Wikidata:Property proposal/Type of representation

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representation type[edit]

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DescriptionProperty to indicate the representation type as a qualifier for Wikimedia Commons SDC Depicts statements of such Wikidata items, indicating the media type of the media file as can be derived from its registered property in Wikidata, being different from P18 (image).
Representsimage (Q478798)
Data typeItem
DomainWikidata items having a media file, registered via a media property other than P18 and having an SDC Depicts statement in Wikimedia Commons requiring an SDC qualifier to the Wikidata item number to indicate the type of representation; the Q-number is derived from the original Wikidata media file linking property. Eventually those properties should all be properties used on Wikidata to register media files that are on Wikimedia Commons and being linked to the depicting Wikidata item.
Allowed valuesThe proposed property should be used as a qualifier. The base properties must be of subtype audio, image, or video. One typical example is video (P10) and video (Q98069877); image (P18) and disk image (Q592312) should not use the qualifier, for being redundant. It is the related Q-number that is to be used with the qualifier to the SDC depicts statement. The properties and related media types are interconnected in Wikidata via the reciproque properties Wikidata item of this property (P1629) and Wikidata property (P1687). You can find a list via this Wikidata Query.
Example 1File:Novosibirsk_Regional_Museum_at_night_2.jpgdepicts (P180)City Trade House (Q19908752)→nighttime view (Q28333482)
Example 2File:Google_Contacts_icon.svgdepicts (P180)Google Contacts (Q1537673)→computer icon (Q138754)
Example 3File:Aftakking KW linie 07.jpgdepicts (P180)Waver-Halle-Ninove Line (Q92417301)→plan (Q611203)
SourceYou can find a related discussion here, describing the necessity of this new property
Planned useWikimedia Commons media files should be made discoverable via Wikidata items and SDC (Structured data on Commons) P180 (depict) statements. Example query: Special:Search/P180:Q19908752.

Therefore Wikidata items and Wikimedia Commons media files should be bidirectionally linked. Typically Wikidata P18 (image) and SDC P180 (depict) are used to register such relationships.

Wikidata contains numerous items with statements referring to media files using properties other than P18 (image).

We need to qualify those depict statements in Wikimedia Commons SDC statements, referring to the Wikidata items that are not using P18, but other media file representation properties.

Wikimedia Commons requires SDC Depict statements media files to refer to such Wikidata items, with a qualifier having a (new) property “type of representation” and pointing to the (metadata) Wikidata item related to the original Wikidata property as represented by the type of image/media file.
Expected completenesseventually complete (Q21873974)
Robot and gadget jobsA bot is available to make immediate use of such new property, but is currently stopped, because the community made a remark that a proper qualifier should be used instead. We searched for such qualifiers but did not find any to be available. Therefore we need a new property, in order to let the bot restart its activity, after approval, using that specific new property. After the new property exists, all previously "wrong" statements can be migrated to the new property.
See alsodepicted format (P7984) but this can't be used as a qualifier, and is restricted to specific art objects. The new property is required to be very general.
Single-value constraintyes

Motivation[edit]

Currently (2024-04-04) GeertivpBot is blocked for Wikimedia Commons, because the required Wikidata property does not exist.

Till recently the SDC depicts statements in Wikimedia Commons were registered by the bot as (example) File:Novosibirsk_Regional_Museum_at_night_2.jpgdepicts (P180)nighttime view (Q28333482)of (P642)City Trade House (Q19908752), but the community of users believed that this is not consistent, and complicates the search of such objects. SDC depict statements should have the fysical object as target with a qualifier to indicate the type of representation.

Those statements should all be migrated into (example) File:Novosibirsk_Regional_Museum_at_night_2.jpgdepicts (P180)City Trade House (Q19908752)→nighttime view (Q28333482) once the new property is created.

This way the relationship between the Wikidata (depicts) item and the Wikimedia Commons media file can be bidirectionally documented in both platforms, using structured data statements.

To make it concrete: this is the Pywikibot script to automatically generate SDC Depict statements for Wikidata items with media files, which will use the new property. It will map the following Wikidata properties to Wikimedia Commons SDC Depict qualifier statements to the relevant Wikidata items: (Just let me know if you see any other combinations; I may have overlooked any?). Property image (P18) does not use this new property because it is registered as a "direct" Depict statement, without qualifier. 

video (P10): video (Q98069877)
image with color chart (P10093): image with color correction chart (Q109592922)
signature (P109): signature (Q188675)
image of grave (P1442): grave (Q173387)
route map (P15): road map (Q2298569)
logo image (P154): logo (Q1886349)
place name sign (P1766): place name sign (Q55498668)
plaque image (P1801): commemorative plaque (Q721747)
locator map image (P242): locator map (Q6664848)
montage image (P2716): collaging (Q170593)
icon (P2910): computer icon (Q138754)
sheet music (P3030): sheet music (Q187947)
image of design plans (P3311): plan (Q611203)
nighttime view (P3451): nighttime view (Q28333482)
flag image (P41): flag (Q14660)
spherical panorama image (P4640): spherical panorama (Q658252)
winter view (P5252): winter view (Q54819662)
schematic (P5555): diagram (Q959962)
image of interior (P5775): interior (Q2998430)
view (P8517): view (Q2075301)
aerial view (P8592): aerial view (Q56240104)
small logo or icon (P8972): favicon (Q2130)
coat of arms image (P94): coat of arms (Q14659)
page banner (P948): project:banners (Q22920576)
audio recording of the subject's spoken voice (P990): voice recording (Q53702817)

Geertivp (talk) 19:20, 4 April 2024 (UTC)[reply]

The above properties should be all properties used on Wikidata to register media files that are on Wikimedia Commons and linked to a Wikidata item. I have written a Wikidata Query that should basically reflect the above list correctly and completely. So I will have to make some corrections and additions in the Pywikibot script (I manually created the above list via actual "cases" that I found on Wikidata). Geertivp (talk) 08:08, 7 April 2024 (UTC)[reply]
Due to advancing insight, I have withdrawn the following properties:
image of backside (P7417): verso (Q9368452)
image of frontside (P7418): recto (Q9305022)
Geertivp (talk) 08:18, 9 April 2024 (UTC)[reply]

I have now corrected a number of entries in the above list, and added additional entries in the Pywikibot script, based on the query: 

cantilever sign (P10544)}} cantilever sign (Q1519903)
model image (P11101) model (Q1979154)
information sign (P11702) information sign (Q6031215)
monogram (P1543) monogram (Q168346)
seal image (P158) seal (Q162919)
distribution map (P1846) distribution map (Q97378230)
sectional view (P2713) cross section (Q12139782)
film poster (P3383) film poster (Q374821)
astronomic symbol image (P367) astronomical symbol (Q645745)
pronunciation audio (P443) pronunciation (Q184377)
sail emblem (P5962) sail emblem (Q1668447)
music video (P6718) music video (Q193977)
code (image) (P7415) symbol (Q80071)
creator's signature (P7457) signature (Q1373131)
image of molecular model or crystal lattice model (P8224) molecular model (Q2196961)
twin town sign (P8667) twin town sign (Q96279156)
rank insignia (P8766) rank insignia (Q34941835)
inscription image (P9906) inscription (Q1640824)

Geertivp (talk) 14:17, 8 April 2024 (UTC)[reply]

I think we should distinguish between the following (still non-existent) properties: (the current one, and two additional properties)
  1. Type of representation (representation type): the current proposal (deals with what the shot represents, based directly on the corresponding Wikidata item)
  2. Point of view (view point): fish eye, bird's eye view, marcro, sunset, sunrise, frontal, dorsal (idea from @Bertux; cannot be automatically derived from Wikidata)
  3. Technique used (type of recording): colour, black and white, raster, negative, positive, collodion (mirrored), relief, bas-relief, etching, engraving, woodcut, glass negative, stencil and blueprint; suggestion by @PVanPamel (can possibly be derived from the EXIF)
I think we could benefit from the three properties. Note that all these properties could also be used for video recordings... so we must not use typical photo descriptions.
Geertivp (talk) 08:18, 9 April 2024 (UTC)[reply]

Discussion[edit]

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