class IsoDoc::Iso::Xref

def hierarchical_figure_names(clause, num)
  c = IsoDoc::XrefGen::Counter.new
  j = 0
  clause.xpath(ns(FIGURE_NO_CLASS)).noblank.each do |t|
    j = subfigure_increment(j, c, t)
    label = "#{num}#{hiersep}#{c.print}"
    sublabel = j.zero? ? nil : "#{(j + 96).chr})"
    figure_anchor(t, sublabel, label, "figure")
  end
  hierarchical_figure_class_names(clause, num)
end