Manage create and duplicate functionalities
This action requires the "update documents" permission.
On the document's page, it is possible to define "rules", that determine what values are written into what fields. (eg. a date field is, by default, set to today's date on the 'create' form).
Create
Defined in the "Create rules" field.

At current, the rules need to be defined in the JSON format: { "field_name": "field_value" }.
Update
Defined in the "Duplicate rules" field.

At current, the rules need to be defined in the JSON format: { "fields": [ {"field_name": "field_value"},... ]}