Property talk:P1195

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file extension
identifier for a file format (e.g. txt for a text file) used as suffix to the file name. Don't use dot at start.

Description	Suffix to the file name, that indicates the file format
Represents	filename extension (Q186157)
Data type	String
Domain	According to this template: instances of file formats - file format (Q235557) According to statements in the property: file format (Q235557), programming language (Q9143), file format family (Q26085352) or filename extension (Q186157) When possible, data should only be stored as statements
Allowed values	According to this template: 1 to 5 alphanumeric characters, underscore allowed According to statements in the property: [0-9a-zA-Z_@\+]+([\.\-][0-9a-zA-Z_@\+]+)?| When possible, data should only be stored as statements
Example	text file (Q86920) → txt GEDCOM (Q667761) → ged
Source	See: list of file formats (Q914874) (note: this information should be moved to a property statement; use property source website for the property (P1896))
Tracking: same	no label (Q42533424)
Tracking: usage	Category:Pages using Wikidata property P1195 (Q26690097)
See also	filename in archive (P7793)
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 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/P1195 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 20,165 Main statement 15,104 74.9% of uses Qualifier 5,056 25.1% of uses Reference 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 “file format (Q235557), programming language (Q9143), file format family (Q26085352), filename extension (Q186157)”: item must contain property “instance of (P31)” with classes “file format (Q235557), programming language (Q9143), file format family (Q26085352), filename extension (Q186157)” 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/P1195#Type Q235557, Q9143, Q26085352, Q186157, SPARQL

Format “[0-9a-zA-Z_@\+]+([\.\-][0-9a-zA-Z_@\+]+)?|”: 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). Known exceptions: CrLZH (Q28600441)
List of violations of this constraint: Database reports/Constraint violations/P1195#Format, SPARQL

Item “media type (P1163)”: Items with this property should also have “media type (P1163)”. (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/P1195#Item P1163, search, 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/P1195#Entity types

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/P1195#Scope, SPARQL

This property is being used by: it:Template:Linguaggio di programmazione ru:Шаблон:Wikidata/p1195, ru:Шаблон:Файловый формат, ru:Шаблон:Язык программирования ba:Ҡалып:Wikidata/p1195 be:Шаблон:Wikidata/p1195, be:Шаблон:Картка мовы праграмавання eo:Ŝablono:Informkesto dosiera aranĝo fr:Modèle:Infobox Langage de programmation hu:Sablon:Programozási nyelv infobox, hu:Sablon:Fájlformátum infobox hy:Կաղապար:Տեղեկաքարտ Ծրագրավորման լեզու, hy:Կաղապար:Տեղեկաքարտ Ֆայլի ֆորմատ incubator:Template:Wp/inh/Wikidata/p1195 tg:Шаблон:Wikidata/p1195 tt:Калып:Wikidata/p1195, tt:Калып:Программалаштыру теле, tt:Калып:Программалау теле ca:Plantilla:Infotaula format de fitxer, ca:Plantilla:Infotaula llenguatge programació uk:Шаблон:Мова програмування, uk:Шаблон:Infobox file format es:Plantilla:Ficha de formato de archivo, es:Plantilla:Ficha de lenguaje de programación v:it:Template:Linguaggio sl:Predloga:Infopolje Programski jezik, sl:Predloga:Infopolje programski jezik/peskovnik, sl:Predloga:Infopolje Programski jezik/peskovnik ja:Template:Infobox プログラミング言語 bg:Шаблон:Софтуер pt:Predefinição:Info/Linguagem de computador/Testes az:Şablon:Fayl formatı inh:Ло:Wikidata/p1195 vec:Modèl:Formato file, vec:Modeło:Infobox de Forma de file Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Pattern ^\.([0-9a-zA-Z_@\+]+([\.\-][0-9a-zA-Z_@\+]+)?)$ will be automatically replaced to \1. Testing: TODO list

Usage unclear

Example: text file (Q86920)=>.txt

Looks like a misunderstanding. There is no reason, why a text should have this ending. The example given in en:Text file is ".csv". pdf, doc etc. are all text files. So what is the use of this property? Was it meant for software? Than we should use "item" and not "string". --Kolja21 (talk) 12:14, 26 February 2014 (UTC)

@Kolja21: I think you are right about the example. A text file is just any file that contains mostly text. And this property should be assigned to file-formats and not things like "spreadsheet", "database file", "textfile", but rather "xls-file-format", "odb-file-format", "txt-file-format". --Tobias1984 (talk) 08:18, 27 February 2014 (UTC)

Availability for programming languages

I think this property should also be available for programming languages. The Infobox programming language in the english Wikipedia also has a file extension property ("file ext"). --Stiegenaufgang (talk) 17:47, 18 April 2014 (UTC)

The "item requires statement constraint" (Q21503247) for media type does not make much sense

Most file extensions do not have a distinct associated media type. Assigning a generic media type such as text/plain or application/octet-stream in such cases does not seem to make sense either. As a consequence the constraint causes many constraint violation errors. It should probably be removed. Trilemma2 (talk) 21:02, 2 February 2020 (UTC)

Thank you for this comment, I totally agree with you. Antoine Legrand (talk) 22:12, 19 July 2022 (UTC)

Strongly agree with this. MIME types and file extensions are completely unrelated, other than both being indicia of a file format/type. Eiim (talk) 01:30, 15 September 2023 (UTC)