| P9073 | applicable 'stated in' value | ... | Q3873059 (National Bibliography Number) | National Bibliography Number |
| P10726 | class of non-item property value | ... | Q3873059 (National Bibliography Number) | National Bibliography Number |
| P1793 | format as a regular expression | String | (?i)urn:nbn:.* | ??? |
| P1630 | formatter URL | String | https://nbn-resolving.org/$1 | ??? |
| P31 | instance of | ... | Q19847637 (Wikidata property for an identifier) | Wikidata property for an identifier |
| P2302 | property constraint | ... | Q19474404 (single-value constraint) | single-value constraint |
| P2302 | property constraint | ... | Q21502404 (format constraint) | format constraint |
| P2302 | property constraint | ... | Q52004125 (allowed-entity-types constraint) | allowed-entity-types constraint |
| P2302 | property constraint | ... | Q21502410 (distinct-values constraint) | distinct-values constraint |
| P3254 | property proposal discussion | Url | None | ??? |
| P1659 | related property | ... | P356 (DOI) | DOI |
| P1896 | source website for the property | Url | URN:NBN Resolver for Germany and Switzerland | ??? |
| P3303 | third-party formatter URL | String | https://nbn-resolving.org/$1 | ??? |
| P7470 | URN formatter | String | $1 | ??? |
| P1855 | Wikidata property example | ... | Q43363768 (Archives de littérature du Moyen Âge) | Archives de littérature du Moyen Âge |
| P1855 | Wikidata property example | ... | Q30156376 (???) | ??? |
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