Wikidata:Property proposal/WorldCat Identities

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WorldCat Identities[edit]

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   Under discussion
Descriptiondetailed bibliographic info from WorldCat about an entity
RepresentsWorldCat Identities (Q76630151)
Data typeExternal identifier
Template parameterUsed in Template:Authority control/WORLDCAT-LCCN (Q14467416), Template:Worldcat id (Q11247300)
Domainperson, organization, place, work
Allowed values(viaf|lccn|np)-\w+
Example 1William Shakespeare (Q692)lccn-n78-95332
Example 2Guy Doly-Linaudière (Q55626014)viaf-100181709
Example 3Guillaume Caoursin (Q164470)lccn-n88603570
Example 4William Verbeck (Q76460081)np-verbeck,%20william$1861
Number of IDs in source
  • 8454581 Identities-lccn
  • 11464602 Identities-viaf
Expected completenesseventually complete (Q21873974)
Formatter URL$1/
Robot and gadget jobsimport from VIAF:
See alsoVIAF ID (P214), Library of Congress authority ID (P244), WorldCat Registry ID (P5505), FAST ID (P2163)


viaf-20191104-links has added links to WorldCat Identities, which are pages with detailed bibliographic info about the entity. These are based on LCCN or VIAF ids. But I don't think they can be derived systematically because not all entities have such pages. Eg a relatively unknown author like Example 2 has one, but Leonardo da Vinci (Q762) doesn't have one. Vladimir Alexiev (talk) 14:38, 27 November 2019 (UTC)


  • Symbol support vote.svg Support David (talk) 07:14, 28 November 2019 (UTC)
  • Symbol oppose vote.svg Oppose I think they can be derived sistematically from Library of Congress authority ID (P244) or, only in absence of P244, from VIAF ID (P214); the fact that VIAF dumps don't always link to WorldCat Identities probably can't prove that WorldCat Identities doesn't contain an entry, e.g. for Leonardo da Vinci (Q762) it is This criterium is already used in en:Template:Authority control and it:Template:Controllo di autorità to show automatic links to WorldCat Identities based on P244 and, only if P244 is absent, on P214. I think a new property isn't needed (also because it's better to concentrate efforts on refining our connection with VIAF). --Epìdosis 13:38, 29 November 2019 (UTC)
  • Symbol support vote.svg Support I also think it can be derived but feels it adds value having it as a Wikidata property - Salgo60 (talk) 21:37, 2 December 2019 (UTC)
  • Comment: On one hand, I think that since the WorldCat listing is often derived from LCCN or VIAF IDs, an additional redundant identifier is unnecessary. However, I think WorldCat listings are extremely valuable: more so than probably any individual external identifier in that they not only list works by the subject by works about the subject, and easily direct readers to find those works in libraries. Since Wikidata items often don't link directly to WorldCat listings, and the WorldCat link is most often visible only in Wikipedia Authority control templates (which is contingent upon the subject having a Wikipedia article), a more direct route is desirable. Crucially, there is also substantial set of people who have entries in WorldCat but not in VIAF or LCCN, e.g. William Verbeck and Ernestine Hara Kettler: see previous discussions here and here. I'm more interested in finding a way to adroitly include these "orphan" WorldCat entries, rather than the somewhat clumsy work-around of described at URL (P973), if even on a temporary basis until a formal VIAF/LCCN ID is created. -Animalparty (talk) 06:38, 4 December 2019 (UTC)
@Animalparty: The regex, as it is displayed now, doesn't allow to insert values like William Verbeck and Ernestine Hara Kettler, which could effectively justify the creation of a new ID. Could you try to edit the regex in order to include them? --Epìdosis 18:16, 4 December 2019 (UTC)
  • Symbol oppose vote.svg Oppose use the other two properties instead. --- Jura 04:51, 5 December 2019 (UTC)
    • Looks like you'd rather need a property for the "np" code unless they are just search strings. --- Jura 18:53, 5 December 2019 (UTC)
  • Symbol support vote.svg Support Clearly useful and not covered by existing id's. I fixed the regex and added the Verbeck example (there may be 2 id's for him in Worldcat though - the plain np-verbeck,%20william looks like the same person to me.) ArthurPSmith (talk) 18:25, 5 December 2019 (UTC)