#sketch.drawing__study  preliminary drawing for later elaboration; "he made several studies before starting to paint"
  supertype:  #drawing  picture produced by representing forms or objects on a surface by means of lines; "he did complicated pen-and-ink drawings like medieval miniatures"
  subtype:  #design  a preliminary sketch indicating the plan for something; "the design of a building"
  subtype:  #rough_drawing__roughdrawing__draft  a preliminary sketch of a design or picture
  subtype:  #vignette  a small illustrative sketch (as sometimes placed at the beginning of chapters in books)

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