| Wikidata property with datatype string that is not an external identifier | Q21099935 |
| Wikidata property related to classification schemes | Q108566342 |
| Wikidata property for items about astronomical objects | Q21451142 |
| P1793 | format as a regular expression | (?:[\[(A-Za-z?\d]|:\+|<=?|>=?)[A-Za-z\d\-+*?\/()\[\]:\. _;,!~']* |
| P3254 | property proposal discussion | https://www.wikidata.org/wiki/Wikidata:Property_proposal/Archive/3#P215 |
| P1896 | source website for the property | http://cdsweb.u-strasbg.fr/simbad/guide/chD.htx |
| P2302 | property constraint | subject type constraint | Q21503250 |
| allowed qualifiers constraint | Q21510851 | ||
| citation-needed constraint | Q54554025 | ||
| format constraint | Q21502404 | ||
| allowed-entity-types constraint | Q52004125 | ||
| single-best-value constraint | Q52060874 | ||
| property scope constraint | Q53869507 | ||
| P2875 | property usage tracking category | Category:Pages using Wikidata property P215 | Q29168733 |
| P2668 | stability of property value | sometimes changes | Q24025284 |
| P1629 | Wikidata item of this property | spectral class | Q179600 |
| Q29168733 | Category:Pages using Wikidata property P215 | related property | P1659 |
| Q179600 | spectral class | Wikidata property | P1687 |
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