Property talk:P87

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librettist
author of the libretto (words) of an opera, operetta, oratorio or cantata, or of the book of a musical

Description	author of the libretto (words) of this opera
Represents	librettist (Q8178443)
Data type	Item
Domain	According to this template: work (Q386724) According to statements in the property: work (Q386724) or performing arts production (Q43099500) When possible, data should only be stored as statements
Allowed values	persons (note: this should be moved to the property statements)
Example	The Marriage of Figaro (Q201873) → Lorenzo Da Ponte (Q268166) Otello (Q172324) → Arrigo Boito (Q219491) Salome (Q723407) → Richard Strauss (Q13894)
Tracking: same	no label (Q57387064)
Tracking: differences	no label (Q57387042)
Tracking: usage	Category:Pages using Wikidata property P87 (Q23909064)
See also	lyrics by (P676), composer (P86)
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 By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers 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/P87 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 7,837 Main statement 7,832 >99.9% of uses Qualifier 5 <0.1% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Type “work (Q386724), performing arts production (Q43099500)”: item must contain property “instance of (P31)” with classes “work (Q386724), performing arts production (Q43099500)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P87#Type Q386724, Q43099500, hourly updated report, SPARQL

Value type “human (Q5), fictional human (Q15632617), group of humans (Q16334295)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value human (Q5), fictional human (Q15632617), group of humans (Q16334295) (or a subclass thereof). (Help)

List of violations of this constraint: Database reports/Constraint violations/P87#Value type Q5, Q15632617, Q16334295, hourly updated report, SPARQL

Property “occupation (P106): librettist (Q8178443), writer (Q36180), novelist (Q6625963), opera composer (Q21680731), playwright (Q214917)” declared by target items of “librettist (P87)”: If [item A] has this property with value [item B], [item B] is required to have property “occupation (P106): librettist (Q8178443), writer (Q36180), novelist (Q6625963), opera composer (Q21680731), playwright (Q214917)”. (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/P87#Target required claim P106, SPARQL

Scope is as main value (Q54828448): 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/P87#Scope, 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/P87#Entity types

Conflicts with “instance of (P31): libretto (Q131084)”: this property must not be used with the listed properties and values. (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/P87#Conflicts with P31, search, SPARQL

This property is being used by: it:Template:Opera, it:Template:Spettacolo teatrale ru:Шаблон:Балет, ru:Шаблон:Опера ru:Шаблон:Цикл опер ru:Шаблон:Карточка мюзикла ba:Ҡалып:Балет, ba:Ҡалып:Опера be:Шаблон:Опера cs:Šablona:Infobox - balet, cs:Šablona:Infobox - opera cv:Шаблон:Опера hu:Sablon:Zenés színmű infobox hy:Կաղապար:Տեղեկաքարտ Օպերա, hy:Կաղապար:Տեղեկաքարտ Երաժշտական ստեղծագործություն ru:Шаблон:Оперетта tt:Калып:Балет, tt:Калып:Опера, tt:Калып:Спиктәкел, tt:Калып:Спектакль uk:Шаблон:Балет, uk:Шаблон:Опера, uk:Шаблон:Мюзикл ca:Plantilla:Infotaula arts escèniques, ca:Plantilla:Infotaula composició, ca:Plantilla:IniciÒpera ka:თარგი:ინფოდაფა ბალეტი es:Plantilla:Ficha de obra de teatro, es:Plantilla:Wikidata Infobox gu:ઢાંચો:Wikidata Infobox, gu:ઢાંચો:Wikidata Infobox/core gl:Modelo:Ficha de obra de teatro, gl:Modelo:Obra de teatro eu:Txantiloi:Lan infotaula automatikoa, eu:Txantiloi:Lan infotaula kab:Talɣa:Infobox music, kab:Talɣa:Infobox intellectual work commons:Template:Wikidata Infobox/core cy:Nodyn:Wikidata Infobox id:Templat:Wikidata infobox, id:Templat:Kotak info Wikidata/inti mw:Template:Wikidata Infobox/core mr:साचा:विकिडाटा माहितीचौकट/core, mr:साचा:विकिडेटा माहितीचौकट/core sa:फलकम्:Wikidata Infobox ur:سانچہ:خانہ معلومات ویکی ڈیٹا/کور, ur:سانچہ:Wikidata Infobox/core q:fr:Modèle:Wikidata Infobox/core ha:Template:Infobox intellectual work de:Vorlage:Wikidata Infobox/core ta:வார்ப்புரு:Wikidata Infobox/core hi:साँचा:Wikidata Infobox/core sv:Mall:Wikidata Infobox/core s:zh:Template:Wikidata Infobox/core ckb:داڕێژە:Wikidata Infobox/core pt:Predefinição:Wikidata Infobox/core ku:Şablon:Wikidata Infobox/core mnw:ထာမ်ပလိက်:Wikidata Infobox/core ig:Àtụ:Infobox intellectual work s:bn:টেমপ্লেট:উইকিউপাত্ত তথ্যছক/মূল d:Template:Wikidata Infobox/core no:Mal:Wikidata Infobox/core s:ban:Mal:Wikidata Infobox/core ban:Mal:Wikidata Infobox/core lv:Veidne:Wikidata Infobox/core voy:shn:ထႅမ်းပလဵတ်ႉ:Wikidata Infobox s:hi:साँचा:Wikidata Infobox/core Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

opera

The property description here clearly says that this is to be used for operas, but 17 items currently use it for national anthem (Q23691). Should they not use P87, and instead use lyrics by (P676), and shouldn't the type constraint for this be narrowed to opera or subclasses of opera? --Haplology (talk) 07:08, 24 November 2014 (UTC)