Enrich the Publication and Document models #4
Description
At minimum, we probably need a title field for the Document model, since it will often be separately titled. Also iso2_county_code. But there's loads of other metadata that might also be of interest, including license and last modified date and language codes and country categories/characteristics. I may want to look at the Zotero schema and borrow from it, or even link our content models to a separate external Zotero or Zotero-like database service that handles the citations.