article ja "注釈の例"
body
  cons paragraph
    cons sentence
      cons text "これは"
      cons ruby text "文書" text "ぶんしょ"
      cons text "を"
      cons ruby text "記述" text "きじゅつ"
      cons text "するための"
      cons anno text "DSL" cons text "Domain Specific Language" nil
      nil
    nil
  nil