Wikidata entity: P10923
| P1793 | format as a regular expression | String | ((?!.*\/.*)mailto:\S+@\S+\.[\-\w]{1,10}|(https?|ftp):\/\/(\S+\.)+\S+(\/\S*)?) | ??? |
| P31 | instance of | ... | Q21126229 (Wikidata property related to software) | Wikidata property related to software |
| P31 | instance of | ... | Q59910380 (Wikidata property related to data communication, storage, and retrieval) | Wikidata property related to data communication, storage, and retrieval |
| P31 | instance of | ... | Q84764641 (Wikidata property related to websites) | Wikidata property related to websites |
| P31 | instance of | ... | Q22582645 (Wikidata property for properties) | Wikidata property for properties |
| P6104 | maintained by WikiProject | ... | Q15831464 (WikiProject Websites) | WikiProject Websites |
| P5008 | on focus list of Wikimedia project | ... | Q15831464 (WikiProject Websites) | WikiProject Websites |
| P2302 | property constraint | ... | Q21502404 (format constraint) | format constraint |
| P2302 | property constraint | ... | Q21503250 (subject type constraint) | subject type constraint |
| P2302 | property constraint | ... | Q21510856 (required qualifier constraint) | required qualifier constraint |
| P2302 | property constraint | ... | Q52004125 (allowed-entity-types constraint) | allowed-entity-types constraint |
| P2302 | property constraint | ... | Q53869507 (property scope constraint) | property scope constraint |
| P3254 | property proposal discussion | Url | Wikidata:Property proposal/Error-report URL or e-mail - Wikidata | ??? |
| P1659 | related property | ... | P856 (official website) | official website |
| P1659 | related property | ... | P1401 (issue tracker URL) | issue tracker URL |
| P1659 | related property | ... | P11266 (contact page URL) | contact page URL |
| P2668 | stability of property value | ... | Q24025284 (sometimes changes) | sometimes changes |
| P1647 | subproperty of | ... | P2699 (URL) | URL |
| P1647 | subproperty of | ... | P968 (email address) | email address |
| P1647 | subproperty of | ... | P11266 (contact page URL) | contact page URL |
| P1629 | Wikidata item of this property | ... | Q136959768 (error-report page) | error-report page |
| P2271 | Wikidata property example for properties | ... | P214 (VIAF cluster ID) | VIAF cluster ID |
| P2271 | Wikidata property example for properties | ... | P227 (GND ID) | GND ID |
| P2271 | Wikidata property example for properties | ... | P244 (Library of Congress authority ID) | Library of Congress authority ID |
| P2271 | Wikidata property example for properties | ... | P396 (SBN author ID) | SBN author ID |
| P2271 | Wikidata property example for properties | ... | P7820 (Punjabipedia ID) | Punjabipedia ID |
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