data ImperativeContent
  = ICParagraph  ImperativeParagraph
  | ICFormalItem ImperativeFormalItem
  | ICFootnote   ImperativeFootnote
  | ICSubsection ImperativeSubsection
  | ICSection    ImperativeSection
  | ICPart       ImperativePart
  | ICDocument   ImperativeDocument
  | ICImport     ImperativeImport
  deriving Eq

