**Feature summary** :
CommonsMetadata should add metadata like creator, copyrightNotice, creditText to JSON-LD when possible.
**Use case(s)** :
Images on Commons are [[ https://search.google.com/test/rich-results/result/r%2Fimage-licenses?id=9q6U1Jwk6PSWSzMDSqxUYw | missing some metadata ]] in JSON-LD. Most of the time those missing information are already ready to use ([[ https://commons.wikimedia.org/wiki/File:2016-11-13_01_Kjeungskj%C3%A6r_Lighthouse,_S%C3%B8r-Tr%C3%B8ndelag,_Norway.jpg#Summary | written inside Template:Information ]] and [[ https://github.com/wikimedia/mediawiki-extensions-CommonsMetadata/blob/5da222faeb11f4bc1f3cc41a6852dfce03c51102/src/TemplateParser.php#L38 | parsed by CommonsMetadata ]]), but it is not machine-readable as it is not written in any metadata format.
Since CommonsMetadata already do the same with licenses ([[ https://github.com/wikimedia/mediawiki-extensions-CommonsMetadata/commit/c1b9f60f0b27a65d4f2eb6e4b6926123254d13e9 | read from license template, parse them, and write them into JSON-LD ]]), and the Template:Information parser is already in place, it should be trivial to add the missing metadata into JSON-LD.
**Benefits**:
* Make information accessible by other parties (e.g. [[ https://developers.google.com/search/docs/appearance/structured-data/image-license-metadata#structured-data-type-definitions | Google Search ]])