Hello everyone,

I am trying to count how often every constraint type https://www.wikidata.org/wiki/Help:Property_constraints_portal#Constraint_types_alphabetically is used in wikidata. My first question:

What exactly does this query https://query.wikidata.org/#%23%20https%3A%2F%2Fwww.wikidata.org%2Fwiki%2FHelp%3AProperty_constraints_portal%0A%23%20popular%20contraints%0ASELECT%20%3Fconstraint%20%3FconstraintLabel%20%3Fct%0AWHERE%0A%7B%0A%20%20%7B%0A%20%20SELECT%20%3Fconstraint%20%28count%28*%29%20as%20%3Fct%29%0A%20%20WHERE%0A%20%20%7B%0A%20%20%20%20%3Fitem%20wdt%3AP2302%20%3Fconstraint%0A%20%20%7D%0A%20%20GROUP%20BY%20%3Fconstraint%0A%20%20%7D%0A%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22[AUTO_LANGUAGE]%2Cen%22.%20%7D%0A%7D%0AORDER%20BY%20DESC%28%3Fct%29%20ASC%28%3Fconstraint%29 count? If I understand it it counts for each constraint to how many properties it is applicable. According to the help page it is supposed to list the popular constraints. Do the authors of the query simply have another definition of popular constraints than I?

Which leads to my second question: How would I count the use of constraint types? What I mean by this is: How many statements exist that are subject to a constraint of type X?

Thanks in advance,

Adrian