To evaluate the completeness of items, there are currently several lists at Wikidata:
- a. WikiProject_Movies/Numbers#Key_indicators
- b. WikiProject_Movies/Numbers#Film_items_with_a_given_property
- c. WikiProject_Virtual_Twins#Numbers (percentage column and links to items missing them)
- d. Wikidata:Wikivoyage/Lists/Embassies ("completeness" column and definition)
- e. lists: riders and their horse ("completeness" column and definition)
Measuring could be done:
- 1. compared to properties present on other items in the same result. @Magnus 's tool "Related Properties" used to work well for that. See samples b. and c. above.
- 2. compared to a theoretical list included in the query. See samples a., d., and e. above.
- 3. compared to a theoretical list defined in properties for this type (P1963). Given that the property isn't used much, this might correspond to #1 or #2
- 4. compared to the percentage of uses in a larger set (e.g. items for politicians compared to items for people in general) or a comparable set (e.g. US senators compared to US presidents). Complete = same percentage of that of the comparable group.
- 5. (maybe) compared to some completeness marker
- 6. etc . [ please add more ]