|FOREIGN KEY constraints look like this:|
FOREIGN KEY (referencing-column-name [, referencing-column-nam<…>
From Mergen:
https://www.tarantool.io/en/doc/latest/reference/reference_sql/sql_statements_and_clauses/#table-constraint-definition-for-foreign-keys
I see that the described FK constraint is known as the FK tuple constraint. What about the FK field constraint? I'm not sure if the FK description should be duplicated due to different types of constraints, but they have different error descriptions and are described differently in '_space', so at least add a quick overview of that and links to 'tuple constraint' and ' field constraint ' looks like a good idea.