Create a document object. A document object can be used to simply store data around a given identity or similar document. You can attach scans, PDFs, photos, videos, etc to the objectif you wish and these may be processed later (using the /scan function) to extract useful information. Or you can manually supply the extracted information if you choose.
Document objects can be used to create an entity, based on extracted or supplied data; or it may be attached to an existing entity, either directly or through an ID check.