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Projet Informatique

Distingo GNU gzip (Q283647) (software) - GZIP (Q10287816)

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Page de redirect dans wikipedia

accès par https://en.wikipedia.org/wiki/Gzip%20%28File%20format%29?redirect=no

#REDIRECT [[Gzip#File format]]{{wikidata-redirect|Q10287816}}{{R to section}}

Il faut d'abord supprimer le redirect, le temps de référencer sur Wikidata. Puis le restaurer en ajoutant le template wikidata-redirect

Voir décision sans implémentation !!!

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Quelques propriétés

Software

Title	ID	Data type	Description	Examples	Inverse
file extension	P1195	String	filename extension: filename suffix that indicates the format of the file's contents (e.g. "txt" for a text file). Omit the leading dot.	SVG <file extension> svg	-
media type	P1163	String	media type: IANA-registered identifier for a file type	JPEG <media type> image/jpeg	-
developer	P178	Item	video game developer and software developer: organization or person that developed the item	Microsoft Windows <developer> Microsoft	-
readable file format	P1072	Item	readable file format: file format a program can open and read	Inkscape <readable file format> SVG	-
writable file format	P1073	Item	writable file format: file format a program can create and/or write to	Inkscape <writable file format> SVG	-
software version identifier	P348	String	software version and version number: numeric or nominal identifier of a version of a software program or file format, current or past	Qgis <software version identifier> 2.0	-
software engine	P408	Item	software engine: software engine employed by the subject item	Wikipedia <software engine> MediaWiki	-

Information on standards

How to specify a standard?

easy cases when a property exists: ISO (ISO standard (P503)) and RFC (RfC ID (P892))
others cases : use described at URL (P973) if there is a link to the standard or described by source (P1343) if there is a wikidata entity for the standard
if the kind of standard is known, add a genre (P136) to give the information, like W3C Recommendation (Q2661442)
if the organisation in charge of the standard is wikidata entity , add a described at URL (P973), like International Telecommunication Union (Q376150)

Title	ID	Data type	Description	Examples	Inverse
ISO standard	P503	External identifier	ISO standard: numeric identifier of this ISO standard	JPEG 2000 <ISO standard> 15444	-
RfC ID	P892	External identifier	Request for Comments: identifier for an item in Request for Comments, a publication of IETF and the Internet Society (without "RFC" prefix)	Opus <RfC ID> 6716	-
RfC ID with qualifier publication date	P577	Point in time	publication date: date or point in time when a work was first published or released	Opus <RfC ID> 6716 <publication date> septembre 2012	-
described at URL with qualifier genre	P136	Item	genre, by genre and award for best album (genre): creative work's genre or an artist's field of work (P101). Use main subject (P921) to relate creative works to their topic	XML Schema <described at URL> http://www.w3.org/TR/xmlschema-0/ <genre> W3C Recommendation	-
described at URL with qualifier standards body	P1462	Item	standards organization: organisation that published or maintains the standard governing an item	JPEG File Interchange Format, version 1.02 <described at URL> https://www.itu.int/rec/T-REC-T.851-200509-I/en <standards body> International Telecommunication Union	-

How to specify if a file format is proprietary?

The idea is to use proprietary file format (Q2720536) to tell this information either in instance of (P31) or in subclass of (P279)

Title	ID	Data type	Description	Examples	Inverse
instance of	P31	Item	instance of: that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform)	ACE <instance of> proprietary file format	-
subclass of	P279	Item	subclass of: this item is a subclass (subset) of that item; all instances of this item are instances of that item; different from P31 (instance of), e.g.: volcano is a subclass of mountain (and an instance of volcanic landform); Everest is an instance of mountain	Photoshop File Format <subclass of> proprietary file format	-

The inverse is free format (Q8436198), but it could be usefull to specify copyright license (P275) with either a specific licence or public domain (Q19652), free license (Q196294), ...

Query for signature

The following query uses these:

Properties: file format identification pattern (P4152)   , encoding (P3294)  
```
SELECT ?item ?itemLabel ?pattern ?encodage ?encodageLabel
WHERE 
{
  ?item p:P4152 ?patternStatement.
  ?patternStatement ps:P4152 ?pattern.
  ?patternStatement  pq:P3294 ?encodage.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  # PRONOM internal signature
  FILTER (str(?encodage) != 'http://www.wikidata.org/entity/Q35432091')
  # HEXA pattern
  #FILTER (str(?encodage) != 'http://www.wikidata.org/entity/Q82828')
  # ASCII pattern
  FILTER (str(?encodage) != 'http://www.wikidata.org/entity/Q8815')
}
```

Try it!

Query all RIFF formats

The following query uses these:

Items: file format (Q235557)   , Resource Interchange File Format (Q1196805)

Properties: instance of (P31)   , subclass of (P279)   , based on (P144)  
```
SELECT DISTINCT ?item ?itemLabel 
WHERE {
  ?item (wdt:P31|wdt:P279)* wd:Q235557.
  ?item wdt:P144+ wd:Q1196805.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
```

Try it!

Oric

Oric (Q17042679)   : marque Oric
- Oric-1 (Q3356274)   ; instances : Charles Cros, Oric I computer - PR 1 (Q55260720)
- Oric Atmos (Q12746424)   ; instances : Charles Cros, Oric Atmos computer - CnAM 43734 (Q55260607)
- Oric Telestrat (Q3356276)

Famille Oric

Jeux pour Oric 1

Quelques auteurs

Quelques formats de fichiers

?format <nature de l'élément (P31)> <format de données (Q235557)>.

File format mapping in WikiProject Informatics

{{Infobox file format
| name 
 Joint Photographic Experts Group
| screenshot = [[File:Felis silvestris silvestris small gradual decrease of quality.png|border|240px]]
| caption = A photo of a cat with the compression rate decreasing, and hence quality increasing, from left to right.
| extension = <tt>.jpg</tt>, <tt>.jpeg</tt>, <tt>.jpe</tt><br /><tt>.jif</tt>, <tt>.jfif</tt>, <tt>.jfi</tt>
| mime = <tt>image/jpeg</tt>
| typecode = <tt>JPEG</tt>
| uniform type = public.jpeg
| owner = [[Joint Photographic Experts Group]]
| genre = [[lossy compression|lossy]] [[image format]]
| container for =
| contained by =
| extended from =
| extended to =
| magic = <tt>ff d8</tt>
| standard = ISO/IEC 10918, ITU-T T.81, ITU-T T.83, ITU-T T.84, ITU-T T.86
}}