#subheading__subhead  a heading of a subdivision of a text
  supertype:  #heading__head  a line of text serving to indicate what the passage below it is about; "the heading seemed to have little to do with the text"
  subtype:  #title.subheading  a general or descriptive heading for a section of a written work; "the novel had chapter titles"
     subtype:  #credit.title  an entry on a list of persons who contributed to a film or written work
     subtype:  #caption__legend  brief description accompanying an illustration
     subtype:  #subhead__subtitle  secondary or explanatory title

No statement uses or specializes #subheading; click here to add one.