Property talk:P2401

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Six Degrees of Francis Bacon ID
identifier in the Six Degrees of Francis Bacon database

Applicable "stated in" value	Six Degrees of Francis Bacon (Q64541608)
Data type	External identifier
Domain	According to this template: People According to statements in the property: human (Q5) When possible, data should only be stored as statements
Allowed values	\d{8}
Example	Jan Łaski (Q339351) → 10000001 William Carter (Q357410) → 10002142
Source	http://sixdegreesoffrancisbacon.com
Formatter URL	http://sixdegreesoffrancisbacon.com/?ids=$1
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/P2401 Database reports/Constraint violations/P2401 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 18,092 Main statement 13,436 out of 13,439 (100% complete) 74.3% of uses Qualifier 2 <0.1% of uses Reference 4,654 25.7% of uses
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Format “\d{8}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2401#Format, hourly updated report, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

List of violations of this constraint: Database reports/Constraint violations/P2401#Unique value, hourly updated report, SPARQL (every item), SPARQL (by value)

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). Known exceptions: Alexander von Wagner (Q680053)
List of violations of this constraint: Database reports/Constraint violations/P2401#Single value, SPARQL

Type “human (Q5)”: item must contain property “instance of (P31)” with classes “human (Q5)” 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). Known exceptions: Henry Austin (Q5717569)
List of violations of this constraint: Database reports/Constraint violations/P2401#Type Q5, SPARQL

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

List of violations of this constraint: Database reports/Constraint violations/P2401#Scope, 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/P2401#Entity types

website

http://sixdegreesoffrancisbacon.com is no longer existing--Oursana (talk) 10:48, 29 March 2016 (UTC)

Seems to be up and running now. Andrew Gray (talk) 13:19, 22 May 2016 (UTC)

Completed

As of today, everything in mix-and-match is now matched to a Wikidata item (save for five items which have since been deleted from SDFB and are marked as n/a). The catalogue was added in October 2015 so we may be missing some items added to SDFB in the last couple of years, but otherwise it's complete. Andrew Gray (talk) 20:23, 1 May 2017 (UTC)