Property talk:P3098

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ClinicalTrials.gov ID
identifier in the ClinicalTrials.gov database

Applicable "stated in" value	ClinicalTrials.gov (Q5133746)
Data type	External identifier
Domain	According to this template: clinical trials According to statements in the property: clinical trial (Q30612) When possible, data should only be stored as statements
Allowed values	NCT(\d{8})
Example	Atrial Fibrillation Clopidogrel Trial With Irbesartan for Prevention of Vascular Events (Q288786) → NCT00243178 Trial of Treatments for COVID-19 in Hospitalized Adults (Q89155499) → NCT04315948
Formatter URL	https://clinicaltrials.gov/show/$1
Tracking: usage	Category:Pages using Wikidata property P3098 (Q89970871)
See also	OpenTrials ID (P6220), ANZCTR ID (P7019)
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/P3098 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 391,591 Main statement 391,561 out of 315,959 (124% complete) >99.9% of uses Qualifier 2 <0.1% of uses Reference 28 <0.1% 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/P3098#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/P3098#Unique value, SPARQL (every item), SPARQL (by value)

Format “NCT(0\d{7})”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P3098#Format, hourly updated report, 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/P3098#Scope, hourly updated report, SPARQL

Type “clinical trial (Q30612)”: item must contain property “instance of (P31)” with classes “clinical trial (Q30612)” 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/P3098#Type Q30612, 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/P3098#Entity types