Property talk:P8551

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Opera Online composer ID
identifier of a composer or librettist on Opera Online website

Applicable "stated in" value	Opera Online (Q96034469)
Data type	External identifier
Domain	human (Q5)
Allowed values	^\S+(\-[1-2]\d{3})?$
Example	Wolfgang Amadeus Mozart (Q254) → wolfgang-amadeus-mozart-1756 Giuseppe Verdi (Q7317) → giuseppe-verdi-1813 Georges Bizet (Q56158) → georges-bizet-1838 Johann Strauss II (Q83309) → johann-strauss-ii-1825
Source	https://www.opera-online.com/en/items?utf8=%E2%9C%93&q=&filters%5Bincl%5D%5Bitem%5D%5B%5D=author
Formatter URL	https://www.opera-online.com/fr/items/authors/$1 https://www.opera-online.com/en/items/authors/$1
See also	Opera Online work ID (P8549), Operabase ID (P4869), Opera Online opera house ID (P8552), Opera Online performer ID (P8790)
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/Constraint violations/P8551 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 114 Main statement 107 out of 107 (100% complete) 93.9% of uses Qualifier 4 3.5% of uses Reference 3 2.6% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Single value: this property generally contains a single value. (Help)

List of violations of this constraint: Database reports/Constraint violations/P8551#Single value, 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/P8551#Entity types

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/P8551#Unique value, hourly updated report, SPARQL (every item), SPARQL (by value)

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/P8551#Scope, hourly updated report, SPARQL

Format “\S+(\-[1-2]\d{3})?”: 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/P8551#Format, SPARQL

Type “human (Q5)”: item must contain property “instance of (P31)” with classes “human (Q5)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P8551#Type Q5, hourly updated report, SPARQL

Item “occupation (P106): composer (Q36834)”: Items with this property should also have “occupation (P106): composer (Q36834)”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P8551#Item P106, hourly updated report, search, SPARQL

Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia category (Q4167836), Wikimedia template (Q11266439), Wikimedia list article (Q13406463)”: this property must not be used with the listed properties and values. (Help)

List of violations of this constraint: Database reports/Constraint violations/P8551#Conflicts with P31, hourly updated report, SPARQL