doc·u·men·ta·ry /ˌdɑkjəˈmɛntəri, ˈmɛntri/
  (a.)公文的,文件的;紀錄的,記實的記錄影片,記實小說
  Doc·u·men·ta·ry a. Pertaining to written evidence; contained or certified in writing. “Documentary evidence.”
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  documentary
       adj : relating to or consisting of or derived from documents [syn:
              documental]
       n : a film or TV program presenting the facts about a person or
           event [syn: docudrama, documentary film, infotainment]