Nothing
Code
cff_schema_keys(FALSE)
Output
[1] "cff-version" "message" "type"
[4] "license" "title" "version"
[7] "doi" "identifiers" "abstract"
[10] "authors" "preferred-citation" "repository"
[13] "repository-artifact" "repository-code" "commit"
[16] "url" "date-released" "contact"
[19] "keywords" "references" "license-url"
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