Property talk:P2945

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British Book Trade Index ID
identifier for an individual or business entity listed in the University of Oxford's Bodleian Libraries' British Book Trade Index database

Applicable "stated in" value	British Book Trade Index (Q25713895)
Data type	External identifier
Domain	According to this template: human (Q5) and organization (Q43229) According to statements in the property: human (Q5) or organization (Q43229) When possible, data should only be stored as statements
Allowed values	[1-9]\d*
Example	Wynkyn de Worde (Q725733) → 78064 F. H. Abraham (Q51955149) → 78 Robert Ashby (Q55115020) → 1910
Source	http://bbti.bodleian.ox.ac.uk
Formatter URL	http://bbti.bodleian.ox.ac.uk/details/?traderid=$1
Tracking: usage	Category:Pages using Wikidata property P2945 (Q55422216)
Related to country	United Kingdom (Q145) (See 328 others)
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 Map of people by place values: place of birth educated at work location residence place of death place of burial January 1st dates People with date of birth on January 1 People with date of death on January 1 People with both dates on January 1 Mix'n'match (Report) Database reports/Humans with missing claims/P2945 Database reports/Constraint violations/P2945 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 1,625 Main statement 1,508 92.8% of uses Qualifier 3 0.2% of uses Reference 114 7% 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/P2945#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/P2945#Unique value, SPARQL (every item), SPARQL (by value)

Type “human (Q5), organization (Q43229)”: item must contain property “instance of (P31)” with classes “human (Q5), organization (Q43229)” 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/P2945#Type Q5, Q43229, SPARQL

Format “[1-9]\d*”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2945#Format, hourly updated report, 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/P2945#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/P2945#Scope, SPARQL