As of 2022-03-07, the Wikidata property Library of Congress authority ID (P244) is used on 1,346,172 items as main value on statements (not counting qualifiers) of the Q and P namespaces.

Closest properties: by cardinality of intersection, by Jaccard index.

Display properties of the following types:                                    

Closest properties by cardinality of intersection

IDLabelIntersection cardinalityJaccard index
P214 VIAF ID 1,292,716
0.4622
P7859 WorldCat Identities ID 1,167,023
0.5760
P213 ISNI 921,638
0.5075
P646 Freebase ID 630,768
0.1228
P227 GND ID 575,620
0.2791
P269 IdRef ID 438,293
0.3013
P1006 Nationale Thesaurus voor Auteurs ID 433,743
0.3043
P2163 FAST ID 429,931
0.3185
P268 Bibliothèque nationale de France ID 428,548
0.2860
P1207 NUKAT ID 385,213
0.2592
P2671 Google Knowledge Graph ID 377,670
0.0453
P691 NKCR AUT ID 259,602
0.1693
P7293 PLWABN ID 228,811
0.1575
P7902 Deutsche Biographie (GND) ID 186,245
0.1044
P648 Open Library ID 174,113
0.1207
P8189 National Library of Israel J9U ID 161,550
0.1191
P950 Biblioteca Nacional de España ID 150,695
0.1082
P3987 SHARE Catalogue author ID 148,163
0.1083
P1015 NORAF ID 144,705
0.1061
P345 IMDb ID 137,720
0.0687
P3430 SNAC ARK ID 127,067
0.0937
P3368 Prabook ID 103,488
0.0704
P1871 CERL Thesaurus ID 94,736
0.0631
P7704 Europeana entity 93,627
0.0663
P4985 TMDb person ID 90,883
0.0612
P434 MusicBrainz artist ID 89,319
0.0604
P1953 Discogs artist ID 87,067
0.0590
P349 National Diet Library ID 86,284
0.0616
P8034 Vatican Library VcBA ID 85,076
0.0621
P1566 GeoNames ID 83,371
0.0168
P1315 NLA Trove people ID 83,278
0.0609
P1280 CONOR.SI ID 82,267
0.0601
P1417 Encyclopædia Britannica Online ID 79,678
0.0554
P271 CiNii author ID (books) 74,744
0.0551
P949 National Library of Israel ID 73,515
0.0544
P3065 RERO ID 65,536
0.0484
P2002 Twitter username 62,733
0.0393
P409 Libraries Australia ID 62,647
0.0464
P3417 Quora topic ID 61,143
0.0416
P535 Find a Grave memorial ID 58,921
0.0420
P906 SELIBR ID 58,714
0.0431
P5587 Libris-URI 57,587
0.0407
P6766 Who's on First ID 57,358
0.0307
P2949 WikiTree person ID 56,309
0.0367
P2605 ČSFD person ID 55,446
0.0395
P9918 Kallías ID 55,303
0.0399
P245 Union List of Artist Names ID 54,274
0.0390
P5882 Muziekweb performer ID 54,162
0.0393
P3762 openMLOL author ID 53,274
0.0393
P2604 Kinopoisk person ID 52,663
0.0376

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P7859 WorldCat Identities ID 1,167,023
0.5760
P213 ISNI 921,638
0.5075
P214 VIAF ID 1,292,716
0.4622
P2163 FAST ID 429,931
0.3185
P1006 Nationale Thesaurus voor Auteurs ID 433,743
0.3043
P269 IdRef ID 438,293
0.3013
P268 Bibliothèque nationale de France ID 428,548
0.2860
P227 GND ID 575,620
0.2791
P1207 NUKAT ID 385,213
0.2592
P691 NKCR AUT ID 259,602
0.1693
P7293 PLWABN ID 228,811
0.1575
P646 Freebase ID 630,768
0.1228
P648 Open Library ID 174,113
0.1207
P8189 National Library of Israel J9U ID 161,550
0.1191
P3987 SHARE Catalogue author ID 148,163
0.1083
P950 Biblioteca Nacional de España ID 150,695
0.1082
P1015 NORAF ID 144,705
0.1061
P7902 Deutsche Biographie (GND) ID 186,245
0.1044
P3430 SNAC ARK ID 127,067
0.0937
P3368 Prabook ID 103,488
0.0704
P345 IMDb ID 137,720
0.0687
P7704 Europeana entity 93,627
0.0663
P1871 CERL Thesaurus ID 94,736
0.0631
P8034 Vatican Library VcBA ID 85,076
0.0621
P349 National Diet Library ID 86,284
0.0616
P4985 TMDb person ID 90,883
0.0612
P1315 NLA Trove people ID 83,278
0.0609
P434 MusicBrainz artist ID 89,319
0.0604
P1280 CONOR.SI ID 82,267
0.0601
P1953 Discogs artist ID 87,067
0.0590
P1417 Encyclopædia Britannica Online ID 79,678
0.0554
P271 CiNii author ID (books) 74,744
0.0551
P949 National Library of Israel ID 73,515
0.0544
P3065 RERO ID 65,536
0.0484
P409 Libraries Australia ID 62,647
0.0464
P2671 Google Knowledge Graph ID 377,670
0.0453
P906 SELIBR ID 58,714
0.0431
P535 Find a Grave memorial ID 58,921
0.0420
P3417 Quora topic ID 61,143
0.0416
P5587 Libris-URI 57,587
0.0407
P9918 Kallías ID 55,303
0.0399
P2605 ČSFD person ID 55,446
0.0395
P3762 openMLOL author ID 53,274
0.0393
P2002 Twitter username 62,733
0.0393
P5882 Muziekweb performer ID 54,162
0.0393
P245 Union List of Artist Names ID 54,274
0.0390
P5034 National Library of Korea ID 52,446
0.0386
P1580 University of Barcelona authority ID (obsolete) 51,231
0.0378
P1017 Vatican Library ID (former scheme) 51,239
0.0378
P1695 NLP ID (unique) 51,134
0.0378