#annotation__note__notation  a comment (usually added to a text); "his notes were appended at the end of the article"
  supertype:  #commentary__comment  a written explanation or criticism or illustration that is added to a book or other textual material; "he wrote an extended comment on the proposal"
  subtype:  #quotation__citation__credit__reference__mention  a short note acknowledging a source of information or quoting a passage; "the student's essay failed to list several important citations"; "the article includes mention of similar clinical cases"
     subtype:  #photo_credit__photocredit  a note acknowledging the source of a published photograph
     subtype:  #cross-reference__crossreference__cross-index__crossindex  a reference at one place in a work to information at another place in the same work
  subtype:  #footnote  a note placed below the text on a printed page
  subtype:  #nota_bene__NB__N.B.  a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something; "the margins of his book were generously supplied with pencilled NBs"
  subtype:  #postscript__PS  a note appended to a letter after the signature

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