| Wikidata property with datatype string that is not an external identifier | Q21099935 |
| Wikidata property related to computing | Q47512165 |
| P3254 | property proposal discussion | https://www.wikidata.org/wiki/Wikidata:Property_proposal/CSS_code |
| P1896 | source website for the property | https://www.w3.org/Style/CSS/specs.en.html |
| P2302 | property constraint | format constraint | Q21502404 |
| distinct-values constraint | Q21502410 | ||
| allowed-entity-types constraint | Q52004125 | ||
| property scope constraint | Q53869507 | ||
| P2668 | stability of property value | sometimes changes | Q24025284 |
| P1629 | Wikidata item of this property | CSS property | Q25502958 |
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