Wikidata entity: P1793
| P973 | described at URL | Url | PCRE2 specification | ??? |
| P1630 | formatter URL | String | https://regex101.com/?regex=$1 | ??? |
| P31 | instance of | ... | Q19847637 (Wikidata property for an identifier) | Wikidata property for an identifier |
| P31 | instance of | ... | Q21099935 (Wikidata property with datatype string that is not an external identifier) | Wikidata property with datatype string that is not an external identifier |
| P31 | instance of | ... | Q21504947 (Wikidata property to indicate a constraint) | Wikidata property to indicate a constraint |
| P31 | instance of | ... | Q108566342 (Wikidata property related to classification schemes) | Wikidata property related to classification schemes |
| P6104 | maintained by WikiProject | ... | Q56162322 (WikiProject Property constraints) | WikiProject Property constraints |
| P2302 | property constraint | ... | Q19474404 (single-value constraint) | single-value 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 | ... | Q21502404 (format constraint) | format constraint |
| P2302 | property constraint | ... | Q21503250 (subject type constraint) | subject type constraint |
| P3254 | property proposal discussion | Url | Wikidata:Property proposal/Archive/29 - Wikidata | ??? |
| P1659 | related property | ... | P2916 (syntax clarification) | syntax clarification |
| P1659 | related property | ... | P4240 (regular expression syntax) | regular expression syntax |
| P1659 | related property | ... | P8460 (applies if regular expression matches) | applies if regular expression matches |
| P1659 | related property | ... | P8770 (format as language specific regular expression) | format as language specific regular expression |
| P1659 | related property | ... | P9790 (Smithsonian trinomial format regex) | Smithsonian trinomial format regex |
| P2668 | stability of property value | ... | Q24025284 (sometimes changes) | sometimes changes |
| P1629 | Wikidata item of this property | ... | Q185612 (regular expression) | regular expression |
| P1855 | Wikidata property example | ... | Q845956 (ISO 639-3) | ISO 639-3 |
| P1855 | Wikidata property example | ... | Q183205 (NTFS) | NTFS |
| P2271 | Wikidata property example for properties | ... | P345 (IMDb ID) | IMDb ID |
| P2271 | Wikidata property example for properties | ... | P7242 (Laws & Regulations Database of the Republic of China ID) | Laws & Regulations Database of the Republic of China ID |
| P2559 | Wikidata usage instructions | Monolingualtext | When used in property constraint, it should contain PCRE2 regular expression, treated as "full match". For example, "(?i)[a-z]+|\d+|" means that validated string should match /^(?:[a-z]+|\d+)$/i or be set to "no value" or "unknown value" | ??? |
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