User:LA2/ISBN stats 2007
< User:LA2
This pages started out as a section of user:LA2/Extraktor stats 200709.
A selection of north European languages are measured.
Somewhere between 1 and 2 percent of all ISBNs in Wikipedia tend to be outright bad. Apparently, nobody is watching this, since a small manual effort could correct the problem.
Even when the ISBN looks good, it could of course be an ISBN for another book, or the book might be a bad reference source. And a lot of articles lack sources. But that is a much larger problem, that isn't addressed here.
Some ISBNs use spaces where hyphens are recommended, or put the hyphens in the wrong places, or just write 10 digits without any separation. These errors account for one third of all ISBNs in Wikipedia. The error is entirely cosmetic, and doesn't change the usefulness of the ISBN links. Automatic software (based on CPAN Perl module Business::ISBN) can detect these cases and suggest improvements. A bot could handle that.
| Download | Unique ISBNs | Unique article ISBNs[1] | Total ISBNs | OK | Bad hyphens |
Bad checksum[2] |
Bad number | Comment / Frequent errors | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Could be made prettier |
Should be fixed | |||||||||
| Czech | ||||||||||
| cswiki-20071111 | 4620 | 7773 | 2.5% | 7964 | 6850 | 86.0% | 917 | 95 | 102 | 23× ISBN 3871503655, 9× ISBN 3543166, 6× ISBN 230758701 |
| Danish | ||||||||||
| dawiki-20070905 | 3117 | 3844 | 2.3% | 3931 | 2730 | 69.4% | 1131 | 38 | 32 | 2 ISBN 091834635, 2 ISBN 04150255273 |
| dawiki-20070923 | 3273 | 4050 | 2.5% | 4150 | 2852 | 68.7% | 1222 | 40 | 36 | 2× ISBN 978-87-23-02421-6, 2× ISBN 89-601-6921-4, 2× ISBN 87-982957-8-3, 2× ISBN 8791822377, 2× ISBN 091834635, 2× ISBN 0-415-025527-3, 2× ISBN 0080249041 |
| dawiki-20071009 | 3376 | 4179 | 2.3% | 4276 | 4174 | 97.6% | 67[3] | 23 | 12 | 2× ISBN 8960169214, 2× ISBN 04150255273, 2× ISBN 0080249041 |
| dawiki-20071111 | 3594 | 4524 | 2.2% | 4624 | 4541 | 98.2% | 72 | 8 | 3 | 2× ISBN 0080249041, 1× ISBN 978142620089, 1× ISBN 8757670235 |
| German | ||||||||||
| dewiki-20070922 | 155727 | 234809 | 1.8% | 239123 | 172715 | 72.2% | 65941 | 278 | 189 | 9× ISBN 3632038942, 8× ISBN 3806729144, 4× ISBN 3598240217 |
| dewiki-20071009 | 158233 | 239249 | 1.8% | 243645 | 178352 | 73.2% | 64772 | 294 | 227 | 10× ISBN 32750089191, 8× ISBN 3806729144, 4× ISBN 3910173044 |
| English | ||||||||||
| enwiki-20070908 | 197327 | 330714 | 5.8% | 349816 | 267262 | 76.4% | 77603 | 2657 | 2294 | 66× ISBN 00006388981, 61× ISBN 854670548, 52× ISBN 1859831012 |
| enwiki-20071018 | 206779 | 349833 | 6.0% | 370796 | 276743 | 74.6% | 88698 | 2900 | 2455 | 61× ISBN 854670548, 41× ISBN 9137087251, 32× ISBN 9958089028 |
| Estonian | ||||||||||
| etwiki-20070826 | 849 | 912 | 1.5% | 926 | 131 | 14.1% | 770 | 11 | 14 | 7 ISBN 123456789 (apparently an example) |
| etwiki-20070909 | 871 | 938 | 1.7% | 954 | 139 | 14.6% | 790 | 11 | 14 | These changes are before my corrections |
| etwiki-20070927 | 896 | 962 | 0.9% | 971 | 148 | 15.2% | 806 | 9 | 8 | 1× ISBN 019825437X, 1× ISBN 207037797, 1× ISBN 3884769423, |
| etwiki-20071012 | 914 | 983 | 0.9% | 992 | 962 | 97.0% | 13[3] | 9 | 8 | 1× ISBN 9985968734, 1× ISBN 9985886292, 1× ISBN 9985634505 |
| etwiki-20071117 | 956 | 1029 | 1.0% | 1039 | 1012 | 97.4% | 21 | 3 | 3 | 2× ISBN 9985, 1× ISBN 9985886292, 1× ISBN 5460005288 |
| Võro | ||||||||||
| fiu_vrowiki-20070903 | 0 | 0 | - | 0 | - | - | - | - | - | |
| fiu_vrowiki-20070921 | 0 | 0 | 0.0% | 0 | 0 | 0.0% | 0 | 0 | 0 | |
| fiu_vrowiki-20071102 | 8 | 8 | 12.5% | 9 | 8 | 88.9% | 1 | 0 | 0 | |
| Finnish | ||||||||||
| fiwiki-20070828 | 7657 | 13389 | 12.8% | 15108 | 12445 | 82.4% | 2201 | 172 | 290 | 52 ISBN 08785810730 (a book referenced in many articles, should be 07858...), 26 ISBN 01401 (a book referenced in many articles, happened to have a period in the ISBN), 10 ISBN 951, 8 ISBN 952 (long ndash – was used instead of ASCII hyphen in 22 places in 6 articles), 7 ISBN 95110927166, 6 ISBN 95193810203, 4 ISBN 978952919576, 4 ISBN 978, 4 ISBN 07835892, 4 ISBN 0356665X (the last two might be ISSNs) |
| fiwiki-20070912 | 7816 | 13757 | 13.2% | 15578 | 12981 | 83.3% | 2225 | 185 | 187 | 30 951-26-0950-7, 11 951-31-2507-8, 7 951-109-2716-6, 6 951-9381-02-03, 6 3449501236, 5 951-1952-74-1, 5 951-0-19113-3 |
| fiwiki-20070928 | 8062 | 14288 | 13.6% | 16235 | 13663 | 84.2% | 2261 | 146 | 165 | 11× ISBN 9513125078, 7× ISBN 95110927166, 6× ISBN 3449501236 |
| fiwiki-20071013 | 8336 | 14843 | 14.0% | 16926 | 14448 | 85.4% | 2150 | 152 | 176 | 11× ISBN 9513125078, 7× ISBN 95110927166, 6× ISBN 3449501236 |
| fiwiki-20071119 | 8918 | 15962 | 10.5% | 17641 | 16438 | 93.2% | 916 | 172 | 115 | 8× ISBN 9510224846, 6× ISBN 3449501236, 5× ISBN 9521113917 |
| Faroese | ||||||||||
| fowiki-20070903 | 28 | 29 | 3.4% | 30 | 28 | 93.3% | - | 1 | 1 | |
| fowiki-20070921 | 28 | 29 | 3.4% | 30 | 29 | 96.7% | - | - | 1 | 1× ISBN 99918-49 (fo:Fannir) |
| fowiki-20071007 | 30 | 31 | 3.2% | 32 | 30 | 93.8% | 1 | 0 | 1 | 1× ISBN 9991849 |
| fowiki-20071102 | 29 | 30 | 3.3% | 31 | 31 | 100.0% | 0 | 0 | 0 | |
| Frisian | ||||||||||
| fywiki-20071007 | 68 | 69 | 0.0% | 69 | 35 | 50.7% | 32 | 2 | 0 | 1× ISBN 9074323891, 1× ISBN 9065500929 |
| fywiki-20071103 | 89 | 91 | 0.0% | 91 | 80 | 87.9% | 11 | 0 | 0 | |
| Icelandic | ||||||||||
| iswiki-20070905 | 505 | 631 | 1.3% | 639 | 185 | 29.0% | 434 | 1 | 19 | 7 ISBN 838253, 4 ISBN 997921306, 2 ISBN 123456789 |
| iswiki-20070922 | 517 | 662 | 1.2% | 670 | 210 | 31.3% | 448 | 1 | 11 | 7× ISBN 838253 (is:Rómversk-kaþólska kirkjan) |
| iswiki-20071009 | 518 | 663 | 0.9% | 669 | 655 | 97.9% | 5[3] | 1 | 8 | 4× ISBN 838253, 1× ISBN 87020172455, 1× ISBN 459284723 |
| iswiki-20071110 | 523 | 668 | 0.9% | 674 | 655 | 97.2% | 10 | 1 | 8 | 4× ISBN 838253, 1× ISBN 87020172455, 1× ISBN 459284723 |
| Lithuanian | ||||||||||
| ltwiki-20070828 | 668 | 751 | 2.8% | 772 | 548 | 71.0% | 203 | 9 | 12 | 2 ISBN 202009679 |
| ltwiki-20070912 | 673 | 761 | 2.8% | 782 | 574 | 73.4% | 205 | 2 | 1 | 9987-443-12-5 in lt:Jurgis Elisonas has bad checksum in LIBIS too. |
| ltwiki-20070928 | 683 | 774 | 2.6% | 794 | 703 | 88.5% | 87 | 3 | 1 | 1× ISBN 9987443121, 1× ISBN 5415008877, 1× ISBN 283160521 |
| ltwiki-20071013 | 738 | 840 | 2.4% | 860 | 837 | 97.3% | 19 | 3 | 1 | 1× ISBN 9987443121, 1× ISBN 5415008877, 1× ISBN 283160521 |
| ltwiki-20071119 | 781 | 909 | 2.4% | 931 | 920 | 98.8% | 5 | 5 | 1 | 1× ISBN 9987443121, 1× ISBN 5888340360, 1× ISBN 5415008877 |
| Latvian | ||||||||||
| lvwiki-20070823 | 89 | 122 | 1.6% | 124 | 97 | 78.2% | 25 | 1 | 1 | |
| lvwiki-20070923 | 92 | 125 | 1.6% | 127 | 99 | 78.0% | 26 | 1 | 1 | |
| lvwiki-20071010 | 95 | 128 | 1.6% | 130 | 128 | 98.5% | 0 | 1 | 1 | 1× ISBN 9187711406, 1× ISBN 38039007000 |
| lvwiki-20071113 | 100 | 134 | 1.5% | 136 | 133 | 97.8% | 1 | 1 | 1 | 1× ISBN 9187711406, 1× ISBN 38039007000 |
| Dutch | ||||||||||
| nlwiki-20071006 | 9518 | 13456 | 1.8% | 13702 | 6209 | 45.3% | 7111 | 208 | 174 | 16× ISBN 903660348, 15× ISBN 0213110138, 10× ISBN 9063782399 |
| nlwiki-20071104 | 10033 | 14183 | 2.4% | 14519 | 6638 | 45.7% | 7474 | 239 | 168 | 53× ISBN 9029240013, 16× ISBN 903660348, 12× ISBN 9063782399 |
| Norwegian (nynorsk) | ||||||||||
| nnwiki-20070825 | 1197 | 1343 | 1.4% | 1362 | 906 | 66.5% | 438 | 9 | 9 | 2 ISBN 38039007000 |
| nnwiki-20070924 | 1258 | 1410 | 1.3% | 1429 | 952 | 66.6% | 459 | 9 | 9 | 2× ISBN 38039007000 |
| nnwiki-20071011 | 1275 | 1430 | 1.1% | 1446 | 1417 | 98.0% | 27[3] | 0 | 2 | 1× ISBN 222, 1× ISBN 111 |
| nnwiki-20071114 | 1349 | 1517 | 1.1% | 1533 | 1521 | 99.2% | 9 | 0 | 3 | 1× ISBN 222, 1× ISBN 111, 1× ISBN 100861404564 |
| Norwegian (bokmål) | ||||||||||
| nowiki-20070829 | 7323 | 9477 | 3.0% | 9762 | 6408 | 65.6% | 3161 | 104 | 89 | 2 ISBN 15881125143, 2 ISBN 081560116, 2 ISBN 014101383 |
| nowiki-20070915 | 7537 | 9814 | 3.1% | 10115 | 6685 | 66.1% | 3280 | 87 | 63 | 2× ISBN 8283200165, 2× ISBN 8280349017, 2× ISBN 8277230259 |
| nowiki-20070930 | 7631 | 9997 | 3.1% | 10303 | 7057 | 68.5% | 3187 | 40 | 19 | 2× ISBN 8280349017, 2× ISBN 8202039166, 2× ISBN 8090110538 |
| nowiki-20071019 | 8008 | 10516 | 3.0% | 10829 | 10141 | 93.6% | 657[3] | 20 | 11 | 2× ISBN 8202039166, 2× ISBN 8090110538, 2× ISBN 012345678X |
| nowiki-20071127 | 8458 | 11268 | 3.1% | 11616 | 11442 | 98.5% | 132 | 24 | 18 | 4× ISBN 829913007, 2× ISBN 9788203191975, 2× ISBN 8829230143 |
| Polish | ||||||||||
| plwiki-20071002 | 10731 | 19917 | 3.2% | 20563 | 13904 | 67.6% | 6045 | 363 | 251 | 56× ISBN 8389648358, 20× ISBN 0878397990, 16× ISBN 8382017439 |
| plwiki-20071021 | 11474 | 21388 | 3.2% | 22063 | 17005 | 77.1% | 4463 | 331 | 264 | 20× ISBN 0878397990, 16× ISBN 8382017439, 12× ISBN 839033890041 |
| plwiki-20071129 | 12516 | 23963 | 3.4% | 24779 | 20898 | 84.3% | 3247 | 354 | 280 | 16× ISBN 8382017439, 12× ISBN 839033890041, 12× ISBN 838670350 |
| Russian | ||||||||||
| ruwiki-20070920 | 8613 | 12011 | 4.4% | 12544 | 9059 | 72.2% | 2911 | 281 | 293 | 19× ISBN 985, 15× ISBN 9667007604, 15× ISBN 575111930X |
| ruwiki-20071008 | 9049 | 12704 | 4.3% | 13253 | 9790 | 73.9% | 2971 | 301 | 191 | 15× ISBN 9667007604, 15× ISBN 575111930X, 15× ISBN 5420005833 |
| ruwiki-20071107 | 9610 | 13613 | 4.4% | 14215 | 12961 | 91.2% | 692[3] | 348 | 214 | 43× ISBN 5289016868, 15× ISBN 9667007604, 15× ISBN 575111930X |
| Sami | ||||||||||
| sewiki-20070826 | 6 | 7 | 0.0% | 7 | 7 | 100.0% | - | - | - | |
| sewiki-20070909 | 6 | 7 | 0.0% | 7 | 7 | 100.0% | - | - | - | |
| sewiki-20070927 | 6 | 7 | 0.0% | 7 | 7 | 100.0% | 0 | 0 | 0 | |
| sewiki-20071012 | 6 | 7 | 0.0% | 7 | 7 | 100.0% | 0 | 0 | 0 | |
| sewiki-20071116 | 6 | 7 | 0.0% | 7 | 7 | 100.0% | 0 | 0 | 0 | |
| Swedish | ||||||||||
| svwiki-20070831 | 6604 | 10322 | 4.2% | 10754 | 7511 | 69.8% | 3045 | 129 | 69 | 10 ISBN 91701841443, 3 ISBN 910405884, 3 ISBN 4704974X, 2 ISBN 19163199092, 2 ISBN 139780540082421 |
| svwiki-20070918 | 6980 | 10906 | 4.5% | 11398 | 8255 | 72.4% | 3068 | 69 | 6 | 3× ISBN 978-91-7073-223-3, 2x ISBN 9189447998, 2x ISBN 9171196388, 2x ISBN 9146201670, 2x ISBN 9100469292, 2x ISBN 0873403194, 2x ISBN 0226169231, 2x ISBN 0197191574, 2x ISBN 0081496004 |
| svwiki-20071001 | 7543 | 11627 | 2.8% | 11954 | 9054 | 75.7% | 2824 | 58 | 18 | 2× ISBN 9189447998, 2× ISBN 9171196388, 2× ISBN 9100469292 |
| svwiki-20071020 | 7900 | 12130 | 3.0% | 12496 | 12304 | 98.5% | 112[3] | 71 | 9 | 2× ISBN 9844830679, 2× ISBN 9189447998, 2× ISBN 9171196388 |
| svwiki-20071128 | 8554 | 12719 | 3.1% | 13115 | 12808 | 97.7% | 208 | 82 | 17 | 6× ISBN 01313110999, 2× ISBN 9914504906, 2× ISBN 9900205316 |
| Yiddish | ||||||||||
| yiwiki-20070829 | 1 | 1 | 0.0% | 1 | 1 | 100.0% | - | - | - | |
| yiwiki-20070921 | 1 | 1 | 0.0% | 1 | 1 | 100.0% | 0 | 0 | 0 | |
| yiwiki-20071017 | 1 | 1 | 0.0% | 1 | 1 | 100.0% | 0 | 0 | 0 | |
Footnotes
[edit]- ↑ If this is less then the total ISBNs, it's because the same ISBN is referenced multiple times in one article. The percentage indicates the redundancy.
- ↑ Any digit might be wrong, not necessarily the checksum digit.
- ↑ a b c d e f g This is after LA2-bot put hyphens in the right places on October 7-9, 2007