{"id":35537,"date":"2019-10-31T22:04:55","date_gmt":"2019-10-31T19:04:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/elektronnye-knigi-i-ih-formaty-fb2-i-fb3-istoriya-plyusy-minusy-i-printsipy-raboty\/"},"modified":"2019-10-31T22:04:55","modified_gmt":"2019-10-31T19:04:55","slug":"elektronnye-knigi-i-ih-formaty-fb2-i-fb3-istoriya-plyusy-minusy-i-printsipy-raboty","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/elektronnye-knigi-i-ih-formaty-fb2-i-fb3-istoriya-plyusy-minusy-i-printsipy-raboty","title":{"rendered":"Elektronske knjige in njihovi formati: FB2 in FB3 \u2014 zgodovina, prednosti, slabosti in na\u010dela delovanja","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V prej\u0161njem gradivu smo govorili o <noindex><a rel=\"nofollow\" href=\"https:\/\/geektimes.com\/company\/maccentre\/blog\/299737\/\">posebnostih formata DjVu<\/a><\/noindex>. Danes se bomo ustavili na formatu FictionBook2, bolj znanem kot FB2, in njegovem \"nadaljevanju\" FB3.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/geektimes.com\/company\/maccentre\/blog\/300385\/\"><img decoding=\"async\" alt=\"Elektronske knjige in njihovi formati: FB2 in FB3 \u2014 zgodovina, prednosti, slabosti in na\u010dela delovanja\" src=\"\/wp-content\/uploads\/2019\/06\/71054bc98a84eefeb99cf0b858273471.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>\/ Flickr \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/juditk\/4830334394\/\">Judit Klein<\/a><\/noindex> \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/creativecommons.org\/licenses\/by-nd\/2.0\/\">CC<\/a><\/noindex><\/i><\/p>\n<h2>Pojav formata<\/h2>\n<p>\nV sredini 90-ih let so navdu\u0161enci <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/FictionBook\">za\u010deli<\/a><\/noindex> digitalizirati sovjetske knjige. Prevzdali so in shranjevali literaturo v razli\u010dnih formatih. Ena prvih knji\u017enic v RuNetu je bila <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%91%D0%B8%D0%B1%D0%BB%D0%B8%D0%BE%D1%82%D0%B5%D0%BA%D0%B0_%D0%9C%D0%B0%D0%BA%D1%81%D0%B8%D0%BC%D0%B0_%D0%9C%D0%BE%D1%88%D0%BA%D0%BE%D0%B2%D0%B0\">Knji\u017enica Maksima Mo\u0161kova<\/a><\/noindex> \u2014 je uporabljala formatirane besedilne datoteke (TXT).<\/p>\n<p>Izbira je bila narejena zaradi odpornosti na po\u0161kodbe bajtov in vsestranskosti \u2014 TXT se odpre na katerem koli operacijskem sistemu. Vendar pa je <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A2%D0%B5%D0%BA%D1%81%D1%82%D0%BE%D0%B2%D1%8B%D0%B9_%D1%84%D0%B0%D0%B9%D0%BB\">ote\u017eevalo<\/a><\/noindex> obdelavo shranjenih besedilnih informacij. Na primer, za prehod na tiso\u010do vrstico je bilo potrebno obdelati 999 vrstic, ki so ji predhodile. Knjige so prav tako <noindex><a rel=\"nofollow\" href=\"http:\/\/www.fictionbook.org\/index.php\/%D0%9C%D0%B5%D1%81%D1%82%D0%BE_%D1%81%D1%82%D0%B0%D0%BD%D0%B4%D0%B0%D1%80%D1%82%D0%B0_%D0%B2_%D0%BC%D0%B8%D1%80%D0%B5_%D1%8D%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BD%D0%BD%D0%BE%D0%B9_%D0%BB%D0%B8%D1%82%D0%B5%D1%80%D0%B0%D1%82%D1%83%D1%80%D1%8B\">shranjevale<\/a><\/noindex> v 'Wordovih' dokumentih in PDF \u2014 tega je bilo te\u017eko pretvoriti v druge formate, \u0161ibki ra\u010dunalniki pa so odprli in <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Portable_Document_Format\">prikazovali<\/a><\/noindex> PDF-dokumente z zamudami.<\/p>\n<p>Tudi za 'shranjevanje' elektronske literature so uporabljali HTML. Poenostavil je indeksiranje, pretvorbo v druge formate in ustvarjanje dokumentov (ozna\u010devanje besedila z oznakami), a je prinesel tudi svoje pomanjkljivosti. Ena najve\u010djih je bila \"<noindex><a rel=\"nofollow\" href=\"http:\/\/www.fictionbook.org\/index.php\/%D0%A7%D1%82%D0%BE_%D1%82%D0%B0%D0%BA%D0%BE%D0%B5_FictionBook\">nejasnost<\/a><\/noindex>&raquo; standarda: omogo\u010dal je dolo\u010dene svobo&scaron;\u010dine pri pisanju oznak. Nekatere od njih so morale biti zaprte, druge (na primer, &lt;p&gt;) &ndash; zapiranje ni bilo obvezno. Same oznake so lahko imele poljuben vrstni red vgrajevanja.<\/p>\n<p>In \u010deprav tovrstno delo s datotekami ni bilo spodbujano \u2014 taki dokumenti so veljali za neustrezne \u2014 je standard od bralnikov zahteval, da poskusijo prikazati vsebino. Tu so nastajale te\u017eave, saj je bil v vsaki aplikaciji postopek 'dovr\u0161evanja' realiziran na svoj na\u010din. Hkrati pa so bila v tistem \u010dasu obstoje\u010da tr\u017ei\u0161\u010da naprav in aplikacij za branje <noindex><a rel=\"nofollow\" href=\"https:\/\/vc.ru\/7998-litres-history\">razumela<\/a><\/noindex> eno ali dve specializirani formati. \u010ce je bila knjiga v enem formatu, jo je bilo potrebno preoblikovati, da bi jo lahko prebrali. Re\u0161evanje vseh teh pomanjkljivosti je bil namenjen <noindex><a rel=\"nofollow\" href=\"http:\/\/www.gribuser.ru\/xml\/fictionbook\/\">FictionBook2<\/a><\/noindex>, ali FB2, ki je prevzel primarno 'ureditev' besedila in konverzijo.<\/p>\n<blockquote><p>Omeniti velja, da je imel format prvo razli\u010dico \u2014 <noindex><a rel=\"nofollow\" href=\"http:\/\/www.gribuser.ru\/xml\/fictionbook\/history\/1.0\/index.html\">FictionBook1<\/a><\/noindex> \u2014 ki pa je imela le eksperimentalni zna\u010daj, je obstajala kratek \u010das, danes ni podprta in nima obratne zdru\u017eljivosti. Zato se pod FictionBook najpogosteje razume njegovega 'nadaljevanja' \u2014 format FB2.<\/p><\/blockquote>\n<p>\nFB2 je ustvarila skupina razvijalcev, ki jo je vodil <noindex><a rel=\"nofollow\" href=\"https:\/\/www.litres.ru\/o-kompanii\/biografii\/dmitriy-gribov\/\">Dmitrij Gribov<\/a><\/noindex>, ki je tehni\u010dni direktor podjetja \u00abLitRes\u00bb, in Mihail M\u0430\u0446nev, ustvarjalec bralca Haali Reader. Osnova formata je XML, ki je stro\u017eji od HTML in ureja delo z ne zaprtimi in vne\u0161ene oznake. XML-dokument spremlja tako imenovana XML-shema. XML-shema je poseben dokument, v katerem so zbrane vse oznake in opisana pravila njihove uporabe (zaporedje, vne\u0161enost, obveznost in neobveznost itd.). V FictionBook se shema nahaja v datoteki FictionBook2.xsd. Primer XML-sheme lahko najdete po <noindex><a rel=\"nofollow\" href=\"http:\/\/fictionbook.org\/index.php\/XML_%D1%81%D1%85%D0%B5%D0%BC%D0%B0_FictionBook2.2\">linku<\/a><\/noindex> (ki jo uporablja trgovina z elektronskimi knjigami \u00abLitRes\u00bb).<\/p>\n<h2>Struktura dokumenta FB2<\/h2>\n<p>\nBesedilo v dokumentu <noindex><a rel=\"nofollow\" href=\"http:\/\/fictionbook.org\/index.php\/Eng:FictionBook_description\">shranjuje<\/a><\/noindex> v posebnih oznakah &mdash; elementih tipov odstavkov: &lt;p&gt;, &lt;v&gt; in &lt;subtitle&gt;. Prav tako obstaja element &lt;empty-line&gt;, ki nima vsebine in se uporablja za vstavljanje presledkov.<\/p>\n<p>Vsi dokumenti se za\u010dnejo z osnovnim oznako &lt;fictionbook&gt;, pod katero se lahko pojavljajo &lt;stylesheet&gt;, &lt;description&gt;, &lt;body&gt; in &lt;binary&gt;.<\/p>\n<p>Oznaka  vsebuje stile, da olaj\u0161a pretvorbo v druge formate. V  so shranjeni podatki, kodirani s pomo\u010djo <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Base64\">base64<\/a><\/noindex> ki so lahko potrebni za upodabljanje dokumenta.<\/p>\n<p>Element  vsebuje vse potrebne informacije o knjigi: \u017eanr dela, seznam avtorjev (ime, priimek, e-naslov in spletna stran), naslov, blok s klju\u010dnimi besedami, povzetek. Vsebovati je tudi mogo\u010de informacije o spremembah v dokumentu in podatke o zalo\u017eniku knjige, \u010de je bila izdana v tiskani obliki.<\/p>\n<p>Tako izgleda del bloka  v zapisu FictionBook za <noindex><a rel=\"nofollow\" href=\"http:\/\/www.gutenberg.org\/ebooks\/244\">delo<\/a><\/noindex> \u00abStudija v grimiznih tonih\u00bb Arthurja Conana Doyla, ki je bilo pridobljeno iz <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Project_Gutenberg\">Projekt \u00abGutenberg\u00bb<\/a><\/noindex>:<\/p>\n<pre><code class=\"xml\">detektivka\n      \n        Arthur\n        Conan\n        Doyle\n      \n      A Study in Scarlet\n      <annotation>\n      <\/annotation>\n      1887\n<\/code><\/pre>\n<p>\nKlju\u010dna komponenta FictionBook dokumenta je &lt;body&gt;. Vsebuje neposredno besedilo knjige. V celotnem dokumentu je lahko ve\u010d teh oznak &mdash; dodatne blokovne oznake se uporabljajo za shranjevanje opomb, komentarjev in pripomb.<\/p>\n<p>FictionBook prav tako ponuja ve\u010d oznak za delo s hiperlinki. Temeljijo na specifikaciji <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/XLink\">XLink<\/a><\/noindex>, ki jo je razvilo zdru\u017eenje <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9A%D0%BE%D0%BD%D1%81%D0%BE%D1%80%D1%86%D0%B8%D1%83%D0%BC_%D0%92%D1%81%D0%B5%D0%BC%D0%B8%D1%80%D0%BD%D0%BE%D0%B9_%D0%BF%D0%B0%D1%83%D1%82%D0%B8%D0%BD%D1%8B\">W3C<\/a><\/noindex> posebej za ustvarjanje povezav med razli\u010dnimi viri v XML-dokumentih.<\/p>\n<h2>Prednosti formata<\/h2>\n<p>\nStandarde FB2 vklju\u010duje le minimalno potrebno \u0161tevilo oznak (zadostno za \u00aboblikovanje\u00bb leposlovja), kar poenostavi njegovo obdelavo s strani bralnikov. Kadar bralnik neposredno deluje s formatom FB, ima uporabnik mo\u017enost prilagoditi skoraj vse parametre prikazovanja.<\/p>\n<p>Stroga struktura dokumenta omogo\u010da avtomatizacijo procesa pretvorbe iz formata FB v katerikoli drug. Ta struktura prav tako omogo\u010da delo z individualnimi elementi dokumentov \u2014 nastavitev filtrov po avtorjih knjig, naslovu, \u017eanru in drugem. Iz tega razloga je format FB2 pridobil priljubljenost v RuNetu in postal privzeti standard v ruskih elektronskih knji\u017enicah in knji\u017enicah dr\u017eav SND.<\/p>\n<h2>Pomanjkljivosti formata<\/h2>\n<p>\nEnostavnost formata FB2 je hkrati njegova prednost in slabost. To omejuje funkcionalnost za kompleksno oblikovanje besedila (na primer, opombe na robu). V njem ni vektorske grafike in podpore za o\u0161tevil\u010dene sezname. Iz tega razloga <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/FictionBook\">ni prav posebej primeren<\/a><\/noindex> za u\u010dbenike, priro\u010dnike in tehni\u010dno literaturo (o tem celo govori samo ime formata \u2014 fiction book ali 'umetna knjiga').<\/p>\n<p>Da bi pa prikazali minimalne informacije o knjigi \u2014 naslov, avtorja in naslovnico \u2014 mora program obdelati skoraj celoten XML-dokument. To je povezano s tem, da so metapodatki na za\u010detku besedila, slike pa na koncu.<\/p>\n<h2>FB3 \u2014 razvoj formata<\/h2>\n<p>\nZaradi pove\u010danih zahtev za oblikovanje besedil knjig (in da bi omilili nekatere slabosti FB2) je Gribov za\u010del delati na formatu FB3. Kasneje je razvoj zastal, vendar je bila leta 2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/vc.ru\/7998-litres-history\">ponovno za\u010deli<\/a><\/noindex>.<\/p>\n<p>Po besedah avtorjev so prou\u010dili dejanske potrebe pri izdaji tehni\u010dne literature, gledali u\u010dbenike, priro\u010dnike, pomo\u017ene materiale in zasnovali bolj specifi\u010den niz oznak, ki bi omogo\u010dil prikaz katere koli knjige.<\/p>\n<p>V novi specifikaciji format FictionBook predstavlja zip-arhiv, v katerem so posamezne datoteke za metapodatke, slike in besedilo. Zahteve do formata zip-datoteke in dogovori o njeni organizaciji so zapisani v standardu <noindex><a rel=\"nofollow\" href=\"http:\/\/www.ecma-international.org\/publications\/standards\/Ecma-376.htm\">ECMA-376<\/a><\/noindex>, ki dolo\u010da Open XML.<\/p>\n<p>Izvedenih je bilo ve\u010d izbolj\u0161av, povezanih z oblikovanjem (razmik, pod\u010drtovanje) in dodan je nov objekt \u2014 'blok' \u2014 ki oblikuje poljuben del knjige v obliki \u0161tirikotnika in se lahko vklju\u010duje v besedilo s prelivanjem. Pojavila se je podpora za o\u0161tevil\u010dene in ozna\u010dene sezname.<\/p>\n<p>FB3 se distribuira pod svobodno licenco in ima odprtokodno kodo, zato so zalo\u017enikom in uporabnikom na voljo vse pripomo\u010dke: pretvorniki, obla\u010dne urednike, bralniki. Trenutno <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/gribuser\/FB3\">razli\u010dico<\/a><\/noindex> formata, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Litres\/FB3Reader\">bralnik<\/a><\/noindex> in <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Litres\/FB3Editor\">urednik<\/a><\/noindex> lahko najdete v projektu na GitHubu.<\/p>\n<p>Na splo\u0161no je FictionBook3 \u0161e vedno manj raz\u0161irjen kot njegov starej\u0161i brat, vendar \u017ee ve\u010d elektronskih knji\u017enic ponuja knjige v tem formatu. \u0160e pred dvema letoma je \u00abLitRes\u00bb napovedal, da namerava prevesti celoten katalog na nov format. Del bralnikov \u017ee podpira vse potrebne funkcionalnosti FB3. Na primer, vse sodobne modele bralnikov ONYX, kot so <noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/boox_darwin3\">Darwin 3<\/a><\/noindex> ili <noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/boox_cleopatra3\">Cleopatra 3<\/a><\/noindex>.<\/p>\n<p><img decoding=\"async\" alt=\"Elektronske knjige in njihovi formati: FB2 in FB3 \u2014 zgodovina, prednosti, slabosti in na\u010dela delovanja\" src=\"\/wp-content\/uploads\/2019\/06\/cffd84210804f2e14a097c65bea85f44.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ <noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/boox_cleopatra3\">ONYX BOOX Cleopatra 3<\/a><\/noindex><\/i><\/p>\n<p>\u0160ir\u0161a raz\u0161irjenost FictionBook3 bo omogo\u010dila oblikovanje ekosistema, <noindex><a rel=\"nofollow\" href=\"http:\/\/www.fictionbook.org\/index.php\/FictionBook_3.0_beta_-_%D0%BA%D1%80%D0%B0%D1%82%D0%BA%D0%BE%D0%B5_%D0%BE%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5\">osredoto\u010den<\/a><\/noindex> za popolno in u\u010dinkovito delo s pisavo na katerem koli napravah z omejenimi viri: \u010drno-belimi ali manj\u0161imi zasloni, majhno koli\u010dino pomnilnika itd. Po besedah razvijalcev bo enkrat zasnovana knjiga maksimalno priro\u010dna v vsakem okolju.<\/p>\n<p>\n<i>P.S. Predlagamo vam ve\u010d pregledov bralnikov ONYX BOOX:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/review\/ebook-onyx-boox-darwin3-4pda\/\">Pregled ONYX BOOX Darwin 3: ve\u010d kot le e-knjiga<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/review\/ebook-onyx-boox-chronos-geektimes\/\">Tehnologije proti 'anti\u010dnosti': pregled e-bralnika ONYX BOOX Chronos<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/review\/ebook-onyx-boox-cleopatra3-geektimes\/\">Kraljica rada bere: pregled elektronske knjige ONYX BOOX Cleopatra 3<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/onyx-boox.ru\/review\/ebook-onyx-boox-darwin4-megaobzor\/\">Pregled ONYX BOOX Darwin 4: najbolj\u0161a elektronska knjiga na E-Ink<\/a><\/noindex><\/li>\n<\/ul>\n<p><\/i><br \/>\n<br \/>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/maccentre\/blog\/411755\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u043e\u0448\u043b\u043e\u043c \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u043b\u0438 \u043e\u0431 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044f\u0445 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 DjVu. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043c\u044b \u0440\u0435\u0448\u0438\u043b\u0438 \u043e\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c\u0441\u044f \u043d\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 FictionBook2, \u0431\u043e\u043b\u0435\u0435 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e\u043c \u043a\u0430\u043a FB2, \u0438 \u0435\u0433\u043e \u00ab\u043d\u0430\u0441\u043b\u0435\u0434\u043d\u0438\u043a\u0435\u00bb FB3. \/ Flickr \/ Judit Klein \/ CC \u041f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u0412 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 90-\u0445 \u0433\u043e\u0434\u043e\u0432 \u044d\u043d\u0442\u0443\u0437\u0438\u0430\u0441\u0442\u044b \u043d\u0430\u0447\u0430\u043b\u0438 \u043e\u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0432\u0430\u0442\u044c \u0441\u043e\u0432\u0435\u0442\u0441\u043a\u0438\u0435 \u043a\u043d\u0438\u0433\u0438. \u041e\u043d\u0438 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0438\u043b\u0438 \u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u043b\u0438 \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0443 \u0432 \u0441\u0430\u043c\u044b\u0445 \u0440\u0430\u0437\u043d\u043e\u043e\u0431\u0440\u0430\u0437\u043d\u044b\u0445 \u0444\u043e\u0440\u043c\u0430\u0442\u0430\u0445. \u041e\u0434\u043d\u0430 \u0438\u0437 \u043f\u0435\u0440\u0432\u044b\u0445 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a 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