Property talk:P1893
Documentation
Open Plaques plaque ID
identifier for a commemorative plaque, on a building or other structure in Open Plaques
identifier for a commemorative plaque, on a building or other structure in Open Plaques
[create Create a translatable help page (preferably in English) for this property to be included here]
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/P1893#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/P1893#Unique value, SPARQL (every item), SPARQL (by value)
List of violations of this constraint: Database reports/Constraint violations/P1893#Format, hourly updated report, SPARQL
Allowed entity types are Wikibase item (Q29934200), Wikibase MediaInfo (Q59712033): 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/P1893#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/P1893#Scope, SPARQL
Type “commemorative plaque (Q721747)”: item must contain property “instance of (P31), subclass of (P279)” with classes “commemorative plaque (Q721747)” 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/P1893#Type Q721747, SPARQL
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/P1893#Item P921, search, SPARQL
List of violations of this constraint: Database reports/Constraint violations/P1893#Item P921, search, SPARQL
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/P1893#Item P547, search, SPARQL
List of violations of this constraint: Database reports/Constraint violations/P1893#Item P547, search, SPARQL
Adding constraints - type and main subject
editI added type and main subject constraints to distinguish how and where the id is applied. The OpenPlaque ID represents a commemorative plaque about a subject, but often is being applied to subjects directly. These constraints may affect the way OpenPlaque IDs are applied, but splitting the commemorative plaque to its own Q enables distinguishing the subject of the plaque from the plaque object about the subject allowing for the plaque Q to be linked and managed separately from the subject while retaining the relationship.