3. documentary

adjective. (ˌdɑːkjəˈmɛntɝi, ˌdɑːkjəˈmɛnɝi, ˌdɑːkjuːˈmɛntɝi, ˌdɑːkjuːˈmɛnɝi) Relating to or consisting of or derived from documents.