Property talk:P7021

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Arachne object ID
identifier for an object in the Arachne database, version 3

Applicable "stated in" value	Arachne (Q624540)
Data type	External identifier
Domain	work of art (Q838948) or inscription (Q1640824)
Allowed values	[1-9]\d*
Example	Venus de Milo (Q151952) → 14806 Apollo Belvedere (Q619135) → 19437 Bust of Augustus wearing the oak crown Ra 57 (Q24580187) → 18872
Formatter URL	https://arachne.uni-koeln.de/item/objekt/$1
Related to country	Germany (Q183) (See 347 others)
See also	Arachne building ID (P6787), Arachne collection ID (P7020), Arachne entity ID (P10510)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements 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/Constraint violations/P7021 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 133 Main statement 126 out of 166,004 (0% complete) 94.7% of uses Qualifier 4 3% of uses Reference 3 2.3% of uses
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Type “work of art (Q838948), inscription (Q1640824)”: item must contain property “instance of (P31)” with classes “work of art (Q838948), inscription (Q1640824)” 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/P7021#Type Q838948, Q1640824, SPARQL

Single value: this property generally contains a single value. (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/P7021#Single value, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (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/P7021#Unique value, SPARQL (every item), SPARQL (by value)

Format “[1-9]\d*”: 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/P7021#Format, 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/P7021#Entity types

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (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/P7021#Scope, SPARQL

Item “Arachne entity ID (P10510)”: Items with this property should also have “Arachne entity ID (P10510)”. (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/P7021#Item P10510, search, SPARQL