Hi everyone,
As a data quality addict, I've been investigating the coverage of external identifiers linked to Wikidata items about people.
Given the numbers on SQID [1] and some SPARQL queries [2, 3], it seems that even the second most used ID (VIAF) only covers *25%* of people items circa. Then, there is a long tail of IDs that are barely used at all.
So here is my question: *which external identifiers deserve an effort to achieve exhaustive coverage?*
Looking forward to your valuable feedback. Cheers,
Marco
[1] https://tools.wmflabs.org/sqid/#/browse?type=properties "Select datatype" set to "ExternalId", "Used for class" set to "human Q5" [2] total people: http://tinyurl.com/ybvcm5uw [3] people with a VIAF link: http://tinyurl.com/ya6dnpr7