Feedback from POC {T236340} from people at WikiTree working with data quality ([[ https://www.wikitree.com/wiki/Space:Data_Doctors_Report_2019-10-27 | Space:Data_Doctors_Report ]])
# WikiTree have today > 70 000 people connected [[ https://www.wikidata.org/wiki/Property_talk:P2949 | Property 2949 ]]
# they use the Wikidata [[ Wikidata:Database reports/Constraint violations/P2949 | constraint violations reports ]] to check the data for
# [[ https://www.wikidata.org/wiki/Wikidata:Database_reports/Constraint_violations/P2949#%22Single_value%22_violations | Duplicates ]]
# [[ https://www.wikidata.org/wiki/Wikidata:Database_reports/Constraint_violations/P2949#%22Unique_value%22_violations | Unique value ]]
By mixing WikiTree people and WikiTree categories in one Wikidata will makes this less useful as Categories for e.g. a Swedish Parish in WikiTree could be same as two objects in Wikidata as we have decided to model the objects in a different way. This can be handled with exceptions (see Property 778) but splitting the property in one for human and one for Categories feels a better solution