#diatonic_scale  a scale with eight notes in an octave; all but two are separated by whole tones
  supertype:  #musical_scale__scale  a series of notes differing in pitch according to a specific scheme (usually within an octave)
  subtype:  #musical_mode__musicalmode__mode  any of various fixed orders of the various diatonic notes within an octave
     subtype:  #ecclesiastical_mode__Gregorian_mode__church_mode__medieval_mode  any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode
     subtype:  #Greek_mode  any of the descending diatonic scales in the music of classical Greece
     subtype:  #major_scale__majorscale__major_diatonic_scale  a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th
     subtype:  #minor_scale__minorscale__minor_diatonic_scale  a diatonic scale with notes separated by whole tones except for the 2nd and 3rd and 5th and 6th

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