Property talk:P2307

Documentation

• Start a query
• Properties using this qualifier (statistics)
• Count

Wikimedia Commons namespace
qualifier used with the Commons link property constraint (Q21510852) to specify acceptable Wikimedia Commons namespaces that a property value can link to

Data type	String
Domain	Wikidata property to link to Commons (Q18610173)
Allowed values	(File|Category|Creator|Institution|Data)
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/P2307 Database reports/Constraint violations/P2307
Proposal discussion	Proposal discussion
Current uses	Total 108 Main statement 2 1.9% of uses Qualifier 102 94.4% of uses Reference 4 3.7% of uses
Search for values

[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/P2307#Scope, hourly updated report, SPARQL

Format “(File|Category|Creator|Institution|Data)”: value must be formatted using this pattern (PCRE syntax). (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/P2307#Format, SPARQL

Allowed entity types are Wikibase property (Q29934218): 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/P2307#Entity types

Type “Wikidata property to link to Commons (Q18610173)”: item must contain property “instance of (P31)” with classes “Wikidata property to link to Commons (Q18610173)” or their subclasses (defined using subclass of (P279)). (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/P2307#Type Q18610173, SPARQL

Item “property constraint (P2302): Commons link constraint (Q21510852)”: Items with this property should also have “property constraint (P2302): Commons link constraint (Q21510852)”. (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/P2307#Item P2302, search, SPARQL

Qualifier only valid to use with "Commons link constraint"
This property must only be used as a qualifier for property constraint (P2302) values of Commons link constraint (Q21510852). (Help)
Violations query: SELECT ?item ?itemLabel ?constraint ?constraintLabel ?namespace WHERE { ?item p:P2302 [ps:P2302 ?constraint; pq:P2307 ?namespace]. FILTER (?constraint != wd:Q21510852). SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". } }
List of this constraint violations: Database reports/Complex constraint violations/P2307#Qualifier only valid to use with "Commons link constraint"

Title	ID	Data type	Description	Examples	Inverse
property constraint	P2302	Item	property constraint: constraint applicable to a Wikidata property	IMDb ID <property constraint> distinct-values constraint	-
exception to constraint	P2303	Item	item that is an exception to the constraint, qualifier to define a property constraint in combination with P2302	IUCN conservation status <exception to constraint> Varia jamoerensis	-
group by	P2304	Property	GROUP BY: qualifier to define a property constraint in combination with P2302 (Wikidata property constraint) that is used to group constraint violations in constraint violation reports	→ Property talk:P2304	-
item of property constraint	P2305	Item	allowed-entity-types constraint: qualifier to define a property constraint in combination with "property constraint" (P2302)	mass <item of property constraint> kilogram	-
property	P2306	Property	Wikidata property: qualifier to define a property constraint in combination with P2302 (property constraint), or to limit the scope of Q44292881 (wikidata statement)	→ Property talk:P2306	-
Wikimedia Commons namespace	P2307	String	qualifier used with the Commons link property constraint (Q21510852) to specify acceptable Wikimedia Commons namespaces that a property value can link to	→ Property talk:P2307	-
class	P2308	Item	class: qualifier to define a property constraint in combination with "property constraint" (P2302)	→ Property talk:P2308	-
relation	P2309	Item	relation and relation: qualifier to define a property constraint in combination with P2302. Possibly values are: "instance of", "subclass of" or "instance or subclass of". The qualifier to use with the property "relative" is "type of kinship" (P1039), not this	→ Property talk:P2309	-
minimum date (property constraint)	P2310	Point in time	qualifier to define a property constraint in combination with "property constraint" (P2302)	→ Property talk:P2310	-
maximum date (property constraint)	P2311	Point in time	qualifier to define a property constraint in combination with "property constraint" (P2302). Use "unknown value" for current date.	→ Property talk:P2311	-
maximum value	P2312	Quantity	maximum: qualifier indicating the lowest possible value of a quantity. "no value" can be used to specify no upper bound	range constraint <maximum value> 1,234	-
minimum value	P2313	Quantity	minimum: qualifier indicating the lowest possible value of a quantity	range constraint <minimum value> 0	-
format as a regular expression	P1793	String	regular expression: regex describing an identifier or a Wikidata property. When using on property constraints, ensure syntax is a PCRE	ISO 639-3 <format as a regular expression> [a-z]{3} and IMDb ID <format as a regular expression> ev\d{7}\/\d{4}(-\d)?|(ch|co|ev|nm|tt)\d{7}	-
constraint status	P2316	Item	Wikidata constraint status: qualifier to define a property constraint in combination with P2302. Use values "mandatory constraint" or "suggestion constraint"	property scope constraint <constraint status> mandatory constraint	-
syntax clarification	P2916	Monolingual text	syntax: qualifier for P1793 (regular expression): to provide a textual description of the regex syntax of a value. Should be displayable after the text "The value for the property should match" and be followed by the regex.	Yandex Music artist ID <syntax clarification> numerisk streng, 1 til 7 tall	-

Add Gallery as a possible value?

Commons gallery (P935) could use namespace specification. How should it be added? --Jarekt (talk) 20:14, 9 March 2018 (UTC)

The "format" for values is a regexp specific to each wiki

The problem is that the listed values in the regexp are only valid for Commons, but this format should be specified wiki by wiki, using qualifiers. Setting a generic contraint of format such as "(File|Category|Creator|Institution|Data)" will not work to specify valid namespaces for other wikis (including Wikidata itself !)

So most probably this "format constraint property" cannot be set as a constraint directly here in P2307 (and P2307 cannot be used as a valid contraint for Commons or any wiki), but by creating set derived constraints (based on P2307) one constraint for each wiki, so that we can indicate their correct namespaces they accept ("File", "Category", "User", or even the associated Talk namespaces OK on all wikis, but not "Data", "Creator", "Institution" which are Commons-specific, or "Author" which is specific to Wikibooks) in a required "format constraint property" to define in the derived constraint.

Note also that the regexp used here should not be case sensitive (namespaces in wikis are not case-sensitive) so that "data" if also valid; there are also accepted aliases (e.g. "Image" is a valid alias of "File". Do we want only the "canonical namespace names" (with the leading capital as displayed on the wiki), and not any alias (which is valid also for links) ? Can we infer such canonicalization from the regexp or should be declare each namespace for each wiki as separate Wikidata elements listing their known canonical names and all their known aliases, instead of specifying a regexp here ?

Verdy p (talk) 23:17, 15 March 2018 (UTC)

• Help:Property_constraints_portal/Commons_link attempts to explain what it is for.
  --- Jura 05:08, 16 March 2018 (UTC)