Property talk:P2968

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QUDT unit ID
identifier for unit of measure definition according to QUDT ontology

Applicable "stated in" value	QUDT - Quantities, Units, Dimensions and Data Types Ontologies (Q25917172)
Data type	External identifier
Domain	According to this template: unit of measurement (Q47574) According to statements in the property: unit of measurement (Q47574) When possible, data should only be stored as statements
Allowed values	[A-Za-z_][A-Za-z0-9_-]*
Example	metre (Q11573) → M (RDF) light-year (Q531) → LY (RDF)
Source	http://www.qudt.org/doc/DOC_VOCAB-UNITS.html
Formatter URL	http://qudt.org/vocab/unit/$1
See also	UN/CEFACT Common Code (P6512), UCUM code (P7825), Wolfram Language unit code (P7007), QUDT quantity kind ID (P8393)
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/P2968 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 1,018 Main statement 1,013 99.5% of uses Qualifier 2 0.2% of uses Reference 3 0.3% of uses
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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/P2968#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/P2968#Unique value, SPARQL (every item), SPARQL (by value)

Type “unit of measurement (Q47574)”: item must contain property “instance of (P31)” with classes “unit of measurement (Q47574)” 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/P2968#Type Q47574, SPARQL

Format “[A-Za-z_][A-Za-z0-9_-]*”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2968#Format, hourly updated report, SPARQL

Without qualifiers: this property should be used without any qualifiers. (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/P2968#allowed qualifiers

Item “measured physical quantity (P111)”: Items with this property should also have “measured physical quantity (P111)”. (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/P2968#Item P111, search, 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/P2968#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/P2968#Scope, SPARQL