| P31 | instance of | ... | Q21077852 (Wikidata property for physical quantities) | Wikidata property for physical quantities |
| P2302 | property constraint | ... | Q19474404 (single-value constraint) | single-value constraint |
| P2302 | property constraint | ... | Q21503250 (subject type constraint) | subject type constraint |
| P2302 | property constraint | ... | Q21510851 (allowed qualifiers constraint) | allowed qualifiers constraint |
| P2302 | property constraint | ... | Q52004125 (allowed-entity-types constraint) | allowed-entity-types constraint |
| P2302 | property constraint | ... | Q53869507 (property scope constraint) | property scope constraint |
| P2302 | property constraint | ... | Q21502838 (conflicts-with constraint) | conflicts-with constraint |
| P2302 | property constraint | ... | Q21503247 (item-requires-statement constraint) | item-requires-statement constraint |
| P2302 | property constraint | ... | Q21514353 (allowed units constraint) | allowed units constraint |
| P3254 | property proposal discussion | Url | None | ??? |
| P2875 | property usage tracking category | ... | Q26250028 (Category:Pages using Wikidata property P2370) | Category:Pages using Wikidata property P2370 |
| P2668 | stability of property value | ... | Q23611288 (never changes) | never changes |
| P1647 | subproperty of | ... | P2442 (conversion to standard unit) | conversion to standard unit |
| P2876 | type of unit for this property | ... | Q69197847 (coherent SI unit) | coherent SI unit |
| P1629 | Wikidata item of this property | ... | Q69197847 (coherent SI unit) | coherent SI unit |
| P1629 | Wikidata item of this property | ... | Q110682638 (conversion factor between units) | conversion factor between units |
| P1855 | Wikidata property example | ... | Q41803 (gram) | gram |
| P1855 | Wikidata property example | ... | Q174789 (millimetre) | millimetre |
| P1855 | Wikidata property example | ... | Q218593 (inch) | inch |
| P1855 | Wikidata property example | ... | Q6859652 (millimetre of mercury) | millimetre of mercury |
| P1855 | Wikidata property example | ... | Q44395 (pascal) | pascal |
| P2559 | Wikidata usage instructions | Monolingualtext | Use P2442 for conversions to non-SI units. | ??? |
| P2559 | Wikidata usage instructions | Monolingualtext | Uzu la econ P2442 por konverto en mezurunuon ne en la Internacia Sistemo de Unuoj. | ??? |
| P2559 | Wikidata usage instructions | Monolingualtext | 非国际单位制单位的转换请使用P2442。 | ??? |
| P10787 | FactGrid property ID | P834 |
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