Property talk:P212

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identifier for a book (edition), thirteen digit
RepresentsInternational Standard Book Number (Q33057)
Data typeExternal identifier
According to this template: version, edition, or translation (Q3331189) single edition of a book
According to statements in the property:
version, edition, or translation (Q3331189), doctoral thesis (Q187685) and book (Q571)
When possible, data should only be stored as statements
Allowed values
According to this template: 13 digits, grouped in blocks separated by dashes
According to statements in the property:
When possible, data should only be stored as statements
ExampleLa Fraternité de l'Anneau (Q22137041)978-2-26-702700-6 (RDF)
Dolle mythes : een frisse factcheck van feminisme toen en nu (Q63888904)978-94-6298-380-9 (RDF)
Format and edit filter validationAbuse filter #83
Formatter URL$1
Formatter URNurn:isbn:$1List of Uniform Resource Names (URN)
Tracking: usageCategory:Pages using Wikidata property P212 (Q23909095)
See alsoISBN-10 (P957), ISBN publisher prefix (P3035), ISBN identifier group (P3097), Depósito Legal ID (P6164), Open Library ID (P648), OCLC work ID (P5331), OCLC control number (P243)
Proposal discussionProposal discussion
Current uses58,872
Search for values
[create Create a translatable help page (preferably in English) for this property to be included here]
Distinct values: this property likely contains a value that is different from all other items. (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#Unique value, SPARQL (every item), SPARQL (by value), SPARQL (new)
Single value: this property generally contains a single value. (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#Single value, SPARQL, SPARQL (new)
Type “version, edition, or translation (Q3331189), doctoral thesis (Q187685), book (Q571): element must contain property “instance of (P31)” with classes “version, edition, or translation (Q3331189), doctoral thesis (Q187685), book (Q571)” or their subclasses (defined using subclass of (P279)). (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#type Q3331189, Q187685, Q571, SPARQL, SPARQL (new)
Qualifiers “distribution format (P437), language of work or name (P407), applies to part (P518), publisher (P123), volume (P478), reason for deprecation (P2241), reason for preferred rank (P7452): this property should be used only with the listed qualifiers. (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#Allowed qualifiers, SPARQL, SPARQL (new)
Format “97[89]-([0-57]-(\d-\d{7}|\d\d-\d{6}|\d\d\d-\d{5}|\d{4}-\d{4}|\d{5}-\d\d\d|\d{6}-\d\d|\d{7}-\d)|[89]\d-(\d-\d{6}|\d\d-\d{5}|\d\d\d-\d{4}|\d{4}-\d\d\d|\d{5}-\d\d|\d{6}-\d)|[69]\d\d-(\d-\d{5}|\d\d-\d{4}|\d\d\d-\d\d\d|\d{4}-\d\d|\d{5}-\d)|99[0-8]\d-\d-\d{4}|99[0-8]\d-\d\d-\d\d\d|99[0-8]\d-\d\d\d-\d\d|99[0-8]\d-\d{4}-\d|999\d\d-\d-\d\d\d|999\d\d-\d\d-\d\d|999\d\d-\d\d\d-\d)-\d|: value must be formatted using this pattern (PCRE syntax). (Help)
Exceptions are possible as rare values may exist. Known exceptions: Pepper ha Carrot (Q54514916)
List of this constraint violations: Database reports/Constraint violations/P212#Format, SPARQL, SPARQL (new)
Scope is as main value (Q54828448), as references (Q54828450), as qualifiers (Q54828449): the property must be used by specified way only (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#scope, SPARQL, SPARQL (new)
Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#allowed entity types, SPARQL (new)
Conflicts with “instance of (P31): human (Q5): this property must not be used with the listed properties and values. (Help)
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P212#Conflicts with P31, search, SPARQL, SPARQL (new)
Pictogram voting comment.svg Invalid ISBN-13
ISBN-13 that have wrong checksum (Help)
Violations query: SELECT ?item ?value { { ?item wdt:P212 ?value } UNION { ?statement pq:P212 ?value . ?item ?p ?statement . ?prop wikibase:claim ?p } UNION { ?ref pr:P212 ?value . ?statement prov:wasDerivedFrom ?ref . ?item ?p ?statement . ?prop wikibase:claim ?p } . BIND(REPLACE(STR(?value), "-", "") AS ?nohyphen) . FILTER(STRLEN(?nohyphen) = 13) . BIND(xsd:integer(SUBSTR(?nohyphen, 1, 1)) + xsd:integer(SUBSTR(?nohyphen, 2, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 3, 1)) + xsd:integer(SUBSTR(?nohyphen, 4, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 5, 1)) + xsd:integer(SUBSTR(?nohyphen, 6, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 7, 1)) + xsd:integer(SUBSTR(?nohyphen, 8, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 9, 1)) + xsd:integer(SUBSTR(?nohyphen, 10, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 11, 1)) + xsd:integer(SUBSTR(?nohyphen, 12, 1)) * 3 + xsd:integer(SUBSTR(?nohyphen, 13, 1)) AS ?checksum) . FILTER(FLOOR(?checksum / 10) != (?checksum / 10)) } ORDER BY ?nohyphen
List of this constraint violations: Database reports/Complex constraint violations/P212#Invalid ISBN-13
Pattern ^(ISBN *)?(\d{1,5}-\d{1,7}-\d{1,6}-[\dX]|\d{9}[\dX])$ will be automatically replaced to \2 and moved to ISBN-10 (P957) property.
Testing: TODO list

Pattern ^ISBN *([0-9-]{13,17})$ will be automatically replaced to \1.
Testing: TODO list

This property is being used by:

Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

ISBN 13 ?[edit]

There are several ISBN format (10 digits, 13 digits). Shouldn't we have several properties as well ? Or maybe we just want to have the more recent 13 digit format, but in that case, it should be indicated in the description. --Zolo (talk) 09:35, 7 March 2013 (UTC)

✓ Done Let's start with ISBN-13. --Kolja21 (talk) 22:09, 7 March 2013 (UTC)
On the long run we might need a property "ISBN-10", but for now we can use ISBN-13 Online Converter for older numbers. --Kolja21 (talk) 22:22, 7 March 2013 (UTC)

How are we supposed to handle multiple translations of a book? The list of properties provides the example <The God Delusion> ISBN-13 <978-0-618-68000-9>. This makes perfect sense in English but Wikidata is multilingual and this ISBN is not the one of Pour en finir avec Dieu (French translation), Der Gotteswahn (German translation) or El espejismo de Dios (Spanish translation). If we include all of them, then it's impossible for readers to determine which ISBN corresponds to what. I'd be in favour of restricting this property to the ISBN of the original edition in the original language. Pichpich (talk) 19:28, 27 March 2013 (UTC)

I think having an item for each edition (Wikidata talk:Notability#Books), though it would not solve the problem of the ISBN of the main item. I guess the main item shuold have the ISBN of the original edition, and we some Lua Module could probably find the ISBN for the translation. --Zolo (talk) 21:28, 27 March 2013 (UTC)
okay, this is ISBN-13 now. but shouldn't there also be ISBN-10 as well? --Shisma (talk) 16:55, 28 March 2013 (UTC)
ISBN-10 is not on Wikidata:Property proposal but I think it's uncontroversial. See also: Wikidata:Books task force. --Kolja21 (talk) 00:38, 29 March 2013 (UTC)
I agree with Kolja21, we should have a page for each book, with is "national" ISBN. I agre we should also have a ISBN-10, just in case.
Still, we need to discuss relations between books. Please join the discussion here. --Aubrey (talk) 10:56, 29 March 2013 (UTC)
I think that this property should be valid both ISBN-10 and ISBN-13 (changing the constraints), and that is should be renamed to "ISBN". The reasons for this is that if we want the ISBN to used in creating URIs to other websites, those websites typically handle both ISBN-10 and -13. This would also avoid confusionn in trying to do reverse lookups in Wikidata by ISBN, when that functionality arrives later. Maximilianklein (talk) 21:50, 10 September 2013 (UTC)
@Kolja21:, @Zolo:, @Shisma:, @Aubrey:, we seem to be in agreement at least that we should start supporting ISBN-10, either by allowing this property to support both or to make another property. I would like to come to a consensus, and preferably to make this property support both 10 and 13, because I am ready to harvest Infobox Book. Any objections? Maximilianklein (talk) 19:20, 7 October 2013 (UTC)
Using this property for both types of ISBN is fine with me, but then I do not know how other websites manage ISBN either. --Zolo (talk) 20:13, 7 October 2013 (UTC)
This discussion was open for a week and I pinged all relevant parties for comment, of the one respondent, there was agreement. I believe this is consensus. @Akkakk: can you update the regex checker to support both 10 and 13 digit variants? 21:23, 14 October 2013 (UTC)
I think it's better to create a new property ISBN 10, see Wikidata:Property proposal/Creative work#ISBN-10. It's easier to handle, avoids chaos and helps with the clean up. --Kolja21 (talk) 23:58, 14 October 2013 (UTC)
Et voilà: ISBN-10 (P957) --Kolja21 (talk) 16:29, 15 October 2013 (UTC)
@Kolja21: Can you please explain what you mean by "avoids chaos and helps with the clean up"? As for clean up, it seems like the regex here could be formatted so that only either a clean ISBN10 or ISBN13 could exist. As for avoids chaos, since ISBN10s can be converted to ISBN13s, it would be possible when having two distinct properties, that an item has two claims a ISBN-10 (P957) and a ISBN-13 (P212) and they would be really representing the same underlying edition. Maximilianklein (talk) 19:11, 17 October 2013 (UTC)
With "chaos" I refer to the number of "format" violations on WD:Database reports (violations count: more than 1000). Since bots and humans edit WD, it seems at least helpful for the humans that there is the ten digit variant. I don't mind if ISBN-10 (P957) stays empty and a bot converts the numbers into ISBN-13. (BTW: Sorry, that I've not replied earlier, but the Notifications system has not yet been deployed to Wikidata.) --Kolja21 (talk) 21:44, 17 October 2013 (UTC)

ISBN for different languages and formats[edit]

The ISBN numbers are different for every language version of a book, and I have worked on book templates on Swedish Wikipedia and we have the possibility to add ISBN number for:

  • The original book
  • The paperback version
  • The audiobook on CD
  • The audio book on MP3-CD
  • The E-book
  • Downloadable MP3 audiobook

And that is only the ISBN-numbers for the Swedish versions.

How do we solve this? I personally think that this is a database that should be filled with data, so should we make properties for Swedish paperback version, English paperback version, Norwegian paperback version, Swedish MP3-CD version, English MP3-CD version, and so on? /abbedabbtalk 13:30, 30 March 2013 (UTC)

Right now we have no single edition books in Wikidata. We only have works. So strictly speaking the ISBN should be the ISBN of the first edition. We still have a long way to go before we can use Wikidata as a bibliography, see: Wikidata:Books task force. --Kolja21 (talk) 13:53, 30 March 2013 (UTC)
Seconded and Wikidata:List of properties should be updated to make it clear that we don't want multiple ISBNs for a single work. Pichpich (talk) 16:53, 30 March 2013 (UTC)
I've added the single value constraint to the property to indicate that there should only be one value. It will be possible to see how many items violate this rule here. 08:14, 7 June 2013 (UTC)
I don't see why there shouldn't be multiple ISBN values. Why select a single one? If yes, which one? --  Docu  at 19:48, 7 June 2013 (UTC)
  • For the main book item the ISBN number is the number for the first edition.
  • Where an item is for a particular edition then the ISBN number is for that edition.
  • Where the main book item uses the edition number (P393) property to list other editions (rather than giving them separate items) then use the ISBN-13 (P212) property as a qualifier to give the ISBN number for that edition. Filceolaire (talk) 22:04, 9 September 2013 (UTC)

In case of conference proceedings or journals, usually there are printed and electronic version of the same work, sometimes CD versions as well, with their own ISBN number. These are completely the same works, only the format (and the price) are different. Are you sure that we should create multiple bibliographic items for each formats? Wouldn't be better to define the ISBN numbers for the item with qualifiers, like print/electronic/e-book/cd etc. Samat (talk) 13:13, 14 December 2017 (UTC)

@Samat: At the English Wikipedia, the practice is to SAYWHEREYOUGOTIT. If you found something in a specific edition, that is what you cite, not the first, nor the latest. You don't presume all formats or editions are equivalent: some national editions of books may be varied silently by their publishers to suit local sensibilities, politics, or tastes. One might also have a single consistent text with numerous applicable ISBNs simply for marketing/distribution reasons. We can't really second-guess all the variations. LeadSongDog (talk) 21:28, 9 August 2018 (UTC)

format constraint[edit]

the new format constraint pattern will assure that there are four dashes in the string. --Akkakk 01:10, 8 June 2013 (UTC)

changed according to de:ISBN-Gruppennummer --Akkakk 15:34, 19 August 2013 (UTC)
@Akkakk: Can you please change the format constraint to allow for the sequence "[\d]{3}\-[\d]{9}[\dxX]". That is three numbers a dash and then 10 numbers or a terminal X. It is a valid form, see this amazon book for instance but shows as an error in the constraint violation report. Maximilianklein (talk) 18:40, 5 November 2013 (UTC)
@Maximilianklein: Amazon as a source? You're kidding. Open Library is full of Amazon records, one more horrible than the other. We should at least keep a minimum of scientific standards. I would delete all numbers that have been taken from there. --Kolja21 (talk) 20:43, 5 November 2013 (UTC)
@Kolja21: I'm not saying that we should use Amazon or Open Library or any bad data as sources. I'm saying that 3digits-dash-10digits should be a valid P212 format. Maximilianklein (talk) 06:10, 6 November 2013 (UTC)
@Maximilianklein: Of cause their are all kind of ways people and companies note the ISBN. But imho WD should use the official form. Why? Because "99921-58-10-7" provides the reader with the information that the ISBN is from Qatar. If you write the number without hyphens "9992158107" or like Amazon "978-9992158104" the ISBN still works but with disadvantages for the human reader. --Kolja21 (talk) 10:41, 6 November 2013 (UTC)


there is in my understanding no officially preferred presentation of the ISBN according to the standard. Therefore I changed the English label to not need to mention hyphenation. Maximilianklein (talk) 22:35, 24 October 2013 (UTC)

That's sad. A computer don't care but human readers need the hyphens. I really think we should change the way of working. Right now WD imports to many data without control. If there are inconsistencies we lower the standards. We should use WD to improve the quality, instead of producing low quality duplicates. --Kolja21 (talk) 22:57, 24 October 2013 (UTC)
I agree we should aim for high quality. Maybe getting there takes a while. Maybe you start with an unhyphenated number, and then later someone comes and hyphenates it. Maximilianklein (talk) 18:37, 5 November 2013 (UTC)


Time has passed. Do we have a consensus on how ISBN-13s should be formatted? If we do, a bot can carry out the necessary changes. Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 19:52, 27 August 2016 (UTC)

@Pigsonthewing: The number to be stored is a 9-, 10- or bookland 13-digit integer, represented as strings. Any of the many forms of string in which it is acquired should be acceptable if it has the nine correct numerical digits, but the hyphens/dashes/spaces/whatever should be stripped out for storage. If a check-digit (vice "X") is provided, it should be validated and stored. If it is wrong, some form of exception handling is obviously needed. The correctness of the ISBN should be validated using queries to trustworthy repositories: surprisingly often an ISBN has multiple referents, rules notwithstanding, and sometimes a preliminary ISBN is used without the referent book being subsequently published. The ISBN-10 and ISBN-13 presentation format for easy human reading is a separate matter that may vary between users. I'd suggest just picking the presentation format called for in the standard, but others may disagree. I would think the bot role should be simply in putting those resultant formatted strings into citations in a way that is acceptable to the various projects' users. LeadSongDog (talk) 21:15, 9 August 2018 (UTC)
The question was "Do we have a consensus..?" Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 23:01, 10 August 2018 (UTC)

Note: my bot now inserts hyphens. So you can add data in digits-only format, its will be fixed automatically. — Ivan A. Krestinin (talk) 21:24, 9 August 2018 (UTC)

Format question[edit]

Please see Wikidata:Request_a_query#Query_to_extract_Wikipedia_article_content_based_on_a_list_of_ISBNs.
--- Jura 06:58, 27 June 2018 (UTC)

this page is now at Wikidata:Request_a_query/Archive/2018/06#Query_to_extract_Wikipedia_article_content_based_on_a_list_of_ISBNs --Shisma (talk) 14:40, 1 March 2020 (UTC)

Potential issue[edit]

I added an ISBN-13 identifier for an instance of a book (Q60884133). The ISBN-13 statement shows a "Potential issues" warning: "conflicts-with constraint / An entity should not have a statement for ISBN-13 if it also has a statement for instance of with value book." Why is this happening? --Robert.Allen (talk) 04:39, 1 February 2019 (UTC)

A separate item should be created for the version, edition, or translation (Q3331189), and the ISBN should be added there. A book may have several editions with different ISBNs. —Tacsipacsi (talk) 21:31, 1 February 2019 (UTC)
So this means that all books with only one edition have to have two Wikidata items? --Robert.Allen (talk) 02:51, 2 February 2019 (UTC)
Yep, that’s the theory. To be honest, I don’t do this either, just ignore these warnings. If someone wants to be super precise, let them do this separation, but it really seems to be an overkill for one-edition books. The constraint, however, seems to be good for me: this is really a pontential issue, although not a certain one: many works have more than one edition, where the separation absolutely makes sense. —Tacsipacsi (talk) 14:05, 2 February 2019 (UTC)
Thanks taking the time to respond. I understand much better now, and I think I completely agree with you. Best, --Robert.Allen (talk) 14:25, 3 February 2019 (UTC)
Another thing to remember is that it is not just physical books (hard back, trade paperback etc) which produce different editions for books. Audiobooks and ebooks are also different editions of a book and can have ISBNs assigned to them. David Newton (talk) 14:40, 24 August 2019 (UTC)

Multiple ISBN in one book[edit]

Hi, we have books, which have multiple ISBNs: e.g. Hazardní hráč (Q65144202). Could we remove "distinct values constraint" constraint? Skim (talk) 14:09, 8 July 2019 (UTC)

No you don't, at least from the point of view of a "book" on Wikidata. ISBNs are assigned to individual editions of a book. If the book changes publisher that's potentially a new edition and thus new ISBN. If a book is translated that's certainly a new edition and thus a new ISBN. David Newton (talk) 14:42, 24 August 2019 (UTC)
@David Newton: Hi David. This is not case when we have one edition from one publisher and second edition from second publisher. This is real situation on which one book has two ISBNs, because book was published by two publishing houses at time. See Hazardní hráč (Q65144202) and link in NKCR. This is common thing in some books in the Czech Republic. In citing template on Czech Wikipedia is parameter isbn and isbn2 Skim (talk) 20:09, 26 March 2020 (UTC)
Well then that's two separate editions of the book, each edition having its own ISBN which exactly corresponds with what I said. David Newton (talk) 09:39, 27 March 2020 (UTC)

proceedings constraint[edit]

Hi, The allowable item type constraint for ISBN-13 should include Q1143604 (proceedings) - as these are individual publications that sometimes have ISBNS (sometimes ISSNs and sometimes both). -- Phoebe (talk) 10:42, 15 August 2019 (UTC)

Do you have an example? Perhaps you've mixed work and edition? --Kolja21 (talk) 15:49, 24 August 2019 (UTC)


This property (and others that are about ISBN codes) should not use hyphens. Check the official ISBN documents: hyphens (or spaces!) are used only when ISBN have to be displayed in human-readable form. Using it in databases are not only unneeded, but may be a hindrance for end-users. The end-user should decide which form of presentation (raw, hyphens, spaces) is needed. Wostr (talk) 20:33, 17 January 2020 (UTC)

Issue in ISBN in some books in the Czech Republic[edit]

Hi. Some books has bad ISBN on real book. And National library of the Czech Republic has this ISBN with addon "Bad ISBN" on book record. And there is another ISBN, which is right. But not published on real book. e.g. book Džihád - "80-86218-99-6 (váz.) * 80-86518-99-6 (chybné)". Could we somehow add these both ISBNs to book record and add some property for definition of correctness? Motive is simple. Some people don't know that ISBN on book is bad. e.g. my changes in. What do you mean? Skim (talk) 20:19, 26 March 2020 (UTC)

Constraints changed[edit]

User:Adamant.pwn and User:Haansn08 have changed the constraints a few days ago so that this can also be applied to book (Q571) and written work (Q47461344). Has there been any discussion about this? If not I'd revert the change. Editions have ISBNs, works do not. And there is no reason why the constraints of ISBN-10 and ISBN-13 should be different from each other. -- Discostu (talk) 20:50, 27 April 2020 (UTC)

Where am I supposed to place ISBN if the book only has one edition? Should I create a separate entity for it? Adamant.pwn (talk) 21:02, 27 April 2020 (UTC)
There has been no discussion I know of. Is there any guide for how to deal with the large number of items which are neither version, edition, or translation (Q3331189) nor doctoral thesis (Q187685) but do have a ISBN-13 (P212) statement? It seems to me many are a written work (Q47461344) (including book (Q571)). -- Haansn08 (talk) 23:42, 27 April 2020 (UTC)

There are many possibilities how to tackle this. I think this should be discussed with the WikiProject:Books Aubrey
Viswaprabha (talk)
Maximilianklein (talk)
Jane023 (talk) 08:21, 30 May 2013 (UTC)
Alexander Doria (talk)
Ruud 23:15, 24 June 2013 (UTC)
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Yann (talk)
John Vandenberg (talk) 09:14, 30 November 2013 (UTC)
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PKM (talk) 19:58, 10 October 2014 (UTC)
Revi 16:54, 29 November 2014 (UTC)
Giftzwerg 88 (talk) 23:36, 1 January 2015 (UTC)
Almondega (talk) 00:17, 5 August 2015 (UTC)
Jura to help sort out issues with other projects
Skim (talk) 13:52, 24 June 2016 (UTC)
Marchitelli (talk) 12:29, 5 August 2016 (UTC)
Alexmar983 (talk) 23:53, 28 August 2016 (UTC)
Finn Årup Nielsen (fnielsen) (talk) 10:44, 29 August 2016 (UTC)
Chiara (talk) 14:15, 29 August 2016 (UTC)
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Shilonite - specialize in cataloging Jewish & Hebrew books
Elena moz
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Maria zaos (talk) 11:39, 25 March 2018 (UTC)
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Mfchris84 (talk) 10:08, 27 April 2018 (UTC)
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salgo60 Salgo60 (talk) 12:42, 8 May 2018 (UTC)
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Merrilee (talk) 22:14, 29 November 2018 (UTC)
Kcoyle (talk) 22:17, 29 November 2018 (UTC)
JohnMarkOckerbloom (talk) 22:58, 29 November 2018 (UTC)
Tris T7 TT me
Helmoony (talk) 19:49, 8 December 2018 (UTC)
Shooke (talk) 19:17, 12 January 2019 (UTC)
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I am Davidzdh. 16:08, 18 February 2019 (UTC)
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Buccalon (talk) 15:51, 27 March 2019 (UTC)
MJLTalk 16:48, 8 April 2019 (UTC)
Rosiestep (talk) 20:26, 24 April 2019 (UTC)
Dcflyer (talk) 12:23, 7 May 2019 (UTC)
Susanna Giaccai (talk) 05:56, 29 July 2019 (UTC)
Asaf Bartov (talk) 19:03, 31 July 2019 (UTC)
Msuicat (talk) 17:58, 6 August 2019 (UTC)
SilentSpike (talk) 15:27, 12 August 2019 (UTC)
TheFireBender (talk) 12:40, 20 August 2019 (UTC)
Jumtist (talk) 21:45, 22 October 2019 (UTC)
DrLibraryCat (talk) 18:25, 25 November 2019 (UTC)
ShawnMichael100 (talk) 20:04, 25 November 2019 (UTC)
Lmbarrier (talk) 19:47, 2 December 2019 (UTC)
Satpal Dandiwal (talk) 17:32, 16 December 2019 (UTC)
Rosiestep (talk) 17:08, 14 February 2020 (UTC)
Clifford Anderson (talk) 01:37, 1 April 2020 (UTC)
Discostu (talk) 09:02, 9 April 2020 (UTC)
Subodh (talk)
Iwan.Aucamp (talk) 14:02, 27 April 2020 (UTC)
Алексей Скрипник (talk) 15:31, 4 May 2020 (UTC)
MLeonStewart (talk) 18:04, 11 May 2020 (UTC)
ArielBritoJiménez (talk) 16:17, 31 May 2020 (UTC)
Pictogram voting comment.svg Notified participants of WikiProject Books -- Discostu (talk) 10:41, 28 April 2020 (UTC)

There is now a discussion about this at the WikiProject. -- Discostu (talk) 06:54, 13 May 2020 (UTC)

Search with SPARQL[edit]

Code to post at (or a subpage thereof) if you want

SELECT ?isbn ?statement WHERE {
   ?statement prov:wasDerivedFrom ?ref . 
   ?ref pr:P212 ?isbn .
   FILTER (CONTAINS(lcase(?isbn), lcase("$1")))

Replace $1 with the ISBN-13. Try it at ("$1"="%241")

I tried the above search (in the "Documentation" section I think) "haswbstatement:P212=978-2-26-702700-6" -, and it failed 2 of 2 times (one of the times I used an ISBN that I know is on a Wikidata page). Therefore, I made this query. --User123o987name (talk) 08:01, 28 May 2020 (UTC)

Update: I don't know how to make a unified search for $3, where $3 is "ISBN-10 OR ISBN-13", aside from

SELECT ?isbn10 ?isbn13 ?statement WHERE {
   ?statement prov:wasDerivedFrom ?ref .
   ?ref pr:P957 ?isbn10 .
   FILTER (CONTAINS(lcase(?isbn10), lcase("$1")))
   ?statement prov:wasDerivedFrom ?ref . 
   ?ref pr:P212 ?isbn13 .
   FILTER (CONTAINS(lcase(?isbn13), lcase("$2")))

where you have to comment out lines 2-4 to search for ISBN-13 and comment out lines 5-7 if you want to search for ISBN-10. I tried the search thing for ISBN-10 -- ("haswbstatement:P957=0-521-22151-X") -- and it worked 2 out of 2 times, but here is a SPARQL version of the ISBN10 search:

If you make a SPARQL query to search for $3, post it at --User123o987name (talk) 08:42, 28 May 2020 (UTC)

Regular expression[edit]

\d\d\d is the same as \d{3}, so could be update the regular expression to say:

Instead of what it currently is: 97[89]-([0-57]-(\d-\d{7}|\d\d-\d{6}|\d\d\d-\d{5}|\d{4}-\d{4}|\d{5}-\d\d\d|\d{6}-\d\d|\d{7}-\d)|[89]\d-(\d-\d{6}|\d\d-\d{5}|\d\d\d-\d{4}|\d{4}-\d\d\d|\d{5}-\d\d|\d{6}-\d)|[69]\d\d-(\d-\d{5}|\d\d-\d{4}|\d\d\d-\d\d\d|\d{4}-\d\d|\d{5}-\d)|99[0-8]\d-\d-\d{4}|99[0-8]\d-\d\d-\d\d\d|99[0-8]\d-\d\d\d-\d\d|99[0-8]\d-\d{4}-\d|999\d\d-\d-\d\d\d|999\d\d-\d\d-\d\d|999\d\d-\d\d\d-\d)-\d|

Noticed this when working on --User123o987name (talk) 20:22, 29 May 2020 (UTC)