Wikidata entity: P2028
| P17 | country | ... | Q30 (United States) | United States |
| P973 | described at URL | Url | None | ??? |
| P973 | described at URL | Url | None | ??? |
| P1793 | format as a regular expression | String | [\d-]+ | ??? |
| P1552 | has characteristic | ... | Q93868746 (numeric identifier) | numeric identifier |
| P31 | instance of | ... | Q8513 (database) | database |
| P31 | instance of | ... | Q7455778 (service number) | service number |
| P31 | instance of | ... | Q19595382 (Wikidata property for authority control for people) | Wikidata property for authority control for people |
| P2302 | property constraint | ... | Q19474404 (single-value constraint) | single-value constraint |
| P2302 | property constraint | ... | Q21502404 (format constraint) | format constraint |
| P2302 | property constraint | ... | Q21502410 (distinct-values constraint) | distinct-values constraint |
| P2302 | property constraint | ... | Q21503250 (subject type constraint) | subject type constraint |
| P2302 | property constraint | ... | Q52004125 (allowed-entity-types constraint) | allowed-entity-types constraint |
| P3254 | property proposal discussion | Url | Wikidata:Property proposal/Archive/33 - Wikidata | ??? |
| P2668 | stability of property value | ... | Q23611288 (never changes) | never changes |
| P1855 | Wikidata property example | ... | Q20658456 (Louis Julius Freudenberg) | Louis Julius Freudenberg |
| P1855 | Wikidata property example | ... | Q69672248 (Vincent Gerard Norton) | Vincent Gerard Norton |
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