Property talk:P3561

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Pro Football Reference player ID
identifier for American football players at Pro-Football-Reference.com

Associated item	Sports Reference, LLC (Q17082873)
Applicable "stated in" value	Pro Football Reference (Q7246590)
Data type	External identifier
Corresponding template	Template:Cite pro-football-reference (Q22744358), Template:Pro-football-reference (Q14411533)
Domain	human (Q5) (note: this should be moved to the property statements)
Allowed values	[A-Z]\/[a-zA-Z\-.]+\.?(\d{2}|\dc)
Example	Brian Schweda (Q24810030) → S/SchwBr21 Björn Werner (Q99048) → W/WernBj00 Younghoe Koo (Q29904093) → K/KooxYo00 Obed Ariri (Q16150305) → A/aririobe01
Source	https://www.pro-football-reference.com/players/
Formatter URL	https://www.pro-football-reference.com/players/$1.htm
Tracking: usage	Category:Pages using Wikidata property P3561 (Q28608855)
See also	NFL.com ID (former scheme) (P3539), Sports-Reference.com college football player ID (P3697), Pro Football Reference coach ID (P6836)
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 Database reports/Constraint violations/P3561 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 59,954 Main statement 26,819 44.7% of uses Qualifier 4 <0.1% of uses Reference 33,131 55.3% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

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/P3561#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).
List of violations of this constraint: Database reports/Constraint violations/P3561#Single value, SPARQL

Item “instance of (P31): human (Q5)”: Items with this property should also have “instance of (P31): human (Q5)”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P3561#Item P31, hourly updated report, search, SPARQL

Format “[A-Z]\/[a-zA-Z\-.]+\.?(\d{2}|\dc)”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P3561#Format, hourly updated report, SPARQL

Item “occupation (P106): American football player (Q19204627)”: Items with this property should also have “occupation (P106): American football player (Q19204627)”. (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/P3561#Item P106, search, 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/P3561#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/P3561#Entity types

Item “sport (P641): American football (Q41323)”: Items with this property should also have “sport (P641): American football (Q41323)”. (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/P3561#Item P641, search, SPARQL

This property is being used by: it:Template:Collegamenti esterni fr:Modèle:Infobox Personnalité du football américain, fr:Modèle:Infobox Personnalité du football américain/Bac à sable ja:Template:Infobox NFLplayer en:Template:Infobox NFL biography Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Pattern ^([A-Z])([^/]+)$ will be automatically replaced to \1/\1\2. Testing: TODO list