昨天哈佛大学发布了其图书馆元数据(约1200万条)的开放获取
我想解析这些数据并与之交互,因为此次发布的目标是“支持创新”
下载12GB的压缩包并解压后找到13个.mrc文件,每个文件大小约800MB
当我查看前几个文件的头部和尾部时,即使阅读了一些有关MARC21的信息,它似乎也非常不规则。
以下是第一个文件前4k的内容:
$ head -c 4000 ab.bib.00.20120331.full.mrc
00857nam a2200253 a 4500001001200000005001700012008004100029010001700070020001200087035001600099040001800115043001200133050002500145245011100170260004900281300002100330504004100351610006400392650005300456650003500509700003800544988001300582906000800595002000001-420020606093309.7880822s1985 unr b 000 0 ruso a 86231326 c0.45rub0 aocm18463285 aDLCcDLCdHLS ae-ur-un0 aJN6639.A8bK665 198500aInformat︠s︡ii︠a︡ v rabote partiĭnykh komitetov /c[sostavitelʹ Stepan Ivanovich I︠A︡lovega]. aKiev :bIzd-vo polit. lit-ry Ukrainy,c1985. a206 p. ;c20 cm. aIncludes bibliographical references.20aKomunistychna partii︠a︡ UkraïnyxInformation services. 0aParty committeeszUkrainexInformation services. 0aInformation serviceszUkraine.1 aI︠A︡lovega, Stepan Ivanovich. a20020608 0DLC00418nam a22001335u 4500001001200000005001700012008004100029110003000070245004600100260006000146500005800206988001300264906000700277002000002-220020606093309.7900925|1944 mx |||||||spa|d1 aCampeche (Mexico : State)10aLey del notariado del estado de Campeche.0 a[Campeche]bDepartamento de prensa y publicidad,c1944. aAt head of title: Gobierno constitucional del estado. a20020608 0MH00647nam a2200229M 4500001001200000005001700012008004100029010001700070035001600087040001300103041001100116050003600127100004200163245004100205246005600246260001600302300001900318500001500337650004400352988001300396906000800409002000003-020051201172535.0890331s1902 xx d 000 0 ota a 73960310 0 aocm23499219 aDLCcEYM0 aotaara0 aPJ6636.T8bU5 1973 (Orien Arab)1 aUnsī, Muḥammad ʻAlī ibn Ḥasan.10aQāmūs al-lughah al-ʻUthmānīyah.3 aDarārī al-lāmiʻāt fī muntakhabāt al-lughāt. c[1902 1973] a564 p.c22 cm. aRomanized. 0aTurkish languagevDictionariesxArabic. a20020608 0DLC00878nam a2200253 a 4500001001200000005001700012008004100029010001700070035001600087040001800103043001200121050002300133245012800156246004600284260006300330300004800393500003300441610003200474650005000506700002400556710002300580988001300603906000800616002000004-920020606093309.7880404s1980 yu fa 000 0 scco a 82167322 0 aocm17880048 aDLCcDLCdHLS ae-yu---0 aL53.P783bT75 198000aTrideset pet godina Prosvetnog pregleda, 1945-1980 /c[glavni i odgovorni urednik i urednik publikacije Ružica Petrović].3 a35 godina Prosvetnog pregleda, 1945-1980. aBeograd :bNovinska organizacija Prosvetni pregled,c1980. a146 p., [21] p. of plates :bill. ;c29 cm. aIn Serbo-Croatian (Cyrillic)20aProsvetni pregledxHistory. 0aEducationzYugoslaviaxHistoryy20th century.1 aPetrović, Ružica.2 aProsvetni pregled. a20020608 0DLC00449nam a22001455u 4500001001200000005001700012008004100029245008200070260002800152300001100180440006600191700002600257988001300283906000700296002000005-720020606093309.7900925|1981 pl |||||||pol|d10aZ zagadnień dialektyki i świadomości społecznej /cpod red. K. Ślęczka.0 aKatowice :bUŚ,c1981. a135 p. 0aPrace naukowe Uniwersytetu Śląskiego w Katowicach ;vnr 4621 aŚlęczka, Kazimierz. a20020608 0MH00331nam a22001455u 4500001001200000005001700012008004100029100002200070245002200092250001200114260002800126300001100154988001300165906000700178002000006-520020606093309.7900925|1980 pl |||||||pol|d1 aMencwel, Andrzej.10aWidziane z dołu. aWyd. 1.0 aWarszawa :bPIW,c1980. a166 p. a20020608 0MH00746cam a2200241 a 4500001001200000005001700012008004100029010001700070020001500087035001600102040001800118050002400136082001600160100001600176245008000192260007100272300002500343504004100368650003400409650004000443988001300483906000800496002000007-300000000000000.0900123s1990 enk b 001 0 eng a 90031350 a03910368230 aocm21081069 aDLCcDLCdHBS00aHF5439.8b.O35 199
有人曾经使用过MARC21吗?它通常是这样的吗,还是我需要以不同方式解析它。