-`you`may`forget`that`you`have`modified`that`component;`or`it`may`not`occur`to`you`when`allowing`others`to`access`the`modified`version`that`you`are`thus`distributing`it`and`violating`the`conditions`of`this`license`in`ways`that`could`have`legal`implications`and,`worse,`cause`problems`for`the`community\.`it`is`therefore`usually`in`your`best`interest`to`keep`your`copy`of`the`work`identical`with`the`public`one\.`many`works`provide`ways`to`control`the`behavior`of`that`work`without`altering`any`of`its`licensed`components\.`how`to`use`this`license`\-\-\-\-\-\-\-\-\-\-\-\-`to`use`this`license,`place`in`each`of`the`components`of`your`work`both`an`explicit`copyright`notice`including`your`name`and`the`year`the`work`was`authored`and`or`last`substantially`modified\.`include`also`a`statement`that`the`distribution`and`or`modification`of`that`component`is`constrained`by`the`conditions`in`this`license\.`here`is`an`example`of`such`a`notice`and`statement:(?:`)?(?:%%)?(?:`)?(?:`)?(?:.+)(?:`)?(?:`)?(?:%%)?(?:`)?copyright(?:`)?(?:.+)(?:`)?(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?this`work`may`be`distributed`and`or`modified`under`the(?:`)?(?:%)?(?:`)?conditions`of`the`latex`project`public`license,`either`version`1\.3(?:`)?(?:%)?(?:`)?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\.3`or`later`is`part`of`all`distributions`of`latex(?:`)?(?:%)?(?:`)?version`2003`12`01`or`later\.(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?this`work`has`the`lppl`maintenance`status`(?:`)?(?:(?:author\-maintained|unmaintained|maintained))(?:`)?`\.(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?(?:`)?(?:Th(?:is|e))(?:`)?current`maintainer`of`this`work`is(?:`)?(?:.+)(?:`)?\.(?:`)?(?:%)?(?:`)?(?:`)?(?:%)?(?:`)?this`work`consists`of`the(?:`)?(?:.+)(?:`)?\.`given`such`a`notice`and`statement`in`a`file,`the`conditions`given`in`this`license`document`would`apply,`with`the`work`referring`to`the`three`files`pig\.`dtx`,`pig\.`ins`,`and`pig\.`sty`\(the`last`being`generated`from`pig\.`dtx`using`pig\.`ins`\),`the`base`interpreter`referring`to`any`latex\-`format`,`and`both`copyright`holder`and`current`maintainer`referring`to`the`person`m\.`y\.`name`\.`if`you`do`not`want`the`maintenance`section`of`lppl`to`apply`to`your`work,`change`maintained`above`into`author\-`maintained`\.`however,`we`recommend`that`you`use`maintained`as`the`maintenance`section`was`added`in`order`to`ensure`that`your`work`remains`useful`to`the`community`even`when`you`can`no`longer`maintain`and`support`it`yourself\.`important`recommendations`\-\-\-\-\-\-\-\-\-\-\-\-\-`defining`what`constitutes`the`work`the`lppl`requires`that`distributions`of`the`work`contain`all`the`files`of`the`work\.`it`is`therefore`important`that`you`provide`a`way`for`the`licensee`to`determine`which`files`constitute`the`work\.`this`could,`for`example,`be`achieved`by`explicitly`listing`all`the`files`of`the`work`near`the`copyright`notice`of`each`file`or`by`using`a`line`such`as:`%`this`work`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`work`and,`in`such`a`case,`the`licensee`would`be`entitled`to`make`reasonable`conjectures`as`to`which`files`comprise`the`work\.