text: import latexgen
  import refgen
  
  binary_tag_plugins = {
          (
              "math",
              "displaymath",
              #"picture",
              "pre",
              "latex"):latexgen.LatexGen,
          ("ref",):refgen.RefGen,
      }
  
  unary_tag_plugins = {
          ("ref-footer",):refgen.FooterGen,
      }
  