Technically, there's 2 :-)

- Library of Congress authority ID (P244)
<https://www.wikidata.org/wiki/Property:P244>: Library of Congress ID for
authority control for persons, works, organizations and subject headings
(for book editions use P1144). Format: 1-2 specific letters followed by
8-10 digits (see regex).

- LCOC LCCN (bibliographic) (P1144)
<https://www.wikidata.org/wiki/Property:P1144>: Library of Congress ID for
bibliographic records (for books, serials, maps, music, video, etc only;
for names use P244)

-Thad
+ThadGuidry <https://plus.google.com/+ThadGuidry>



On Tue, Mar 6, 2018 at 11:36 AM Magnus Sälgö <salg...@msn.com> wrote:

> If you have an external identifier you often can find the record you want
>
>  Worldcat can use the lccn property
>
> See http://worldcat.org/identities/lccn-n79005597/
> That is Wikidata Q7724 <https://www.wikidata.org/wiki/Q7724> that has
> property
> P244 lcauth
> https://m.wikidata.org/wiki/Property:P244
>
> If you check VIAF you see The Wikidata record
> https://viaf.org/viaf/54154627/ and also Lccn 79005597
> https://viaf.org/processed/LC%7Cn%20%2079005597
>
> You can also use the Lccn number and find the Wikidata record
> https://tools.wmflabs.org/sqid/#/view?find=P244:n79005597
>
> Hope it make sense.... its loosely coupled system and then it maybe is not
> the best structure.....
>
> Regards
> Magnus Sälgö
> Stockholm, Sweden
>
> 6 mars 2018 kl. 18:15 skrev Ettore RIZZA <ettoreri...@gmail.com>:
>
> Dear all,
>
> I asked myself a series of questions about the links between Wikidata and
> other knowledge/data bases, namely those of OCLC and DBpedia. For example:
>
> - Why Wikidata has no property "Worldcat Identities
> <https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fworldcat.org%2Fidentities%2F&data=02%7C01%7C%7C24ed3d8b41df4df00fc008d58385ecec%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636559533579975247&sdata=DhHWzrQOoGjvmELLEAEXk49jehINSaIzcaSI2%2F9yWeg%3D&reserved=0>"
> while the English edition of Wikipedia systematically mentions this
> identity (when it exists) in its section "Autorithy control"  ?
>
> - Why do VIAF links to all editions of Wikipedia, but not (simply) to
> Wikidata ?
>
> - Why is there no link to DBpedia when the opposite is true ?
>
> These questions may seem very different from each other, but they
> ultimately concern a common subject and are all very basic. I suspect they
> had to be discussed somewhere, maybe at the dawn of Wikidata. However, I
> find nothing in the archives of this Newsletter, nor in the discussions on
> Wikidata.
>
> Could someone point me to some documentation on these issues ?
>
> Cheers,
>
> Ettore Rizza
>
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