As of 2022-03-07, the Wikidata property RCR number (P4645) is used on 144 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 80
 0.0000
P7859 WorldCat Identities ID 69
 0.0000
P268 Bibliothèque nationale de France ID 67
 0.0001
P213 ISNI 64
 0.0000
P2671 Google Knowledge Graph ID 58
 0.0000
P244 Library of Congress authority ID 55
 0.0000
P1870 Name Assigning Authority Number 44
 0.0569
P8719 CCFr library ID 39
 0.2108
P2013 Facebook ID 35
 0.0002
P791 ISIL 30
 0.0014
P2002 Twitter username 23
 0.0001
P269 IdRef ID 23
 0.0000
P1838 PSS-archi ID 11
 0.0055
P1017 Vatican Library ID (former scheme) 10
 0.0002
P1315 NLA Trove people ID 10
 0.0001
P8034 Vatican Library VcBA ID 9
 0.0001
P227 GND ID 9
 0.0000
P380 Mérimée ID 7
 0.0001
P646 Freebase ID 7
 0.0000
P9756 Schoenberg Database of Manuscripts name ID 5
 0.0005
P3749 Google Maps Customer ID 5
 0.0001
P691 NKCR AUT ID 5
 0.0000
P4201 PagesJaunes ID 4
 0.0119
P9916 Journées européennes du patrimoine ID 4
 0.0107
P6773 HAL structure ID 4
 0.0007
P3065 RERO ID 4
 0.0001
P1015 NORAF ID 4
 0.0000
P8189 National Library of Israel J9U ID 4
 0.0000
P950 Biblioteca Nacional de España ID 4
 0.0000
P4959 paris.fr equipment ID 3
 0.0042
P3108 Yelp ID 3
 0.0012
P4015 Vimeo identifier 3
 0.0009
P1968 Foursquare venue ID 3
 0.0005
P3280 BAnQ author ID 3
 0.0002
P8179 Canadiana Name Authority ID 3
 0.0001
P949 National Library of Israel ID 3
 0.0000
P2003 Instagram username 3
 0.0000
P3215 SIRET number 2
 0.0012
P3977 Songkick venue ID 2
 0.0009
P6413 JORFSearch organization ID 2
 0.0005
P3836 Pinterest username 2
 0.0004
P2342 AGORHA person/institution ID 2
 0.0002
P3134 TripAdvisor ID 2
 0.0001
P6671 French public service directory ID 2
 0.0001
P5383 archINFORM project ID 2
 0.0001
P1273 CANTIC ID (old) 2
 0.0000
P9984 CANTIC ID 2
 0.0000
P2397 YouTube channel ID 2
 0.0000
P271 CiNii author ID (books) 2
 0.0000
P1616 SIREN number 2
 0.0000

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P8719 CCFr library ID 39
 0.2108
P1870 Name Assigning Authority Number 44
 0.0569
P4201 PagesJaunes ID 4
 0.0119
P9916 Journées européennes du patrimoine ID 4
 0.0107
P8936 CollEx-Persée ID 1
 0.0069
P7020 Arachne collection ID 1
 0.0068
P9949 AFNIL publisher ID 1
 0.0061
P1838 PSS-archi ID 11
 0.0055
P4388 Mappy place ID 1
 0.0044
P4959 paris.fr equipment ID 3
 0.0042
P4881 Maison d'écrivain ID 1
 0.0042
P3234 Code List for Cultural Heritage Organizations 1
 0.0040
P6696 PRELIB organization ID 1
 0.0030
P4016 SlideShare username 1
 0.0027
P7028 National Library of Luxembourg ID 1
 0.0027
P2942 Dailymotion channel ID 1
 0.0017
P5505 WorldCat Registry ID 1
 0.0015
P791 ISIL 30
 0.0014
P3215 SIRET number 2
 0.0012
P3108 Yelp ID 3
 0.0012
P3977 Songkick venue ID 2
 0.0009
P4015 Vimeo identifier 3
 0.0009
P3206 data.gouv.fr organisation ID 1
 0.0007
P4702 Google Arts & Culture partner ID 1
 0.0007
P539 Museofile 1
 0.0007
P6773 HAL structure ID 4
 0.0007
P6277 Objectif Gard topic ID 1
 0.0006
P1968 Foursquare venue ID 3
 0.0005
P6413 JORFSearch organization ID 2
 0.0005
P1481 vici.org ID 1
 0.0005
P9756 Schoenberg Database of Manuscripts name ID 5
 0.0005
P3267 Flickr user ID 1
 0.0005
P3324 petit-patrimoine.com ID 1
 0.0004
P3836 Pinterest username 2
 0.0004
P5785 EU Research participant ID 1
 0.0003
P3280 BAnQ author ID 3
 0.0002
P3347 PermID 1
 0.0002
P1309 EGAXA ID 1
 0.0002
P1017 Vatican Library ID (former scheme) 10
 0.0002
P9223 Provenio UUID 1
 0.0002
P2342 AGORHA person/institution ID 2
 0.0002
P2013 Facebook ID 35
 0.0002
P1670 Canadiana Authorities ID (former scheme) 1
 0.0002
P3134 TripAdvisor ID 2
 0.0001
P2037 GitHub username 1
 0.0001
P268 Bibliothèque nationale de France ID 67
 0.0001
P380 Mérimée ID 7
 0.0001
P3749 Google Maps Customer ID 5
 0.0001
P3608 EU VAT number 1
 0.0001
P4264 LinkedIn company ID 1
 0.0001