Property talk:P171

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unit symbol
abbreviation of a unit for each language; if not provided, then it should default to English
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Type “unit of measurement (Q529): element must contain property “instance of (P3)” with classes “unit of measurement (Q529)” or their subclasses (defined using NLA Trove ID (P279)).
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P171#type, SPARQL
constraint “format constraint (Q673)” declaration error: “incorrect value of property “constraint status (P286)”, acceptable values are: “mandatory constraint (Q678)””.
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P171#Allowed qualifiers, SPARQL
constraint “conflicts-with constraint (Q798)” declaration error: “required qualifier “property (P341)” is missing”.
Scope is as main value (Q793): the property must be used by specified way only
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P171#scope, SPARQL
Allowed entity types are Wikibase item datatype (Q799): the property may only be used on a certain entity type
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P171#allowed entity types