It is RECOMMENDED that any referenced contextual entities are also described in the RO-Crate Metadata File with the same identifier. Similarly it is RECOMMENDED that any contextual entity in the RO-Crate Metadata file is linked to from at least one of the other entities using the same identifier.
ro-crate-py does not load referenced entities that are not described in the file, so the author list can include basic strings as well as Person objects. The same applies to organizations.
It's not mandatory to describe referenced contextual entities - see https://www.researchobject.org/ro-crate/1.1/structure.html :
ro-crate-pydoes not load referenced entities that are not described in the file, so theauthorlist can include basic strings as well asPersonobjects. The same applies to organizations.