Property talk:P6995

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National Transportation Safety Board report ID
identifier for a report about a transport accident from the National Transportation Safety Board

Represents	National Transportation Safety Board report (Q64852967)
Associated item	National Transportation Safety Board (Q1053145)
Data type	External identifier
Domain	transport accident (Q11822042), explosion (Q179057), oil spill (Q220187) or incident (Q12890393)
Allowed values	[A-Z]{3}\d{4}
Example	2015 Oklahoma State University homecoming parade crash (Q23303373) → HAB1608 American Airlines Flight 383 (Q28100218) → AAR1801 2016 Lockhart hot air balloon crash (Q26201735) → AAR1703 FedEx Express Flight 14 (Q5439889) → AAR0002 Delta Air Lines Flight 9570 (Q5254569) → AAR7303
Source	https://www.ntsb.gov/investigations/AccidentReports/Pages/Reports.aspx
Formatter URL	https://www.ntsb.gov/investigations/AccidentReports/Reports/$1.pdf https://www.ntsb.gov/investigations/AccidentReports/Pages/$1.aspx
Related to country	United States of America (Q30) (See 762 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 Database reports/Constraint violations/P6995 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 201 Main statement 191 95% of uses Qualifier 5 2.5% of uses Reference 5 2.5% 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/P6995#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/P6995#Unique value, SPARQL (every item), SPARQL (by value)

Format “[A-Z]{3}\d{4}|[A-Z]{3}\d{2}[A-Z]{2}”: value must be formatted using this pattern (PCRE syntax). (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/P6995#Format, SPARQL

Type “transport accident (Q11822042), explosion (Q179057), oil spill (Q220187), incident (Q12890393)”: item must contain property “instance of (P31), subclass of (P279)” with classes “transport accident (Q11822042), explosion (Q179057), oil spill (Q220187), incident (Q12890393)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P6995#Type Q11822042, Q179057, Q220187, Q12890393, 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/P6995#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/P6995#Scope, SPARQL