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Structured data on Commons search federated inheritance
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Description

Files on Commons get structured data added to it. We started with captions and depicts. This will be expanded over time. When the image is a exact digital representation of the artwork, most of the structured data lives on Wikidata.

For example for https://commons.wikimedia.org/wiki/File:Christoph_Unterberger_-_Der_heilige_Johannes_von_Nepomuk_empf%C3%A4ngt_von_Maria_den_Sternenkranz_-_2173_-_%C3%96sterreichische_Galerie_Belvedere.jpg , the structured data lives on https://www.wikidata.org/wiki/Q28008188 . The file and the item are linked using the property digital representation of (P6243) which is added to the file (https://commons.wikimedia.org/w/index.php?title=File:Christoph_Unterberger_-_Der_heilige_Johannes_von_Nepomuk_empf%C3%A4ngt_von_Maria_den_Sternenkranz_-_2173_-_%C3%96sterreichische_Galerie_Belvedere.jpg&diff=prev&oldid=351075792 ).

In normal cases the search engine grabs all the local structured data, if P6243 is encountered, the data from the linked item should be included too.