As of 2022-03-07, the Wikidata property Colour Index International constitution ID (P2027) is used on 145 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
P231 CAS Registry Number 140
 0.0001
P2566 ECHA InfoCard ID 135
 0.0024
P232 EC number 133
 0.0024
P3117 DSSTox substance ID 127
 0.0001
P235 InChIKey 124
 0.0001
P234 InChI 123
 0.0001
P7049 AICS Chemical ID (former scheme) 120
 0.0073
P662 PubChem CID 116
 0.0001
P8494 DSSTOX compound identifier 115
 0.0001
P661 ChemSpider ID 114
 0.0009
P646 Freebase ID 94
 0.0000
P652 UNII 93
 0.0014
P6366 Microsoft Academic ID 74
 0.0003
P679 ZVG number 64
 0.0088
P2840 NSC number 56
 0.0005
P683 ChEBI ID 52
 0.0005
P3073 CosIng number 50
 0.0097
P2062 HSDB ID 47
 0.0081
P592 ChEMBL ID 38
 0.0008
P486 MeSH descriptor ID 34
 0.0009
P628 E number 33
 0.0476
P10283 OpenAlex ID 28
 0.0003
P3345 RxNorm ID 27
 0.0029
P1579 Reaxys registry number 27
 0.0014
P665 KEGG ID 25
 0.0012
P1820 Open Food Facts food additive ID 23
 0.0489
P2671 Google Knowledge Graph ID 23
 0.0000
P1417 Encyclopædia Britannica Online ID 19
 0.0001
P7025 HCIS ID 18
 0.0047
P715 DrugBank ID 18
 0.0015
P1014 Art & Architecture Thesaurus ID 17
 0.0007
P5076 Römpp online ID 16
 0.0096
P657 RTECS number 16
 0.0087
P4342 Store norske leksikon ID 13
 0.0002
P5220 ICSC ID 12
 0.0067
P10077 Spanish Cultural Heritage thesauri ID 12
 0.0060
P244 Library of Congress authority ID 11
 0.0000
P2115 NDF-RT ID 10
 0.0030
P3417 Quora topic ID 10
 0.0001
P8408 KBpedia ID 9
 0.0002
P227 GND ID 9
 0.0000
P1578 Gmelin number 8
 0.0025
P6689 MassBank accession ID 8
 0.0007
P8072 CAB ID 8
 0.0001
P7524 CA PROP 65 ID 7
 0.0072
P4168 IEDB Epitope ID 7
 0.0021
P4964 SPLASH 7
 0.0009
P2892 UMLS CUI 7
 0.0003
P2004 NALT ID 6
 0.0009
P672 MeSH tree code 6
 0.0004

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P1820 Open Food Facts food additive ID 23
 0.0489
P628 E number 33
 0.0476
P3073 CosIng number 50
 0.0097
P5076 Römpp online ID 16
 0.0096
P679 ZVG number 64
 0.0088
P657 RTECS number 16
 0.0087
P2062 HSDB ID 47
 0.0081
P7049 AICS Chemical ID (former scheme) 120
 0.0073
P7524 CA PROP 65 ID 7
 0.0072
P5220 ICSC ID 12
 0.0067
P4849 International Numbering System number 1
 0.0067
P10077 Spanish Cultural Heritage thesauri ID 12
 0.0060
P9635 electronic Essential Medicines List medicine ID 2
 0.0050
P7025 HCIS ID 18
 0.0047
P5930 Open Food Facts ingredient ID 5
 0.0044
P2085 Nikkaji ID 3
 0.0040
P8491 AHECC 2017 ID 1
 0.0033
P2115 NDF-RT ID 10
 0.0030
P3345 RxNorm ID 27
 0.0029
P9272 DeCS ID 5
 0.0027
P1578 Gmelin number 8
 0.0025
P2566 ECHA InfoCard ID 135
 0.0024
P232 EC number 133
 0.0024
P4168 IEDB Epitope ID 7
 0.0021
P3338 Encyclopedia of Surfing ID 1
 0.0021
P2167 UNSPSC Code 3
 0.0020
P695 UN number 1
 0.0015
P715 DrugBank ID 18
 0.0015
P1579 Reaxys registry number 27
 0.0014
P10245 MedlinePlus drug identifier 2
 0.0014
P652 UNII 93
 0.0014
P665 KEGG ID 25
 0.0012
P10376 ScienceDirect topic ID 2
 0.0011
P8061 AGROVOC ID 2
 0.0011
P486 MeSH descriptor ID 34
 0.0009
P661 ChemSpider ID 114
 0.0009
P2004 NALT ID 6
 0.0009
P4964 SPLASH 7
 0.0009
P9545 Encyclopedia of China Online Database ID 4
 0.0008
P4211 Bashkir encyclopedia (Russian version) ID (former scheme) 1
 0.0008
P267 ATC code 3
 0.0008
P4235 PatientsLikeMe treatment ID 1
 0.0008
P592 ChEMBL ID 38
 0.0008
P6689 MassBank accession ID 8
 0.0007
P1014 Art & Architecture Thesaurus ID 17
 0.0007
P2057 Human Metabolome Database ID 4
 0.0006
P2840 NSC number 56
 0.0005
P683 ChEBI ID 52
 0.0005
P2064 KNApSAcK ID 2
 0.0005
P4746 Elhuyar ZTH ID 3
 0.0004