Property talk:P5168

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applies to name of subject
(qualifier) label or alias name to which the claim applies (subject of the statement). To refer to name of the value, use "applies to name of object" (P8338)

Data type	Monolingual text
Usage notes	This property (as opposed to P8338) should be used to denote the precise name to which a given P138 claim corresponds. If A has been named after B but A can bear different names, use this property as a qualifier of P138 to specify the name of A which was formed from a name of B.
Example	toxic diffuse goiter (Q16483) → Graves' disease toxic diffuse goiter (Q16483) → Basedow's disease
<complementary property>	applies to name of object (P8338)
See also	valid in place (P3005), applies to name of object (P8338), subject named as (P1810)
Lists	Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Complex constraint violations/P5168 Database reports/Constraint violations/P5168
Proposal discussion	Proposal discussion
Current uses	Total 17,130 Main statement 2 <0.1% of uses Qualifier 17,121 >99.9% of uses Reference 7 <0.1% of uses

[create Create a translatable help page (preferably in English) for this property to be included here]

Scope is as qualifier (Q54828449): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P5168#Scope, hourly updated report, SPARQL

Item “named after (P138)”: Items with this property should also have “named after (P138)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P5168#Item P138, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P5168#Entity types

qualifier value would generally be a label or an alias of the item
check if the property is used correctly or add an alias (Help)
Violations query: SELECT ?item ?itemLabel ?v WHERE { ?item p:P138 [ pq:P5168 ?v ] FILTER NOT EXISTS { ?item rdfs:label ?l . FILTER( contains(lcase(?l) , lcase(?v)) && "mul" = lang(?v) ) } FILTER NOT EXISTS { ?item rdfs:label ?l . FILTER( contains(lcase(?l) , lcase(?v)) && lang(?l) = lang(?v) ) } FILTER NOT EXISTS { ?item skos:altLabel ?a . FILTER( contains(lcase(?a) , lcase(?v)) && "mul" = lang(?v) ) } FILTER NOT EXISTS { ?item skos:altLabel ?a . FILTER( contains(lcase(?a) , lcase(?v)) && lang(?a) = lang(?v) ) } SERVICE wikibase:label { bd:serviceParam wikibase:language "en" } } LIMIT 50
List of this constraint violations: Database reports/Complex constraint violations/P5168#qualifier value would generally be a label or an alias of the item

How to use with streets?

I use this property to show after whom a street is named, but I have no idea what to do with this mandatory (why?) qualifier. The same as the item? A street is named after one person. This is independent of the language. Examples: Anna-Schneider-Steig (Q96310963), Barbarossaplatz (Q94512856) – help please! I read the proposal, it did however not help me to understand … Thanks --Elya (talk)

@Elya, Jura1: Street could have been named after a different person in past, albeit in the same language. Or it could have two alternative names Vojtěch Dostál (talk) 08:33, 2 July 2020 (UTC)

Thanks, Vojtěch Dostál, so what would be the correct property value for the example objects? Many objects will have a title that's named after one other item all over the times and in all languages. However, it's am mandatory property, so what to add here in this case? --Elya (talk) 15:36, 2 July 2020 (UTC)

@Elya: In my humble opinion, you can use all which apply (at least one)... Vojtěch Dostál (talk) 21:12, 2 July 2020 (UTC)

Vojtěch Dostál, sorry: but which values would apply? Anna-Schneider-Steig (Q96310963) is named after (P138) Anna Schneider (Q94998065). And now? applies to name of subject (P5168) what exactly would apply? Again the name of the person in her language? I'm really a bit at loss here … We should definitely add more examples to the Property to make it clearer. --Elya (talk) 17:55, 3 July 2020 (UTC)

@Elya: In the case of a person's name (which usually doesn't change between languages), I think it's best to state his/her full name and use language "mul" (multiple languages). Vojtěch Dostál (talk) 15:48, 6 July 2020 (UTC)

For streets, in most cases it's fairly obvious, so the qualifier isn't needed. Accordingly, I removed the constraint at named after (P138) [1].
It can be interesting when the name of a street changes or if the name is different in some language. --- Jura 16:11, 6 July 2020 (UTC)

Which is something you usually don't know when you add P138 to items. I sort of liked the constraint. Vojtěch Dostál (talk) 20:21, 6 July 2020 (UTC)

For streets, it's seems fairly easy to figure out, but I noticed in one discussion that people who add it primarily to classes have a different view of the question. --- Jura 20:31, 6 July 2020 (UTC)

Use of applies to name of subject (P5168) and applies to name of object (P8338) qualifiers

Please see Property_talk:P8338#Use_on_Q6556889#P138 (about "Sons" in (e.g.) "xyz & Sons" and "I" in "How I met your mother"). --- Jura 11:45, 23 June 2020 (UTC)