Esc3300 added a comment.

parameter for single value constraint. Multiple values are allowed under the single value constraint if they have different values for this property

Maybe it should ready "this qualifier" instead of "this property" (meant is the value of the qualifier P4155). The value of the the statement that is being qualified shouldn't have an impact (it can be a string/URL/external id) depending on the property's datatype. Sample: there is a single-value constraint on "official website". Multiple values are possible if a qualifier states the language of the website.

@Ivan_A_Krestinin would have full details about its current workings.

Are two unknown values for the separating property considered different?

I don't think the value of the property that is being qualified matters.

Should this also extend to the “multi value” constraint (e. g. must have multiple values with different values for the separating property)?

IMHO, the separator could make it possible that a property has both constraints: single-value and multiple-value ;)


TASK DETAIL
https://phabricator.wikimedia.org/T173594

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To: Esc3300
Cc: Lucas_Werkmeister_WMDE, Esc3300, Ivan_A_Krestinin, Aklapper, GoranSMilovanovic, QZanden, Agabi10, Izno, Wikidata-bugs, aude, Mbch331
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